[특허]Magnetic flux-shifting fluid valve

Magnetic flux-shifting fluid valve 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16K-031/08 H01F-003/12
출원번호	US-0264365 (1981-05-18)
발명자 / 주소	Fisher Richard T. (Pembroke MA)
출원인 / 주소	Taplin John F. (Newton MA 04)
인용정보	피인용 횟수 : 62 인용 특허 : 0

초록 ▼

A magnetic flux-shifting or magnetic latch valve includes a first flux path including a first permanent magnet having a large coercive force so that its polarity cannot readily be altered. It further includes a second flux path including a second permanent magnet having a small coercive force so that its polarity can be altered. A valve according to this invention further includes a d-c source and a winding energized by said d-c source for altering the polarity of said second magnet. The fluid valve includes a valve element and a valve seat cooperating with the valve element. The valve has two limit positions, i.e. fully open and fully closed. In the fully closed position the pole surfaces of magnetic flux paths have the same magnetic polarity and hence do not attract each other permitting gravity, spring or hydrostatic means to form a gap therebetween. However, in the fully open position the pole surfaces of the magnetic flux paths have opposite magnetic polarities and hence attract each other, closing the aforementioned gap. To put it in other words, in the fully open position of the valve, the two magnets of the valve establish two parallel flux paths, while in the closed position of the valve the magnetic flux paths of both magnets are in series. The above structure makes it possible to operate the valve by mere d-c pulses, thus distinguishing from flux-shift valves that require sustained currents for maintaining the valve in one of its limit positions.

대표청구항 ▼

A magnetic flux-shifting valve having two different positions to control the paths of the flow of a fluid, said valve comprising (a) a pair of relatively movable fluid-flow control parts including a valve element and a valve seat cooperating with said valve element; (b) means for biasing said valve element away from said valve seat; (c) a first fixed permanent magnet having a relatively large coercive force; (d) a first soft iron member in physical engagement with one pole surface of said first magnet; (e) a second soft iron member in physical engagement with the other pole surface of said first magnet; (f) a pair of cooperating pole pieces of soft iron capable of forming a working gap therebetween, said pair of pole pieces including a movable pole piece and a fixed pole piece, said valve element being integral with said movable pole piece and said valve seat being integral with said fixed pole piece; (g) said first magnet establishing a first closed flux path in the first position of said flux-shifting valve including one pole surface of said first magnet, said first soft iron member, said movable pole piece, said second soft iron member, and back to the other pole surface of said first magnet; (h) a tubular soft iron member defining a fluid passageway jointly with said valve seat; (i) a casing of soft iron forming a cavity for housing a flux-shifting electromagnet, said casing extending from the end of said tubular member opposite said fixed pole piece to said first magnet; (j) a second fixed permanent magnet having a relatively small coercive force in comparison to said first magnet, said second magnet being supported by said tubular member which forms said fixed pole piece on one end of said second magnet, said second magnet establishing in said first position of said flux-shifting valve a second closed flux path separate from said first flux path except for the portion of said second flux path in said second soft iron member, said second flux path including one pole surface of said second magnet, a portion of said tubular member, said fixed pole piece, said second soft iron member, said casing, another portion of said tubular member, and back to the other pole surface of said second magnet; (k) an electromagnet in said casing for reversing the polarity of said second magnet to establish said second fluid control position of said flux-shifting valve wherein the fluxes of said first magnet and said second magnet are in series and the single closed flux path of said first magnet and said second magnet include a pole surface of said second magnet, a portion of said tubular member, said casing, said first magnet substantially excluding said second soft iron member, said first soft iron member, said movable and said fixed pole piece, another portion of said tubular member, and back to the other pole surface of said second magnet; and (l) fluid passage means defined by the space between said first magnet and said movable pole piece for admitting fluid to said valve seat when said valve element is separated from said valve seat.

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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

Magnetic flux-shifting fluid valve 원문보기

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Magnetic flux-shifting fluid valve 원문보기

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대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (62)

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