• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SELF-INFLATABLE TIRE. A self-inflating tire set includes an air tube connected to a tire and defining an airway, the air tube being composed of a flexible operating material to allow an air tube segment opposite a flat tire footprint up, closing the passageway, and resiliently flattening out to an original configuration. The air tube is sequentially flattened by the tire's footprint in a direction opposite to a direction of rotation of the tire to pump air along the passageway to an input device for the tire cavity. The input device for discharge from the passageway, or for an output device for steering into the tire cavity. The inlet device is positioned within the annular passageway 180 degrees opposite the outlet device, such that the sequential flattening of the air tube by the tire footprint affects the pumping of air along the airway path with the tire rotating or in a direction of progressive or regressive rotation. The invention also includes an input device for regulating the flow of (...).
    公开号:BR102012021803B1
    申请号:R102012021803-8
    申请日:2012-08-29
    公开日:2020-12-08
    发明作者:Daniel Paul Luc Marie Hinque
    申请人:The Goodyear Tire & Rubber Company；
    IPC主号:
    专利说明:

    Field of the Invention
    [001] The invention relates in general to self-inflating tires and, more specifically, to a pump mechanism for these tires. Background of the Invention
    [002] A normal diffusion of air reduces the pressure in the tire over time. The natural state of the tires is under inflated. Therefore, drivers must repeatedly act to maintain tire pressures, or they will experience lower fuel economy, tire life and less vehicle braking and maneuvering performance. Tire Pressure Monitoring Systems have been proposed to alert drivers when tire pressure is significantly low. These systems, however, remain dependent on the driver taking corrective action when prompted to re-inflate a tire to the recommended pressure. It is therefore desirable to incorporate a self-inflating feature within a tire that will auto-inflate the tire in order to compensate for any pressure drop in the tire over time, without the need for driver intervention. Summary of the Invention
    [003] The invention provides in a first aspect a set of self-inflating tires including a tire mounted on a rim, the tire having a tire cavity, first and second side walls extending respectively from first and second bead regions. tire to a tire tread region. An air tube is connected to the tire and defines an air passage. The air tube is composed of a flexible operating material to allow a portion of the air tube segment close to a tire ground contact area to substantially close the annular passageway. An inlet regulator device is connected to an inlet end of the air tube, and includes an insert mounted on the tire, where the insert has a hole through it having a first end located in the tire cavity, and a second end that extends through the tire. A pressure membrane is received within the first end of the insert, and a regulator body is received within the second end of the insert, where the regulator body has an inner passageway that extends from a first end to a distal end , where the distal end extends into an insert cavity, and the pressure membrane is sensitive to the tire pressure in the cavity and to the external air pressure. The pressure diaphragm is positioned to engage with the distal end of the regulator body when the pressure in the tire reaches a set value to open and close the regulator and allow or prevent flow from entering the regulator device.
    [004] The invention provides in a second aspect a set of self-inflating tires having a tire mounted on a rim, the tire having a tire cavity, first and second side walls extending respectively from first and second bead regions. tire to a tire tread region. A first and second air tubes are connected to the tire, where each air tube defines an air passage. Each air tube is composed of a flexible operating material to allow a portion of the air tube segment close to a tire ground contact area to substantially open and close the annular passageway. An inlet regulator device is connected to an inlet end of each air tube and includes a regulator body mounted on the tire sidewall. The regulator body has an external duct having a distal end located inside the tire cavity, in which the duct has an internal orifice that is in fluid communication with the tire cavity and with an internal chamber of the regulator body. The inner chamber is connected to two opposite passageways in the regulator body which are additionally connected to an inlet end of the first and second air tubes. A pressure diaphragm is mounted inside the internal chamber of the regulator body. An insert is mounted inside the internal chamber of the regulator body and has a flanged end that surrounds an internal cavity. The flanged end engages with the pressure diaphragm and can seal the flanged end against flow. The insert has an upper surface with one or more air holes extending from the upper surface, and are in fluid communication with the internal cavity, said insert also comprising two transverse ducts that are in fluid communication with the internal cavity. .
    [005] The invention provides in a third aspect a set of self-inflating tires comprising: a tire mounted on a rim, the tire having a tire cavity, first and second side walls extending respectively from first and second bead regions to a tire tread region. The first and second air tubes are connected to the tire, where each air tube defines an air passage path, each air tube being composed of a flexible operating material to allow a portion of the air tube segment close to an area of contact with the tire ground substantially opens and closes the annular passageway. An inlet regulator device is mounted on the tire, the inlet regulator device having an external duct having a distal end located within the tire cavity, in which the duct has an internal orifice that is in fluid communication with the tire cavity and an internal chamber of the input regulating device; the inner chamber being connected to two opposite passageways in the regulator body which are connected to an inlet end of the first and second air tubes. A pressure membrane is mounted inside the inner chamber of the inlet regulator. A wall of the inner chamber has a flanged end engageable with the pressure membrane, the flanged end surrounding an internal cavity, the inlet regulator having an upper surface and having one or more air holes extending from the upper surface, in that the air holes are in fluid communication with the internal cavity, said insert further comprising two transverse ducts which are in fluid communication with the internal cavity. The annular air tube can be positioned between a region of the tire bead and the tire mounting surface on the rim radially into the tire tread region.
    [006] The invention provides in a fourth aspect an inlet pressure regulator for use with a peristaltic pump on a tire. The regulator includes an inlet regulator device having an external duct with a distal end located inside the tire cavity, in which the duct has an internal orifice that is in fluid communication with the tire cavity and an internal chamber of the tire regulator device. input; the inner chamber being connected to two opposite passageways in the regulator body which are connected to an inlet end of the first and second air tubes, a pressure membrane mounted inside the inner chamber of the inlet regulator device; a wall of the inner chamber having a flanged end engageable with the pressure membrane, where the flanged end surrounds an inner cavity, the inlet regulating device having an upper surface and having one or more air holes extending from the upper surface , in which the air holes are in fluid communication with the internal cavity, said insert further comprising two transverse ducts which are in fluid communication with the internal cavity. Definitions
    [007] "Aspect ratio" of the tire means the ratio of its section height (SH) to its section width (SW) multiplied by 100 percent for expression as a percentage.
    [008] "Asymmetric tread" means a tread that has a non-symmetrical tread pattern over the tire center or EP equatorial plane.
    [009] "Axial" and "axially" means lines or directions that are parallel to the axis of rotation of the tire.
    [010] “Anti-friction lining” is a narrow strip of material placed around the outside of a tire bead to protect the strings from wear and cut against the rim and distribute flexion over the rim.
    [011] “Circumferential” means lines or directions extending along the perimeter of the annular tread surface perpendicular to the axial direction.
    [012] “Central Equatorial Plane (CP)” means the plane perpendicular to the axis of rotation of the tire and passing through the center of the tread.
    [013] "Footprint" means the contact surface or tread contact area of the tire with a smooth surface at zero speed and under normal load and pressure.
    [014] “Inner side” means the side of the tire closest to the vehicle when the tire is mounted on a wheel and the wheel is mounted on the vehicle.
    [015] “Lateral” means an axial direction.
    [016] “Lateral edges” means a line tangent to the contact surface of the tread axially more externally or taken as measured with normal tire load and inflation, the lines being parallel to the central equatorial plane.
    [017] "Net contact area" means the total area of tread elements in contact with the ground between the side edges around the entire circumference of the tread divided by the gross area of the entire tread between the side edges .
    [018] “Non-directional tread” means a tread that has no preferred direction of progressive travel and does not need to be positioned on a vehicle at a specific wheel position or positions to ensure that the tread pattern is aligned with the preferred direction of travel. In contrast, a directional tread pattern has a preferred direction of travel, requiring specific wheel placement.
    [019] “Outer side” means the side of the tire furthest from the vehicle when the tire is mounted on a wheel and the wheel is mounted on the vehicle.
    [020] “Peristaltic” means operating by means of wave-type contractions that propel contained matter, such as air, along tubular pathways.
    [021] “Radial” and “radially” means directions radially to or against the tire's axis of rotation.
    [022] “Reinforcement” means a rubber band extending circumferentially over the tread which is defined by at least one circumferential groove and a second of this groove or a lateral edge, the band being laterally indivisible by grooves of great depth.
    [023] “Transverse grooves” mean small cracks molded into the tread elements of the tire that subdivide the tread surface and increase traction, the transverse grooves are generally track width and closed to the tire tracks, as opposed to grooves that remain open in the tire's footprint.
    [024] “Tread element” or “traction element” means a reinforcement or a block element defined by having adjacent grooves in shape.
    [025] “Tread Arc Width” means the tread arc length as measured between the side edges of the tread. Brief Description of Drawings
    [026] The invention will be described by way of example and with reference to the accompanying drawings, in which: fig. 1 is an isometric view of the tire and rim assembly showing two sets of peristaltic pump.
    [027] Fig. 2 is a side view of the tire of fig. 1.
    [028] Fig. 3A is an enlarged perspective view of the pump outlet mechanism.
    [029] Fig. 3B is a cross-sectional view of the pump outlet mechanism of fig. 3A.
    [030] Figs. 4A and 4B illustrate side views of the tire, rim, hoses and valves showing operation of the pump into the tire cavity when the tire rotates.
    [031] Fig. 5A is a partial section view through the tire.
    [032] Fig. 5B is an enlarged view of the location of the pump tube close to the rim.
    [033] Fig. 6A is a partial section view through the loaded tire and road surface.
    [034] Fig. 6B is an enlarged view of fig. 6A illustrating the tube being compressed in the bead area of the tire.
    [035] Fig. 7 is an enlarged cross-sectional view of the tire assembly and wheel with the pressure regulator shown mounted on the tire.
    [036] Fig. 8 is a perspective view of a pressure regulator.
    [037] Fig. 9 is a top view of the pressure regulator of fig. 8.
    [038] Fig. 10 is an exploded perspective view of the pressure regulator in fig. 8.
    [039] Fig. 11 is an exploded cross-sectional view of the pressure regulator of fig. 8 taken along lines 11-11.
    [040] Fig. 12 is an exploded cross-sectional view of the pressure regulator of fig. 8 taken along lines 12-12.
    [041] Fig. 13A is a cross-sectional view of the pressure regulator of fig. 8 taken along lines 12-12, and shown in the closed position.
    [042] Fig. 13B is a cross-sectional view of the pressure regulator of fig. 8 taken along lines 12-12, and shown in the open position.
    [043] Fig. 14 is a cross-sectional view of the pressure regulator of fig. 8 taken along lines 11-11.
    [044] Fig. 15 is a cross-sectional view of the pressure regulator of fig. 9 taken along lines 15-15. Detailed Description of the Invention
    [045] Referring to figs. 1 and 5, a tire set 10 includes a tire 12, a peristaltic pump set 14 and a tire rim 16. The tire is seated in a conventional manner on a pair of rim seating surfaces 18, 20 located adjacent to external rim flanges 22,24. The outer rim flanges 22,24 have an outer rim surface 26. A rim body 28 supports the tire assembly as shown. The tire is of conventional construction, having a pair of side walls 30.32 extending from external bead areas 34.36 to a crown or tire reading region 38. The tire and rim involve a tire cavity 40.
    [046] As shown in figs. 1, 2 and 4, the peristaltic pump assembly 14 includes a first and second pumps 41, 42 which are mounted on a passageway 43 located in the side wall area of the tire, preferably close to the bead region. The airway is preferably molded on the sidewall of the tire during vulcanization, and is preferably annular in shape. Each pump 41, 42 has a first end 41a, 42a joined by an inlet device 44, and a second end 41b, 42b joined by an outlet device 46. Each pump 41, 42 is comprised of a tube formed of a flexible material resilient, such as plastic, silicone, elastomer or rubber compounds, and is able to withstand repeated deformation cycles when the tube is deformed in a flattened condition subject to external force and, soon after removing this force, returns to its original condition generally circular in cross section. The tube is of sufficient diameter to operatively pass a volume of air sufficient for the purposes described in this document, and to allow positioning of the tube in an operable location within the tire assembly, as will be described. Preferably, the tube has a shape in circular cross section, although other shapes, such as elliptical or lens shape, can be used.
    [047] As shown, the inlet device 44 and the outlet device 46 are spaced approximately 180 degrees apart at each other, forming two 180-step pumps 41, 42. The inlet and outlet devices can be located adjacent to each other, thus forming a single 360-degree pump. Other variations can be used, such as 270 degrees, etc. The outlet device 46 is a connector having a body 47 with a first port 48 that connects to the outlet end 41b of the pump 41. The first port 48 is in fluid communication with the outlet port 52. The outlet port 52 extends into the tire cavity, so that the pump end 41b is in fluid communication with the tire cavity. The outlet device further includes a second port 50 that connects to the outlet end 42b of the pump 42. The second port 50 is connected to an outlet port 54 which is located in the tire cavity, so that the pump end 42 is in fluid communication with the tire cavity. Fig. 3B further illustrates that each outlet end 52, 54 may further comprise a check valve 56.58 to prevent counterflow of air to the pump. The outlet ends 52, 54 of the outlet device 46 extend into the tire cavity, so that the outlet ends are in fluid communication with the inner tire cavity 40.
    [048] Input device 44 is shown in figs. 8-15. The inlet device works to regulate the inlet flow of both pumps 41, 42. The inlet device 44 includes an external cover 45 that can be molded into a green tire and then cured. The cover 45 has two side holes 47 for fluid communication with the inlet of the pump tubes 41, 42, as described in more detail below. The cover further comprises an internal cavity 50 formed by side walls 51 and bottom wall 52. A hole 53 is located in the bottom wall.
    [049] A regulator body 54 is received within the inner cavity 50 of the cover. The regulator body 54 has an external duct 56 with a first end 57 which is connected to the regulator body and a distal end 59 which is received inside the hole 53 of the internal cavity 50. The external duct is dimensioned to be of sufficient length, so that the distal end 59 of the duct is in fluid communication with the tire cavity 40. The first end 57 of the outer duct 56 is connected to an inner chamber 58 which is preferably located centrally within the regulator body 54. A inner chamber 58 has two opposing holes 60 leading to two opposite passageways 62. The passageways 62 are positionable for alignment with the holes 47 located in the cover 45.
    [050] A pressure membrane 64 is received inside the bottom of the chamber 58 and is supported by a rim 65 on the chamber wall 66. The pressure membrane is preferably disk-shaped and formed of a flexible material such as, for example, example, rubber, elastomer, plastic or silicone.
    [051] An insert 68 is positioned in the chamber 58 over the pressure membrane 64. The insert 68 has an upper flanged surface 70 having one or more air holes 74 extending from the upper surface 70 and down through the insert body. 72, so that the outlet air is in fluid communication with the pressure membrane 64. The air holes can optionally include a filter 80. Insert 68 has an internal cavity 76 which is in fluid communication with the pressure membrane. pressure 64, the air holes 74, and two transverse ducts 78 that are transverse or perpendicular to the air orifices 74. The transverse ducts are connected to each side of the inner cavity 76. The inner cavity is surrounded by a flanged portion 77 that can be annular in shape and positioned to engage with the pressure membrane.
    [052] The operation of the inlet pressure regulating device 44 can now be described. The pressure diaphragm detects the pressure in the tire cavity through the pressure in the duct 56 which is in fluid communication with the tire cavity. When the pressure in the tire is high enough, the pressure membrane is sensitive to the pressure in the tire, and if the pressure is high enough, the pressure membrane is forced to engage with the flanged portion of the inner body and sealing the inner cavity 76 through the pressure membrane, as shown in fig. 13A. The pressure membrane settles against the flanged portion 77 of the inner body 68 interrupting the flow to the cavity 76. As the pressure in the tire decreases, the pressure membrane departs from the flanged portion 77, as shown in fig. 13b, and air can flow to air holes 74, and cavity 76. As shown in fig. 15, the air from the cavity enters the transverse ducts 78 and then through the opposite chamber passageways 62, and then through the aligned holes 47 of the outer cover 45 and then to the inlet ends of the respective pumps 41, 42.
    [053] As will be appreciated from fig. 4A, the input device 44 and the output device 46 are in fluid communication with the circular air tube 42, and generally positioned 180 degrees apart. As the tire rotates in a direction of rotation 88, a footprint 100 is formed against the surface of the ground 98. A compressive force 104 is directed at the tire from footprint 100 and acts to flatten a segment 110 of pump 42, as shown in reference number 106. The flattening of segment 110 of pump 42 forces a portion of air located between flattened segment 110 and outlet device 46, in the direction shown by arrow 84, toward outlet device 46.
    [054] As the tire continues to rotate in the 88 direction along the ground surface 98, the pump tube 42 will be sequentially flattened or squeezed segment by segment in a direction 90 that is opposite the direction of rotation of the tire 88. The sequential flattening of the pump tube 42 segment by segment causes the air column located between the flattened segments and the outlet device 46 to be pumped in the 84 direction into the pump 42 to the outlet device 46.
    [055] With the tire rotating in the 88 direction, the flattened pipe segments are sequentially replenished with air 92 flowing to the inlet device 44 along the pump pipe 42 in the 90 direction, as shown in fig. 4A. The inflow of air from the input device 44 in the 90 direction continues until the output device 46 rotates counterclockwise, as shown with the tire rotation 88, passing the tire footprint 100.
    [056] Fig. 4B shows the orientation of the peristaltic pump assembly 14 in this position. In the position shown, tube 41 continues to be sequentially flattened segment by segment opposite the tire footprint by compressive force 104, as shown in reference number 106. Air is pumped clockwise 94 to the inlet device 44, where it is evacuated or discharged. The exhaust air passage 96 from the inlet device 44 is through the internal filter 80, which acts to self-clean the filter of accumulated debris or particles within the porous medium. With the evacuation of pumped air out of the input device 44, the output device is in the closed position and the air does not flow from it into the tire cavity. When the tire additionally rotates counterclockwise 88 until the inlet device 44 passes the tire footprint 100 (as shown in fig. 4A), the air flow resumes to the outlet device 46, causing the pumped air to flow to outside (86) to the tire cavity 40.
    [057] Fig. 4B illustrates that tube 42 is flattened segment by segment as in 102, 1021, 10211, the tire rotates in the 88 direction. Therefore, the progression of squeezed or flattened tube segments can be seen moving in a clockwise direction, against for the tire rotation in the 88 direction. As segment 102 moves away from footprint 100, the compressive forces within the tire from the footprint region are eliminated, and segment 102 is free to resiliently reconfigure itself in a state not flattened, as segment 102 is replenished with air from passageway 43. In the original non-flattened configuration the segments of tube 42 are generally circular in section.
    [058] The cycle described above is then repeated for each tire revolution, half of each rotation resulting in pumped air going into the tire cavity, and half of the rotation of the pumped air is directed back out of the input device to self-cleaning the filter. It will be appreciated that although the direction of rotation 88 of the tire 12 is shown in figs. 4A and 4B as being counterclockwise, the particular tire set and its peristaltic pump set 14 will operate in the same direction in the opposite direction of rotation (clockwise) as shown by reference number 88. The peristaltic pump is therefore bi -directional and equally functional with the tire set moving in a progressive or regressive direction of rotation.
    [059] The location of the peristaltic pump set will be understood from figs. 5-6. In one embodiment, the peristaltic pump assembly 14 is positioned on the tire sidewall, radially out from the surface of the rim flange 26 in the anti-friction lining 120. Thus positioned, the air tube 42 is radially into the tire footprint 100 and is thus positioned to be flattened by forces directed from the tire's footprint, as described above. The segment 110 which is opposite footprint 100 will flatten out from the compressive force 114 from footprint 100 by compressing the pipe segment against the surface of the rim flange 26. Although the positioning of pipe 42 is specifically shown as between a antifriction lining 120 of the tire in the bead region 34 and the rim surface 26, it is not limited to the same, and can be located in any region of the tire, such as anywhere on the sidewall or tread. The diametric dimensioning of the air tube of the peristaltic pump 42 is directed to extend from the circumference of the surface of the rim flange 26.
    [060] From the foregoing, it will be appreciated that the particular invention provides a bidirectional peristaltic pump for a self-inflating tire, in which a circular air tube 42 flattens out segment by segment and closes in the tire footprint 100 The air inlet device T 44 may include a filter 80 and be self-cleaning. The peristaltic pump assembly 14 pumps air in the rotation of the tire, in each direction, half a revolution pumping air into the tire cavity 40 and the other half a revolution pumping air back out of the input device 44 (filter 80). The peristaltic pump assembly 14 can be used with a conventional tire pressure monitoring system (TPMS) (not shown) of conventional configuration that serves as a system failure detector. TPMS can be used to detect any failure in the tire set's auto-inflation system, and alert the user to this condition.
    [061] Variations in the present invention are possible in light of its description provided in this document. Although certain representative embodiments and details have been shown for the purpose of illustrating the particular invention, it will be apparent to those skilled in the art that various changes and modifications can be made to it without departing from the scope of the particular invention. It is, therefore, to be understood that changes can be made in the particular modalities described that will fall within the full intended scope of the invention, as defined by the attached claims below.
    权利要求:
    Claims (3)
    [0001]
    1. Self-inflating tire FEATURED for comprising: a tire cavity (40); first and second side walls (30, 32) extending respectively from the first and second tire bead regions (34, 36) to a tire tread region (38); a first and a second air tube connected to the tire, where each air tube defines an air passage; and an airway (43) operative to allow a portion of the airway (43) close to an area of contact with the tire ground (100) to open and close the airway (43) ), an inlet regulator device (44) mounted on the tire (12) and comprising a regulator body (154), the regulator body (154) having an inner chamber (158) and an outer duct (158) having an end distal located inside the tire cavity (40), where the duct (158) has an internal orifice through it in fluid communication with the tire cavity (40) and with said inner chamber (158), in which the regulating device inlet (44) is connected to an inlet end of the air passage (43); wherein a pressure membrane (64) is mounted within the inner chamber (158) of the regulator body (154); wherein the pressure membrane (64) has a first side in fluid communication with the tire cavity (40) and a second side in fluid communication with an external air pressure; wherein the inlet regulator device (44) further includes two opposite passages (62) in the regulator body (154) which are connected to an inlet end of the first and second air tubes, and in which the inlet regulator device ( 44) comprises an insert at least partially assembled within the inner chamber (158) of the regulator body (154), the insert (68) having a flanged end surrounding an internal cavity or having a potion in which the flanged end or portion it can be connected with the pressure diaphragm (64); and where the pressure membrane (64) is responsive to a cavity tire pressure and external air pressure and where the pressure membrane (64) is positioned to engage with the distal end of the regulator body (154) when the tire pressure reaches a set value to open and close the inlet regulator device (44) to allow or prevent air flow from entering the inlet regulator device (44).
    [0002]
    2. Self-inflating tire, according to claim 1, CHARACTERIZED by the fact that the insert (68) is mounted on the regulator body (154) forming the inner chamber (158) and is positioned in the inner chamber (158) on the membrane pressure (64).
    [0003]
    3. Self-inflating tire according to claim 1, CHARACTERIZED by the fact that the insert (68) has one or more air holes (74) that are in fluid communication with the internal cavity (40).
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    法律状态:
    2013-11-12| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-29| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-08-04| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-08| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 29/08/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/221,231|2011-08-30|
    US13/221,231|US8857484B2|2011-08-30|2011-08-30|Self-inflating tire|
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