[특허]Zero clearance anti-extrusion rings for containment of PTFE packing

Zero clearance anti-extrusion rings for containment of PTFE packing 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16J-015/20 F16L-021/04 B65D-053/02
출원번호	US-0596225 (1990-10-12)
발명자 / 주소	Hutchens Wilbur D. (Marshalltown IA)
출원인 / 주소	Fisher Controls International, Inc. (Clayton MO 02)
인용정보	피인용 횟수 : 26 인용 특허 : 0

초록 ▼

A packing containment assembly for sealing an operating member such as a shaft or stem in a fluid control valve, particularly where PTFE packing is used. A pair of zero clearance anti-extrusion rings of PEEK material are mounted in the shaft with the PTFE packing therebetween. Each ring has an inner diameter slightly less than the shaft outer diameter to form an interference fit. The rings are split with a scarf cut to provide an overlapping joint and enable mounting of the rings on the operating member. A male adapter PEEK ring matches a V-type female packing ring which significantly reduces the amount of PTFE packing needed for a reliable seal. A step cut PEEK zero clearance anti-extrusion ring could be used as well as a fractured carbon ring.

대표청구항 ▼

A packing containment assembly for sealing an operating member in a housing with fluid, said assembly being subjected to changing thermal conditions and comprising: polymer packing surrounding and in fluid sealing engagement with said operating member and said housing to inhibit fluid from leaking around said operating member, said polymer packing moving axially on said operating member in response to said changing thermal conditions; loading means for exerting and maintaining a load on said polymer packing; and restraining ring means for permitting said polymer packing to expand and contract axially in response to said changing thermal conditions while, (a) enabling said loading means to follow said polymer packing axial movement during said changing thermal conditions to maintain said fluid sealing engagement, and (b) inhibiting extrusion of said polymer packing, said restraining ring means including, a pair of zero clearance anti-extrusions rings mounted on said operating member with a respective ring on each opposite end of said polymer packing being subjected to said loading means, each of said rings including, (1) an inside diameter slightly less than the outside diameter of said operating member to form an interference fit between said ring and said operating member to prevent extrusion of said polymer packing between said inner diameter and the operating member, (2) an outside diameter slightly less than the inside diameter of said housing sufficient to enable free axial movement of said ring outer diameter with respect to said housing and enable said loading means to follow any movement of said polymer packing in response to said changing thermal conditions, and (3) ring splitting means through said ring circumference for enabling mounting of said ring on said operating member and enabling free axial movement of said ring inner diameter with respect to said operating member so that said loading means can follow any movement of said polymer packing in response to said changing thermal conditions.

이 특허를 인용한 특허 (26)

Griffin, Daniel; Lytle, Demetrius, Anti-extrusion packing support.
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Edwards Charles N., Anti-extrusion seal.
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Foote, Dean Norman, Bearing stack for a down-hole drilling motor.
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Wears William E. ; Wood Charles W. ; Putman Karl F., Bushing-less stem guided control valve.
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Taylor, James E.; Hertel, Milton R., Dynamic seal assembly.
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Chase, Randy L.; Dole, Douglas R.; Thau, Jr., Lawrence W.; Biery, Wayne M.; Madara, Scott D.; Kuehner, Ryan D., Expansion joint for pipelines.
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Nicholson, Spencer Andrew; Tomlinson, Justin Charles; Sroka, Jacek; Weinle, Matthew, Low emission valve assembly.
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Lovell, Michel Ken; Grabau, Ted Dennis, Low friction live-loaded packing.
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Lovell Michel K. (Marshalltown IA) Jackson Randall S. (Marshalltown IA) Brestel Ronald R. (Marshalltown IA), Low friction packing.
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Rowe, Gordon; Bierut, Kermit, Metal chevron axial seal.
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Rasinski, Michael J.; Gore, Robert; Whitener, Randy Edward, Radial lead seal assembly for a generator and a radial lead seal assembly of a generator.
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Rasinski, Michael J.; Gore, Robert; Whitener, Randy Edward, Radial lead seal assembly for a generator and method incorporating the same.
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Yaniero Robert A. ; Pressley Jack, Reciprocating tool having a piston retainer.
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Yoshiyuki Abe JP, Resin seal ring die with various mold cut portions.
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Lewis, Steven Alan, Scarf cut backup rings.
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Abe Yoshiyuki,JPX, Seal ring.
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Bradshaw, Richard S.; Slay, Jeremy Buc, Seal ring backup devices and methods for preventing extrusion.
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Hobbs, Kenneth Donald; Jerman, Robert Edward; Wolanski, Charles Edward, Self sealing membrane contactor with PTFE tubular membranes.
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Sugita, Yasunori; Yamashita, Yoshihiro, Shaft seal packing and shaft seal structure for valve.
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Gugala Zbigniew H. (Spring Grove IL) Loman Lawrence J. (Oak Lawn IL) Scapes John N. (Schaumburg IL), Stem seal configuration for ball valves.
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Stafford, Maura Jane, Torque converter clutch apply valve.
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Stafford,Maura Jane, Torque converter clutch apply valve.
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McCarthy, Lisa, V-pack seal and method for sealing a shaft.
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Faas, Wayne R.; Grabau, Ted D.; Barron, Kimball R., Valve plug seal assembly.
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Newlands, Nick; Säfvenberg, Olle; Dahlborg, Bengt; Møgedal, Øystein, Valve stem seal arrangement.
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Pittman Gary Mack ; Senior Kenneth Alan ; Strunk John Neal ; Thondukolam Krishnan Ramalingam, Valve with perfluoroelastomer packing.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Zero clearance anti-extrusion rings for containment of PTFE packing 원문보기

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Zero clearance anti-extrusion rings for containment of PTFE packing 원문보기

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이 특허를 인용한 특허 (26)

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