• 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:
    A seal 1 is fitted over the front end of a piston 4 to define a cavity 6 between the seal 1 and the front face 5 of the piston. In use, fluid pressure on the front face of the seal 1 causes deformation of the forward part 2 of the seal to effect radial expansion of the seal. Owing to its shape and material it is made of, the seal ensures a variable sealing thrust on a surrounding cylinder proportional to the pressure acting on the piston, thus enhancing the useful life of the seal. The cavity 6 may be filled with gas or solid, elastic material. <IMAGE>
    公开号:SU715871A1
    申请号:SU782644100
    申请日:1978-08-04
    公开日:1980-02-15
    发明作者:Возка Станислав；Кубин Мирослав；Порш Бедрих；Шпачек Павел；Вослар Ярослав
    申请人:Ческословенска Академие Вед (Инопредприятие)；
    IPC主号:
    专利说明:

    (54) PISTON SEAL
    The invention relates to a sealing technique and can be applied in pumps, metering devices or KOivinassors.
    Piston seals are known in the form of piston rings made of an elastic material expanding from the pressure of the medium 1.
    These consolidations - insufficiently protect the piston during the work with hostile environment.
    The purpose of the invention is to increase the e-operating reliability of the seal. . ,
    For this, the end part of the proposed piston is closed with a cap-shaped sealing element, with a cavity between the end of the piston and the sealing element that can fill with a gas or elastic substance. In the BepxHeJ part of the piston there is a groove for mounting the sealing element whose outer diameter can be equal to or greater than the cylinder diameter to 5%. In addition, the end part of the sealing element is thickened in the middle part. Sealing
    the element can be fastened to the piston using threaded connections.
    FIG. 1 depicts the described seal; in fig. 2 shows a seal version with a threaded joint; in fig. 3 shows a variant of fastening the seal with a screw.
    The piston seal is a sealing element 1, made of polytetrafluoroethylene,. with face part 2 and side walls 3, with which the sealing element is mounted on a piston of 4 g between the end part, part 5 of the piston and
    5 element 1 forms a cavity A. Tortsova part 2 of element 1 in the middle can have a thickening. On the side wall 3 is a projection b, corresponding to the groove 7 on the piston,
    0
    The sealing element 1 can be attached to the piston by a threaded connection (Fig. 2), for which a cutting 9 is made at the end 8 of the Viv piston wall.
    five
    权利要求:
    Claims (8)
    [1]
    The sealing element 1 (Fig. 3) may have a spherical shape with a decrease in the area from the center to the periphery. The piston is made hollow and has a screw cut 10. 3 -------- The head 11 of which presses the sealing element to the inner wall 12 of the recess 13, which is made in the piston. When the piston is moving to compress the 6pc6 medium, part 2 bends; as a result, the diameter of the sealing element increases and the pressure is pressed against the piston. When the piston reverses, the front part 2 assumes the initial shape and the pressing force decreases. This contributes to an increase in the durability of an uplrtnitelno element,. ,,, ,: When operating at 611 pressure, pressure A can be filled with an elastic material, such as rubber, plastics or gases. For the manufacture of the sealing element, an elastic material with a low yield strength should be used. for example, fluoroplast, nylon, propi. which possess high resistance against aggressive liquids. Sealing element made of rubber for work, only with certain liquids ... , , The formula is. One-way operation with expansion of the sealing ring due to the pressure of the medium, characterized in that, in order to increase operational reliability, the front part of the piston is closed with a sealing element in-shape; a cap, - a cavity is formed between the end part of the piston and the sealing element, and the top part of the piston is made -, --- --- d-- - - to fasten the sealing element
    [2]
    2. The seal according to claim 1, p t l is due to the fact that the outer diameter of the reinforcing element is equal to or up to 5% greater than the inner diameter of the cylinder.
    [3]
    3. Compaction according to claim 1, in which the / that the cavity between the piston and the sealing element is filled with gas or an elastic substance. . ,
    [4]
    4. Seal according to claim 1, of t l ich a y it. By the fact that the front part of the sealing element is thickened in its middle part.
    [5]
    5. Sealing according to claim 1, about the fact that the groove is made in the cylindrical part of the piston. and the corresponding opposite side of the side wall of the sealing element is provided with a protrusion.
    [6]
    6. Seal under item 1, that is, the fact that the piston and the inner surface are tight. :. the body element is threaded,
    [7]
    7. A seal according to Claim 1, characterized in that the end portion of the piston is provided with a cone-shaped expanding recess in which the screw head is located, the lateral surface of which in shape and size corresponds to the inner surface of the sealing member.
    [8]
    8. Sealing pr p. 1, of l isch and y. stitching it in that the sealing element is made of elastic polymeric organic matter. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 337600, cl. F 16 7 15/26, 1970.
    类似技术:
    公开号 | 公开日 | 专利标题
    US4040636A|1977-08-09|Composite packing
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    US2814540A|1957-11-26|Piston packing
    US3369411A|1968-02-20|Accordion type pump rod seal
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    US2612419A|1952-09-30|Piston sealing assembly
    US3990729A|1976-11-09|End fitting for hoses
    US4303250A|1981-12-01|Sealing in an adapter for available sealing grooves
    GB2073845A|1981-10-21|Improvements in and Relating to Piston Seals
    US4048909A|1977-09-20|Piston ring
    KR850006575A|1985-10-14|Filling device for shock absorber
    CN2168996Y|1994-06-15|Assembled sealing ring
    US4279573A|1981-07-21|High pressure pump
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    SU859731A1|1981-08-30|Piston seal for pneumatic and hydraulic apparatus
    JP3197850B2|2001-08-13|Sealing material for cylinder
    FR2404768A1|1979-04-27|SPRING ACCUMULATOR CYLINDER, ESPECIALLY FOR ROAD VEHICLE BRAKES
    JPH03223570A|1991-10-02|Rod seal member
    SU877196A1|1981-10-30|Valve apparatus locking pair
    JPH07317911A|1995-12-08|Packing for piston
    SU667743A1|1979-06-15|O-seal
    SU1196587A1|1985-12-07|Flange joint seal
    同族专利:
    公开号 | 公开日
    SE7808375L|1979-02-06|
    GB2002493B|1982-03-03|
    FR2399591B3|1981-05-08|
    DE2833916A1|1979-02-15|
    GB2002493A|1979-02-21|
    CS197622B1|1980-05-30|
    DD138352A1|1979-10-24|
    US4196909A|1980-04-08|
    FR2399591A1|1979-03-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2140778A|1937-07-24|1938-12-20|Bendix Prod Corp|Hydraulic brake|
    US2895773A|1956-10-22|1959-07-21|Robert K Mcconnaughey|Variable diameter tensed ring piston|
    DE1180202B|1961-02-08|1964-10-22|Louis Nogier|Double-acting sealing sleeve for pistons, especially for pistons of plastic syringes|
    FR2178826B1|1972-04-04|1977-04-01|Sedat Etu Applic Tech|DE19624346C2|1996-03-29|1998-12-10|Schulte Tengler Gmbh|High pressure sealing|
    US6511493B1|2000-01-10|2003-01-28|Hydrocision, Inc.|Liquid jet-powered surgical instruments|
    WO2002095234A1|2001-04-27|2002-11-28|Hydrocision, Inc.|High pressure pumping cartridges for medical and surgical pumping and infusion applications|
    JP2004537380A|2001-08-08|2004-12-16|ハイドロシジョン・インコーポレーテッド|Medical device with high-pressure quick-separation handpiece|
    US20120282409A1|2011-05-03|2012-11-08|Emerson Climate Technologies, Inc.|Recycled nylon materials for use in refrigeration systems|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CS775187A|CS197622B1|1977-08-05|1977-08-05|Piston packing of the pressure device|
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