[특허]Stem and disc seal construction for butterfly valves

Stem and disc seal construction for butterfly valves 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16K-001/228
출원번호	US-0068757 (1987-06-26)
발명자 / 주소	Iff Rene (Bern CHX)
출원인 / 주소	Neotecha AG (Hombrechtikon CHX 03)
인용정보	피인용 횟수 : 20 인용 특허 : 0

초록 ▼

A butterfly type valve has a closure disc with opposed trunnions or support stem portions for rotatably supporting the closure disc in a valve body which is bored to receive respective sets of circular disc type springs urging seal faces on a body liner into engagement with cooperating annular seal faces formed on an overmold resilient plastic layer on the closure disc. The closure disc outer layer is formed of PFA or PVDF type plastic and the body liner of PTFE type plastic, respectively to eliminate cold fusion when the closure disc is forcibly engaged with a seat surface formed by the liner. The closure disc layer includes a portion filling an undercut groove in the closure disc stems which is cooperable with a cylindrical collar formed on the liner and a backup seal to further seal the stem portions from exposure to the fluid flowing through the valve or the environment in which the valve is disposed.

대표청구항 ▼

A butterfly type valve comprising: a body defining a flow passage and having at least one transverse bore formed therein; a closure disc disposed in said flow passage with a stem on said disc being received in said transverse body bore; a resilient body liner having an integral collar portion extending to an end and including a central bore disposed in said transverse body bore for receiving said stem; said closure disc being rotatably supported in said body by said stem for movement between open and closed positions with respect to said body flow passage; a layer of resilient material covering said closure disc and at least a portion of said stem, said layer of resilient material covering said portion of said stem forming a cylindrical collar interfitting with said collar portion of said liner and defining a first annular seal surface extending about said stem portion; said resilient body liner defining a second annular seal surface extending about said stem portion and engageable with said first annular seal surface for cooperatively effecting a sealed relation about said stem relative to said flow passage; an annular substantially inelastic plug independent of said body liner and said disc layer loosely disposed in said body bore about said collar portion, said annular plug including a surface extending closely about said liner collar portion and a central bore with a radial shoulder formed at an intermediate location therein and an annular seal disposed between said shoulder and the end of said liner collar portion; and at least one circular disc spring disposed compressed in said body bore for biasing said plug into engagement with said body liner to impose substantially all of the available compressive force thereof against said first annular seal surface for urging said seal surfaces into engagement with each other to form a seal between said surfaces.

이 특허를 인용한 특허 (20)

Timko, Jared S.; Lippucci, Thomas A.; Kvarda, Eric M.; Fry, Brandon J.; Gotch, James E., Ball valve packing.
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Zwick, Johann, Butterfly valve.
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Crochet, Sr., Kevin W.; Eger, Norman; Rovira, III, Sidney A., Butterfly valve and stem sealing assembly.
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Casillas, Larry Robert; Kesner, Ed; LaBenz, Joel; McGinty, Mitch, Butterfly valve assembly incorporating a unitary shaft and butterfly plate valve element.
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Stefani, Yves; Lucotte, Roland, Butterfly valve with a rigid seal.
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Stefani, Yves; Lucotte, Roland, Butterfly valve with a rigid seal.
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Alajbegovic, Vahidin; Ring, Lev, Drilling head with non-rotating annular seal assembly.
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Brown Robert Joseph ; Mabery William John ; Gentry Harold Taylor ; McDermott Gerald Patrick, High performance butterfly valve.
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Kamp, Josh; Army, Donald E., High temperature shaft seal for bleed valve with roller bearings.
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Kamp, Josh; Army, Donald E., High temperature shaft seal for bleed valve with roller bearings.
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Brinks, Barry T.; Pollock, Shawn Justin, Low torque, high flow and tight sealing tube butterfly valve.
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Timko, Jared S.; Lippucci, Thomas A.; Kvarda, Eric M.; Fry, Brandon J.; Gotch, James E., Method of assembling a ball valve.
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Evans David M., Multiple-bore throttle valve having central shaft end-play restraint.
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Stefani, Yves; Lucotte, Roland, Pipe coupling.
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Stefani, Yves; Lucotte, Roland, Pipe coupling.
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Crochet, Sr., Kevin W.; Eger, Norman; Rovira, III, Sideny A., Plug valve and stem sealing assembly.
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Brouwer Douglas J. (Sheboygan WI), Self-adjusting bearing.
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DeLeon Arthur P., Sound dampening duct damper.
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Laulhe Rene,FRX ; Guiroy Patrick,FRX ; Garrigues Jean-Claude,FRX ; Dubois Jean-Paul,FRX ; Wattignier Claude,FRX, Valve device.
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Weidner, Thomas; Weinert, Rico; Schinko, Alexander; Womann, Marcel; Reichling, Karlheinz, Valve flap device.
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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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연합인증

Stem and disc seal construction for butterfly valves 원문보기

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Stem and disc seal construction for butterfly valves 원문보기

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이 특허를 인용한 특허 (20)

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