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    • 专利摘要:
    KNITTED COMPRESSION CLOTHING AND KNITTING METHOD A therapeutic medical garment having a variable pressure profile along its length, and including a knitted tubular body and a knitted non-slip portion formed near an end of the tubular body with an interior surface adapted to reside against the user's skin. The non-slip knitted portion includes at least first, second and third yarns knitted simultaneously to form a repeat having a high surface texture on the inner surface of the non-slip portion. One of the first, second and third threads is a low-friction yarn, and two of the first, second and third threads are high-friction yarns knitted to reside and form the high surface texture on the inner face of the non-slip portion. The tissue structure and a method of forming a tissue structure are also described.
    公开号:BR112015014660B1
    申请号:R112015014660-0
    申请日:2013-01-08
    公开日:2021-01-26
    发明作者:Larry Wayne Collins；Joachim Dietmar Adolf Bauer；Kevin Michael Tucker；Phillip Todd Clark
    申请人:Bsn Medical, Inc.；
    IPC主号:
    专利说明:

    TECHNICAL AREA AND BACKGROUND OF THE INVENTION
    [001] The present invention relates to a therapeutic medical compression garment, a knitted fabric and a method of forming a knitted fabric. More particularly, the present invention relates to a therapeutic compression garment with structural features on the inner surface to contact the wearer's skin. These structures increase the resistance to sliding down the limb that is characteristic of prior art sock products. For purposes of illustration, the invention described in this patent application relates to sock products used on the leg or leg length portions, and the term sock products, sock garments and compression stockings are used interchangeably.
    [002] Medical therapeutic compression garments are used to assist in the management of various venous and lymphatic disorders, especially in the lower extremities of the body. The purpose of compression stockings is to minimize or eliminate the effects of high venous pressures caused by disease or severity processes by reducing the tendency of blood to accumulate in the lower extremities. This type of compression stocking can also be applied to individuals, bedridden inactive to reduce the occurrence of clots in the lower extremities that can travel to the heart or lungs where they can develop a thromboembolism. This type of compression stocking functions by maintaining blood flow and typically having a graduated pressure profile to effect a predetermined compression of the leg sufficient to force blood upward out of the extremities and into circulation. External circumferential back pressure maintains venous and lymphatic pressures to a more normal level at the extremity, thus helping the circulation of venous and lymphatic blood from the extremity. Another important effect of compression is the reduction in venous volume which leads to an increase in the speed of venous flow. Edema reduction and prevention is the goal in patients with chronic venous insufficiency, lymphedema and other conditions causing edema. Subcutaneous pressures increase with elastic compression. This increase in subcutaneous tissue pressure acts to counter transcapillary forces, which favor fluid leakage out of the capillary.
    [003] There are a variety of medical therapeutic compression garments known. However, known therapeutic compression stockings tend to slip under the wearer's leg, thereby undermining the benefits of the compression stocking. An example of a therapeutic compression stocking is described in Patent No. 3,975,929 to Fregeolle which describes a tight length anti-embolism compression stocking made with alternating strokes of spandex yarns knitted on a circular stocking knitting machine. The compression stocking described in Fregeolle shows an edge turned around a top portion of the compression stocking and a narrow elastic band sewn to the top portion of the compression stocking. The inner face of the elastic band is supplied with balls or lines of friction fastening material that helps to support the upper end of the compression stocking on the user's leg by frictionally engaging the leg.
    [004] Another example of a therapeutic compression stocking is described in Patent No. 3,874,001 to Patience et al., Which describes a full length compression stocking having a foot and leg part made of elastic. The narrow band of non-slip elastomeric weft material is sewn on the upper end of the leg portion by over sewing. The particular seam used is said to provide adequate movement of the knitting loops in relation to each other to ensure deformation of the compression stocking once it is used.
    [005] Patent No. US 3,983,870 to Herbert et al. discloses a non-slip support for the limbs, especially a medical compression stocking. Herbert et al. addresses the problem of sliding by coating 20 to 30 percent of the inner surface of the thread knitted with a relatively soft, non-adhesive, non-continuous elastomeric polymeric material with a high friction coefficient for the skin in order to provide a slip resistant surface non-occlusive capable of holding the support in place on the body limb.
    [006] Yet another type of anti-embolism compression stocking is disclosed in U.S. Patent No. 3,728,875 to Hartingan, et al. This compression stocking is knitted on a circular stocking knitting machine and the upper portion is cut downward in a direction towards the cord and a wedge-shaped insert of soft stretch fabric is sewn into the slit to increase the circumference of the end top of the compression stocking. In socks of this type, the seam of the wedge increases the cost of production. The insert is formed by a different compression fabric than the remainder of the upper end of the sock so that the portion of the leg covered by the insert does not receive the same compression force as applied to the remainder of the user's leg. The compression stocking also has a partial elastic retention band made with a corrugated inner anti-slip urethane elastomer surface sewn to the upper narrow edge of the stocking and projecting over the remaining stocking compression so that its top forms a continuous line with the top of the insert.
    [007] Therefore, it is desirable to form the non-slip portions in compression garments that on the one hand keep the garment in position on the user's limb and, on the other hand, are comfortable to wear. In order to achieve a high degree of slip resistance between the compression garment and the respective body portion, it is known to incorporate the so-called "friction threads" for the knitted structure which has a high friction coefficient having the human skin . The high slip resistance reduces the tendency of the garment to slide along the body, and therefore it is not necessary for the garment to apply pressures in excess of an acceptable limit for the user.
    [008] Publication WO 2011/116952 Al ("Clemendot") discloses a piece of garment formed entirely from a high friction thread incorporated into a compression garment. It is a disadvantage of this knitted structure that the surface of the non-slip zone facing away from the user's body is also entirely formed by high friction yarns. This outer surface can cause a garment to wear on top of the compression garment to grab the underlying compression garment and be prevented from sliding easily in relation to the compression garment when the user moves, causing discomfort to the user .
    [009] A more recent compression stocking is disclosed in U.S. Patent No. 6,871,516 to Peeler et al. The compression stocking disclosed in Peeler is a therapeutic medical compression garment with an integrally knitted non-slip portion located in the upper area of the garment. The garment works by positioning high-friction yarns in direct proximity to the wearer's skin. The high friction characteristics result from the texture formed on the inner side of the garment during the knitting process.
    [0010] Thus, while improvements have been made to the anti-slip properties of anti-embolism garments, there remains a need for a low-cost, effective, therapeutic medical compression garment that will resist sliding down the leg. of user. SUMMARY OF THE INVENTION
    [0011] Therefore, it is an objective of the present invention to provide a compression garment having a knitted structure that forms a non-slip portion that results in a garment that is comfortable to wear and efficient and prevents the garment from slipping along. of the member on which it is used.
    [0012] It is another object of the present invention to provide a therapeutic garment having effective anti-slip properties.
    [0013] It is an additional object of the invention to provide a therapeutic medical compression garment that does not require sewing a separate elastomeric portion to the upper end of the garment.
    [0014] It is yet another objective of the present invention to provide a non-slip garment without structures that can cause high pressure in places of the lower limb, such as with bulky seams, overlaps / band joints, or silicone bands or stitches.
    [0015] According to an embodiment of the invention, a therapeutic medical garment is provided with a variable pressure profile along its length, and includes a knitted tubular body and a knitted non-slip portion formed near an end of the tubular body with an interior surface adapted to reside against the user's skin. The non-slip knitted portion includes at least first, second and third yarns knitted simultaneously to form a repeat having a high surface texture on the inner surface of the non-slip portion. One of the first, second and third threads is a low-friction yarn, and two of the first, second and third threads are high-friction yarns knitted to reside and form the high surface texture on the inner face of the non-slip portion.
    [0016] According to another embodiment of the invention, the low friction yarn has a friction coefficient of less than 0.5 and the two high friction yarns having a friction coefficient greater than 0.5.
    [0017] According to another embodiment of the invention, a knitted edge is formed at one end of the tubular body, and the non-slip portion is formed in the middle of the tubular body and has a surface provided with an interior texture adapted to reside in a non-slip condition. sliding against the user's skin to increase the non-slip properties of the garment.
    [0018] According to another embodiment of the invention, the body portion and the non-slip portion are integrally formed.
    [0019] According to another embodiment of the invention, base yarns of the garment comprise a knitted jersey structure.
    [0020] According to another embodiment of the invention, the knitted fabric is formed separately and simultaneously feeds a first low friction yarn, a second low friction yarn, a first high friction yarn and a second high friction yarn.
    [0021] According to another embodiment of the invention, high-friction yarns have a linear mass density between 20 and 5040 denier (22.2-5594 dtex).
    [0022] According to another embodiment of the invention, high-friction yarns are multifilament yarns selected from the group consisting of natural rubber, synthetic rubber and spandex.
    [0023] According to another embodiment of the invention, the high-friction yarns are coated with a coating material chosen from the group consisting of room temperature vulcanization elastomer, liquid silicone coating, silicone rubber, and elastomers of polyurethane.
    [0024] According to another embodiment of the invention, the first high friction yarn is knitted as an encrusting yarn and the second high friction yarn forms part of the knitted structure and acts to block the first high friction yarn in the repetition.
    [0025] According to another embodiment of the invention, the first high-friction yarn is knitted as a fouling yarn and the second high-friction yarn is knitted as a fouling yarn displaced to the first high-friction yarn.
    [0026] According to another embodiment of the invention, the low-friction yarns are between 15 and 1200 denier (16.6 and 1332 dtex).
    [0027] According to another embodiment of the invention, a therapeutic medical garment is provided having a variable pressure profile along its length, which includes a knitted tubular body and a knitted non-slip portion formed near one end of the body tubular with an inner surface adapted to reside against the user's skin. The non-slip knitted portion includes first, second, third and fourth yarns knitted simultaneously to form a repeat having a high surface texture on the inner surface of the non-slip portion. Two of the first, second, third and fourth threads are low-friction yarns, and two of the first, second, third and fourth threads are high-friction yarns knitted to reside and form the high surface texture on the inner face of the non-slip portion.
    [0028] According to another embodiment of the invention, in a repetition of the fabric structure of the non-slip portion, the relationship between the exposed length formed by a high friction yarn defined as lfy and the exposed length formed by a low friction yarn lby on a contact surface of the tissue structure intended to contact a user's body is greater than air = 0.3 preferably above r = 0.5, more preferably above r = 0.7, where the respective lengths are exposed lx of a wire x is defined as:
    and also in that a section sj of the wire x between two points in which the wire x is in direct contact with said contact surface, is multiplied by a factor of kl = l, a section sj of wire between a first point in which the wire is in direct contact with a contact surface, and a second point at which a wire is still arranged between the wire and the contact surface, is multiplied by a factor of K2 = 0.5. A sj section of wire between two points where the wire is not in direct contact with a contact surface, and is not considered when calculating the exposed length, that is, k3 = 0.
    [0029] According to another embodiment of the invention, there is provided a method for forming a knitted fabric structure for a therapeutic medical garment having a variable pressure profile along its length. The method includes the steps of forming a knitted tubular body including a knitted non-slip portion formed near an end of the tubular body with an inner surface adapted to reside against the wearer's skin, and having at least first, second and third threads knitted simultaneously to form a repetition having a high surface texture on the inner surface of the non-slip portion. One of the first, second and third threads is a low-friction yarn, and two of the first, second and third threads are high-friction yarns knitted to reside and form the high surface texture on the inner face of the non-slip portion. In each repetition of the non-slip portion the relationship between the exposed length formed by a high friction thread is defined as lfy and an exposed length formed by a low friction thread lby on a contact surface of the tissue structure intended to contact a body of the user greater than r = 0.3, where the respective exposed lengths lx of a wire x is defined as:
    and a sj section of wire x between two points where the wire x is in direct contact with said contact surface, is multiplied by a factor of K1 = 1. A sj section of wire between a first point where the wire is in direct contact with a contact surface, and a second point at which another wire is disposed between the wire and the contact surface, is multiplied by a factor of K2 = 0.5; and a sj section of wire between two points where the wire is not in direct contact with a contact surface, is not considered when calculating the exposed length, that is, k3 = 0.
    [0030] According to another embodiment of the invention, the body of the garment is preferably a circular knitted garment produced in any manner known to those skilled in the art, such as Jersey stitches.
    [0031] According to another embodiment, the non-slip portion can be knitted so as to extend only partially around the garment. In addition, a knitted panel with the non-slip portion can be separately formed and incorporated by sewing or otherwise in a garment. BRIEF DESCRIPTION OF THE DRAWINGS
    [0032] The present invention is best understood when the following detailed description of the invention is read with reference to the accompanying drawings, in which: Figure 1 shows an illustrative embodiment of a knitted structure according to the present invention; Figure 2 shows another embodiment of a knitted structure in accordance with the present invention; Figure 3 shows another embodiment of a knitted structure in accordance with the present invention; Figure 4 shows another embodiment of a knitted structure in accordance with the present invention; and Figure 5 illustrates a form of compression garment, which can be manufactured from any of the fabric constructions illustrated in Figures 1-4, among others, and according to the method described in this patent application. DETAILED DESCRIPTION OF THE FORMS OF MODALITIES OF THE INVENTION
    [0033] The knitted fabric according to the present invention is preferably produced by a conventional circular knitting process as described below, and the resulting structure can be described as an arrangement of repetitions and yarn positions within each repetition that collectively provide the desired friction effect on the user's limb.
    [0034] The invention according to the garment, fabric and fabric forming method disclosed in the present application can be used in garments used in different parts of the body, such as the leg, arm and torso, or parts thereof body parts. In addition, the inventive features of the invention have application to specific parts of garments, for example, the leg or arm portions of garments of lower body and upper body, such as pants and shirts.
    [0035] By "variable pressure profile" is meant a characteristic of a garment that is constructed of an elastomeric material formed to exert a compressive force against a portion of the body, for example an arm or leg, in which the elastomeric material provides a compressive force that is graduated from the distal area to the proximal area of the body portion. The compression force gradient varies from a maximum value in the distal zone, for example, the foot or hand, to a minimum value in the proximal region. The graduated compression force thus tends to move fluid out of the distal and towards the proximal area of the body portion to provide the desired therapeutic effect.
    [0036] The friction coefficient of a wire is determined according to the method as described in the ASTM D 3108-95 standard with the following additions. In particular, an apparatus as shown in Figure 2 of this standard has to be used and a winding angle of 163.5 ° over which the wire in question is in contact with the ceramic material bar identified below, the bar having a diameter of 8 mm. Finally, the pre-tension applied to the tested yarns was chosen to be 3.0 grams regardless of the dTex of the respective yarn. Thus, a deviation from the ATSM standard to provide a pre-tension below 0.04 grams per denier was employed in order to take into account the relatively high friction interaction between the ceramic material and the wires in question. The values for the respective friction coefficients are calculated based on the measured values for the input voltage and the output voltage, as described in the standard, that is, according to the equation specified in Section 11.4 of the ASTM standard.
    [0037] The term "low friction yarn" as used in this application refers to yarns that have a friction coefficient with respect to a predetermined standard ceramic material less than 0.5 and preferably less than 0.4.
    [0038] The term "high friction yarns" as used in this application refers to yarns that have a friction coefficient with respect to a predetermined standard ceramic material above 0.5, preferably above 0.6.
    [0039] Furthermore, it is preferable that the structure of the present invention is knitted, in such a way that when a single repetition of such a structure is considered the ratio r of the lengths exposed on a back surface between friction yarn and non-yarn friction exceeds r = 0.3 preferably r = 0.5, 7 more preferred r = 0. 1.
    [0040] The exposed length of the threads are those portions of the threads that are positioned on the back surface and that come into direct contact with a contact surface on which the structure is placed, that is, in the case of a garment of compression of the respective body portion of the user.
    [0041] In this respect the respective exposed lengths lx of a wire x is defined as:
    where sj are the sections of the respective wire between points of contact with the other wires in the repetition, points of contact being points at which a wire is guided through another wire.
    [0042] For the purposes of this order the standard ceramic material determined to be the desired predetermined one is a ceramic product manufactured and sold by DES Ceramica Pvt. Ltd, and identified as a "normal polished" material with a finished surface roughness of 0, 25 - 0.4 μRa, additionally identified at the link: http://www.desceramica.com:8080/Serface.jsp mainlink=mai ncat1 & parentid = 160.
    [0043] Another suitable material is Alsint 99.7 ceramics, manufactured and sold by Bolt Technical Ceramics, a Morgan Technical Ceramics company, a division of The Morgan Crucible Company plc. Other materials, including materials designed to replicate the surface characteristics of human skin, are suitable. The suitability of the knitted structure and compression garment is determined empirically, and then a pattern against which the desired knitted structure and compression garment can be replicated is selected. It follows that there are numerous standards that can be adopted to provide the desired standard, two of which are referenced above.
    [0044] Referring now to the drawings, in Figure 1 a first embodiment of a knitted structure 10 according to the present invention is shown, and a single repetition 12 forming the pattern of the structure 10 is indicated on the box. The repetition 12 of the knitted structure 10 according to the embodiment of Figure 1 includes a first low-friction yarn 14, a second low-friction yarn 16, a first high-friction yarn 18 and a second high-friction locking yarn 20 which are knitted on a four-feed knitting machine according to the following specification: 1st Feed: (low friction yarn) Textured nylon 1/70/34; Jersey knitting Second feeding: (high friction yarns) Asahi 420d C-701 Spandex; 1x2 incrustation 3rd Feed: (high friction blocking wire) Hyosung 140d C-100 Spandex; Jersey Knitting 4th Food: (low friction yarn) Stretch polyester 1/70/34; Knitting Jersey
    [0045] As is evident from this specification of the standard, the wires 14, 16, 18, 20 are separately fed and, therefore, are separate wires.
    [0046] In general, the materials of high friction yarns 18, 20 can be spandex, natural rubber; synthetic rubber, such as polyisoprene, styrene-butadiene rubber, styrene-ethylene / butylene-styrene and ethylene-propylene diene monomer, butyl rubber or (isobutylene), namely styrene-ethylene / butylene-styrene (S- EB-S), styrene-ethylene / propylene-styrene (S-EP-S), styrene-ethylene-ethylene / propylene-styrene (S-EEP-S), and hydrogenated styrene-isoprene / vinyl-isoprene-styrene.
    [0047] In particular, high friction yarns 18, 20 can be Asahi 420d C-701 Spandex, Asahi 280d C-804 Spandex, HyoSung 280d H-300 Spandex, HyoSung 140d C-100 Spandex or Asahi Roica C-701 ( 117 D / 130 dtex) (Spandex).
    [0048] However, it is also possible for coated yarns to be used as high friction yarns 18, 20, where the following materials can be used as coating materials: Room temperature vulcanization elastomers (Dow Corning® 3-3442, 3-3559, 3-7246 and 734), (Bluestar SILBIONE® TCS 7370), (Momentiv TP 3004, TP 3239, RTV 830, RTV 834, IS 5610 / W130, IS 5610 / 60C2, and IS 5628/90), (Wacker SILPURAN® 2110, 2120 and 2130); Liquid silicone coatings (XIAMETER® RBL-9252 / LSR 250 and LSR / 500), (Dow Corning 3631 LSR); Silicone rubber coatings (Dow Corning 7-9800 A & B, and 7-9700 A & B), (Novagards 800-240 and 800-142) and elastomeric polyurethane coatings (Bayer Material Science BAYMEDIX, IMPRANIL HS-85 LN , IMPRANIL DAH, IMPRANIL LP RSC 4002, BAYHYDROL 124, BAYHYDROL UH 240 and BAYHYDROLU XP 2428).
    [0049] High friction wires 18, 20 have a friction coefficient in relation to the above specified ceramic material above 0.5 and preferably above 0.6, this coefficient being measured according to the method described above. In addition, high-friction yarns are preferably between 20 and 5040 denier (22.2-5594 dtex).
    [0050] The low friction yarns 14, 16 of this structure 10 can, in general, be 4/70/48 Textured nylon, S or Z twist; 1/70/34 stretch polyester; 4/70/68 textured nylon, S or Z twist; Covered Wire 70 core 55-35DC, 1/70/34 textured nylon, Twist S or Z; "Dri-Release" 85% Polyester 15% Cotton, "Dri-Release" 88% Polyester 12% Wool and Supima cotton 26/1 Spun.
    [0051] The placement of threads in the knitted structure 10 of Figure 1 provides sufficient rigidity to generate a predetermined desired resistance for slipping of the fabric when being used. More specifically, the first and second high-friction yarns 18, 20, result in a higher overall length over which these high-friction yarns of the fabric extend when used.
    [0052] In particular, this knitted structure 10 the "shadow" effect of the first high-friction yarn 18 by the second, high-friction locking yarn 20, is distinctly different than that of the prior art. As shown in Figure 1, the high friction wire 18 is covered by the second high friction wire 20 only at points 22 where the second high friction locking wire 20 is used to block the first high friction wire 18 for the structure of fabric 10. Thus, the total effective length of high-friction yarns 18, 20 in direct contact with the user is increased compared to the prior art.
    [0053] The ratio r between the exposed length of low friction wires 14, 16 and high friction wires 18, 20 can be calculated according to the method specified above. For this purpose, the shape of each yarn in repetition 12 is separated into a plurality of sections, which for the purpose of the following calculations are considered to be of identical length. Each section sj extends from a contact point 22 with an additional wire to the next contact point 22, and this is illustrated for sections s1, s2 and s3 of a portion of the second high-friction wire 20 in Figure 1.
    [0054] For each of these sections the corresponding factor k1,2,3 is determined according to the following rules: a) If a section sj of the second high friction wire 20 extends between two contact points 22 with additional wires (in the In the case of the present portion, this is only the second low friction wire 16) at which points the second high friction wire 20 would be in direct contact with a contact surface as the user, the factor is k1 = 1; b) If a section sj of the second high friction wire 20 extends between a first contact point 22 where the second high friction wire 20 is in direct contact with a contact surface, and a second contact point 22 where the second low friction wire 16 is disposed between the second high friction wire 20 and the contact surface, the factor is k2 = 0.5; and c) If a sj section of the second high friction wire 20 extends between two points where the second high friction wire 20 is not in direct contact with a contact surface, it is not considered when calculating the exposed length, that is, k3 = 0.
    [0055] If these rules are applied to the second high friction wire portion 20 including sections s1, s2 and s3 this results in s1 at k1 = 0.5, s2 at k2 = 1 and s3 at k3 = 0.5 . Thus, the exposed length l for this single portion would be l = s1k1 + s2k1 + s3k1 = 1 x 0.5 + 1 x 1 + 1 x 0.5 = 2.
    [0056] In this way, the length exposed for each yarn 14, 16, 18, 20 in repetition 12 can be calculated. When the exposed lengths lby1, lby2, lfy1, lfy2 for the first low friction yarn 14, for the second low friction yarn 16, for the first high friction yarn 18 and for the second high friction yarn 20 were derived from of structure 10, the ratio r between the exposed length of high friction wires 18, 20 and the exposed length of low friction wires 14, 16 can be calculated according to:

    [0057] For structure 10 according to the first modality this results in r = 0.86 considering that the structure described in Peeler's reference has a relationship between the exposed lengths of r = 0.22. Thus, the structure 10 of the modality of Figure 1 results in an upper portion of high friction yarns being in direct contact with the user when the structure 10 is part of a compression garment so that the anti-slip effect is increased in comparison. with the prior art although low friction yarns 14, 16 are also employed.
    [0058] Referring now to Figure 2, a fabric structure 30 according to a second embodiment of the present invention is shown. Similar to the fabric structure 10, repeat 32 of the knitted structure 30 comprises a first low friction yarn 34, a second low friction yarn 36, a first high friction yarn 38, a second high friction yarn 40 and a third yarn. low friction 42 and these yarns are knitted according to the following specification for a four feed knitting machine: 1st Feed: (low friction yarn) Textured nylon 1/70/34; Jersey knit 2nd feeding: (high friction yarn) Asahi 420d C-701 Spandex; 2x2 incrustation 3rd feeding: (high friction and low friction locking threads) Hyosung 140d C-100 Spandex (friction thread) and 2/20/7 nylon (low friction thread); 3x1 rib 4a Feeding: (low friction yarn) Textured nylon 1/70/34; Knitting Jersey
    [0059] Thus, the yarns, 34, 36, 38, 40 and 42 are also fed separately and this structure 30 includes in addition to the low-friction yarns 34, 36 and 42 at least two high-friction yarns 38, 40 well knitted separately how they are responsible for the non-slip effect of this fabric structure 30.
    [0060] The wires 34, 36, 38, 40 and 42 used in this structure 30 can be chosen from the same groups as in the case of the first structure 10. Finally, the friction coefficient of the first and second high friction wires 38, 40 with respect to a ceramic material referenced above determined according to the aforementioned method must be above 0.5 and preferably above 0.6.
    [0061] When the ratio r in repetition 32 of the exposed lengths for the low friction yarns 34, 36 and the high friction yarns 38, 40/42 is calculated for the second structure 30 the result is r = 0.78 and, therefore, well above the known value from a prior art structure comprising high friction body and wires.
    [0062] Referring now to Figure 3, a fabric structure 50 according to a third embodiment of the present invention is shown. As with fabric structures 10 and 30, a repeat 52 of the third knitted structure 50 also includes a first low-friction yarn 54, a first high-friction yarn 56 and a second high-friction yarn 58. Although knitted on a knitting machine with four feeds, this fabric structure 50 is achieved by feeding only three threads, so that threads 54, 56, 58 are knitted according to the following specification: 1st Feeding: (low friction yarn) Textured nylon 1/70 / 34; Jersey knit 2nd feeding: (high friction yarns) Asahi 420d C-701 Spandex; 2x2 inlay 4th feeding: (high friction wires) Spandex 117D C-701; 2x2 alternative inlay
    [0063] The yarns are fed separately and in addition to the low friction yarn 54 of the fabric structure 50 comprises two high friction yarns 56, 58, knitted separately.
    [0064] As in the case of the aforementioned modalities of yarns 54, 56, 58 used in the present fabric structure 50, they are chosen from the same groups as in the case of the first and second structures 10 and 30. In particular, the coefficient of friction of the first and second high-friction yarns 56, 58 in relation to the ceramic materials referenced above and determined according to the aforementioned method is above 0.5 and preferably above 0.6.
    [0065] As shown in Figure 3, both the first and the second high friction yarns 56, 58 are knitted as floats in such a way that at points 60 where the first high friction yarn 56 is covered by a low friction yarn 54, the second high friction yarn 58 is on top of that low friction yarn 54 so that it is ensured that fewer high friction yarns 56 will come into contact with the user at the respective points 60.
    [0066] The ratio r in repetition 52 of the exposed lengths for low friction yarn 54 and high friction yarns 56, 58 can be calculated for the third structure 50, as well as to achieve a very desirable value of r = 1, 04.
    [0067] Referring now to Figure 4, a fabric structure 70 according to a fourth embodiment of the present invention is shown. As shown with reference to repetition 72, the knitted fabric structure 70 comprises a low friction yarn 74, a first high friction yarn 76 and a second high friction yarn 78. Fabric structure 70 is knitted according to the following specification: 1st Feed: (low friction yarn) Textured nylon 1/70/34; Jersey knit 2nd feeding: (high friction yarns) Asahi 420d C-701 Spandex; 3x1 inlay 4th feeding: (high friction wires) Spandex 1 17D C-701; 1x1 inlay
    [0068] As in the case of the previously described modalities, the yarns 74, 76, 78 used in this fabric structure 70 are chosen from the same groups as in the case of the first, second and third fabric structures 10, 30 and 50. In particular, the friction coefficient of the first and second high-friction wires 76, 78 in relation to the ceramic materials referenced above and determined according to the aforementioned method is above 0.5 and preferably above 0.6.
    [0069] As shown in Figure 4, both the first and the second high friction yarns 76, 78 are knitted as floats, such that at points 80 where the first high friction yarn 76 is covered by a low yarn friction 74, the second high friction wire 78 is at the top of this low friction wire 74 so that it is ensured that at least one high friction wire 78 will contact the user at the respective points 80.
    [0070] The ratio r in repetition 72 of the exposed lengths for low friction yarn 74 and high friction yarns 76, 78 is calculated for fabric structure 70, to achieve a very desirable value of r = 1.20.
    [0071] Referring now to Figure 5, a therapeutic medical compression garment in the form of a compression stocking is generally shown by reference number 90. Although, as mentioned above, the invention is described in this application for For purposes of illustration as a compression stocking with a variable pressure profile, the invention also includes any garments, such as compression stockings, sleeves and the like, for use on a patient to assist in the management of disorders and / or venous thrombosis or lymphatic in a patient's limb or torso.
    [0072] Compression stocking 90 according to the particular embodiment of Figure 5 has a body portion 92, a non-slip portion 94 integrally formed with the body portion 92 located near the upper end of compression stocking 90, and an optional edge 96 on top of compression stocking 90. Optional edge 96 is primarily intended to prevent the topmost top extension of compression stocking 90 from rolling down on itself and forming an unwanted thicker area, but can be omitted from the construction if desired, in the event that the non-slip portion 94 forms the upper end of the compression stocking 90.
    [0073] The non-slip portion 94 can be knitted so as to extend only partially around the garment. In addition, a knitted panel with a non-slip portion such as non-slip portion 94 can be separately formed and incorporated by sewing or otherwise in a garment.
    [0074] Body portion 92 of compression stocking 90 is preferably circular knitted in a manner known to those skilled in the art, for example, using Jersey stitches. The elastic textured yarns described above are knitted in jersey strokes. Compression stocking 90 can be knitted on any conventional knitting machine, such as a Santoni Pendolina medical knitting machine or a Lonati La-ME medical knitting machine.
    [0075] The non-slip portion 94 is knitted according to one of the fabric structures 10, 30, 50 or 70, and various modalities of thread construction and construction of two frequently used knitting machines are defined below by way of additional example for the knitted and yarn construction defined above: Yarn construction: "Santoni Pendolina medical knitting machine" 1st Feed: 1/70/34 Stretch nylon (S twist) 2nd Feed: Roica C-701--420 denier Spandex 3rd Feed: Hyosung C- 100-140 denier Spandex 4th Feed: 1/70/34 Stretch polyester Construction threads: "Lonati LA-ME knitting machine" 4th Feed: 1/70/34 Stretch nylon (S twist) ) 1st Feed: Roica C-701--420 denier Spandex 3rd Feed: Roica C-701- 117 denier Spandex Knitted construction: "Santoni Pendolina medical knitting machine" 1st Feed: Jersey knitting on all needles 2nd Feed: 1 x 2 incrustation (fold height) 3rd Feeding: Jersey knitting on all needles 4th Feeding: Jersey knitting on all needles Knitted construction: "Lonati LA-ME medical knitting machine" 4th Feeding: Jersey knitting on all needles 1st Feeding: 2x2 incrustation (fold height) 3rd Feeding: 2x2 alternate inlay (pleat height)
    [0076] The structures 10, 30, 50 and 70 described by way of example above allow an increase in the surface portion of the garment, for example, the compression stocking 90, facing the user's body to be formed by high friction yarns, as the second high friction yarn can be used to block the first high friction yarn having the knitted structure and vice versa, so that the high friction yarns are not protected by one or more low yarns friction and form a raised surface profile on the inside face of the compression stocking 90. The raised surface texture results from knitting the fabric such that the high friction threads of the non-slip portion 94 are formed as "floats" on the inside face of the fabric that is raised above the surrounding base wires to form a surface texture that provides the desired non-slip, relatively high friction characteristic against the user's skin.
    [0077] In addition, the fabric structures 10, 30, 50 and 70 are arranged in such a way that the surface of the compression stocking 90 with its back to the user is low friction yarns mainly, so that the high friction yarns they do not cause unpleasant adherence between the compression stocking 90 and other clothing items, such as skirts, dresses and pants worn over the compression stocking 90.
    [0078] The knitted structure achieved by the invention provides sufficient stiffness to generate a predetermined pressure, and the first and second high friction threads result in a higher total length along which high friction threads are in contact with the user's body. Thus, even a moderate pressure can already generate sufficient slip resistance when the contact length of high friction wires is longer compared to the structures of the prior art.
    [0079] A therapeutic medical garment, knitted fabric and method of forming a therapeutic medical garment according to the invention has been described with reference to specific embodiments and examples. Various details of the invention can be modified without departing from the scope of the invention. In addition, the foregoing description of the preferred embodiments of the invention and the best way to practice the invention are provided for the purpose of illustration only and not for the purpose of limitation.
    权利要求:
    Claims (11)
    [0001]
    1. Therapeutic medical garment (90) having a variable pressure profile along its length, and comprising: (a) a knitted tubular body (92); (b) a non-slip knitted portion (94) formed near an end of the tubular body (92) with an inner surface adapted to reside against the wearer's skin; (c) the knitted non-slip portion (94) including at least first, second and third threads (14, 16, 18, 20, 34, 36, 38, 40, 42, 54, 56, 58, 74, 76, 78) knitted simultaneously to form a repeat (12, 32, 52, 72) of a knitted structure having a high surface texture on the inner surface of the non-slip portion (94), where one of the first, second and third threads (14, 16, 18, 20, 34, 36, 38, 40, 42, 54, 56, 58, 74, 76, 78) is a low-friction yarn (14, 16, 34, 36, 54, 74), and yet in which two of the first, second and third threads (14, 16, 18, 20, 34, 36, 38, 40, 42, 54, 56, 58, 74, 76, 78) are high-friction threads (18, 20, 38 , 40, 42, 56, 58, 76, 78) knitted to reside and form the high surface texture on the inner face of the non-slip portion (94), characterized by the fact that the first high-friction yarn (18, 38, 56 , 76) be knitted as an inlay yarn, and the second high-friction yarn (20, 40, 58, 78) is also knitted as an the encrusting yarn moved to the first high friction yarn (18, 38, 56, 76) or is part of the knitted structure (10, 30, 50, 70) and acts to lock the first high friction yarn (18, 38, 56, 76) in the repetition (12, 32, 52, 72).
    [0002]
    2. Therapeutic medical garment (90) according to claim 1, characterized by the fact that the low-friction yarn (14, 16, 34, 36, 54, 74) has a friction coefficient of less than 0.5 and the two high friction wires (18, 20, 38, 40, 42, 56, 58, 76, 78) having a friction coefficient greater than 0.5.
    [0003]
    Therapeutic medical garment (90) according to either of claims 1 or 2, and characterized by the fact that it comprises: (a) a knitted edge (96) formed at one end of the tubular body (92); and (b) the non-slip portion (94) formed intermediate to the tubular body (92) and the rim (96) having a textured interior surface adapted to reside in a non-slip condition against the wearer's skin to increase the anti-slip properties of the garment (90).
    [0004]
    4. Therapeutic medical garment (90) according to claim 3, characterized in that the tubular body portion (92) and the non-slip portion (94) are integrally formed.
    [0005]
    5. Therapeutic medical garment (90) according to claim 4, characterized in that the base threads of the garment comprise a knitted jersey structure (10, 30).
    [0006]
    6. Therapeutic medical garment (90), according to claim 1, characterized by the fact that the knitted fabric is formed by separately and simultaneously feeding a first low-friction yarn (14, 34, 54, 74), a a second low friction wire (16, 36), a first high friction wire (18, 38, 56, 76) and a second high friction wire (20, 40, 58, 78).
    [0007]
    7. Therapeutic medical garment (90) according to claim 6, characterized by the fact that the high friction threads (18, 20, 38, 40, 56, 58, 76, 78) have a mass density linear between 22.2 and 5594 dtex.
    [0008]
    8. Therapeutic medical garment (90), according to claim 1, characterized by the fact that the high-friction yarns (18, 20, 38, 40, 56, 58, 76, 78) are multifilament yarns selected from from the group consisting of natural rubber, synthetic rubber and spandex.
    [0009]
    9. Therapeutic medical garment (90) according to claim 1, characterized by the fact that the high friction threads (18, 20, 38, 40, 56, 58, 76, 78) are coated with a material coating chosen from the group consisting of vulcanization elastomer at room temperature, liquid silicone coating, silicone rubber, and polyurethane elastomers.
    [0010]
    10. Therapeutic medical garment (90), according to claim 1, characterized by the fact that the low friction threads (14, 16, 34, 36, 54, 74) have between 16.6 and 1332 dtex.
    [0011]
    11. Therapeutic medical garment (90), according to claim 1, characterized by the fact that two of the first, second, third and fourth threads are of low friction (14, 16, 34, 36) and also by the fact that two of the first, second, third and fourth threads are of high friction (18, 20, 38, 40), knitted to reside in and form the high surface texture on the inner face of the non-slip portion (94), in which the first high friction wires (14, 34) are covered by the second high friction wires (16, 36) only at the points (22) where the second high friction wires (20, 40) block the first high friction wires (18 , 38) to the non-slip knitted portion.
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    同族专利:
    公开号 | 公开日
    US20140173808A1|2014-06-26|
    JP6141447B2|2017-06-07|
    EP2935671A1|2015-10-28|
    AU2013364389A1|2015-04-16|
    WO2014098928A1|2014-06-26|
    EP2935671B1|2017-06-14|
    US9345271B2|2016-05-24|
    MX348391B|2017-06-05|
    CA2887021C|2017-06-06|
    BR112015014660A2|2017-07-11|
    MX2015005366A|2015-07-06|
    AU2013364389B2|2016-03-03|
    CA2887021A1|2014-06-26|
    JP2016507664A|2016-03-10|
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    法律状态:
    2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-09-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-12-15| B09A| Decision: intention to grant|
    2021-01-26| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/01/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/724,045|US9345271B2|2012-12-21|2012-12-21|Knitted compression garment, knitted fabric and method of knitting fabric|
    US13/724,045|2012-12-21|
    PCT/US2013/020621|WO2014098928A1|2012-12-21|2013-01-08|Knitted compression garment and method of knitting same|
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