[특허]Single axis three way selector valve for endoscopes

Single axis three way selector valve for endoscopes 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61B-001/00
출원번호	US-0008788 (1993-01-22)
발명자 / 주소	Pearlman Marshall B. (Los Angeles CA) Jones Eric M. (Los Angeles CA)
출원인 / 주소	Karl Storz Endoscopy America, Inc. (Culver City CA 02)
인용정보	피인용 횟수 : 50 인용 특허 : 0

초록 ▼

A single axis three way valve for endoscopes. The valve has a repose, closed setting and two active settings. In one active setting, a common port to the endoscope is connected to suction, and in the other active setting it is connected to a source of irrigation liquids. The valve has two spools, one of which is connected to a finger pad for actuation, and which is spring-loaded to a closed position. The other spool is spaced from the first, and also is spring-loaded closed . The first valve is opened by initial movement. Further movement closes its port and abuts the other spool to open its respective port.

대표청구항 ▼

A single axis three way selector valve for connecting a common channel to one or the other of two sources, or to neither source, comprising: a valve body having said common channel, and a valve bore having a linear axis and a cylindrical wall; a common port interconnecting said valve bore and said common channel, a first source port and a second source port both passing into the body and opening into said valve bore, one on each axial side of the common port; a first valve spool on the same axial side of the common port as the first source port, a pair of peripheral sliding seals around said first valve spool axially spaced apart so as to span said first source port in the rest position of said first valve spool, first spring bias means pressing said first valve spool toward said rest position, and stop means on said body and said first valve spool limiting the movement of said first valve spool toward said common port to said rest position, and contact means on said first valve spool; a second valve spool on the same side of the common port as the second source port, two pairs of peripheral sliding seals around said second valve spool axially spaced apart from one another, a peripheral inlet relief in the surface of said second valve spool between the adjacent seals, one from each pair, said seals being so disposed and arranged that adjacent ones of said seals can span said second source port, a flow passage in said second valve spool interconnecting said peripheral inlet relief and the valve bore, by-passing one of said pairs of seals, a second spring bias means pressing said second valve body toward a rest position farthest removed from said common port where it closes said second source port, and stop means on said body and said second valve spool limiting the movement of said second valve spool away from said common port to said rest position, and contact means on said second valve spool, said contact means being spaced apart sufficiently to permit said second valve spool to more from its rest position to open said second source port, thereafter to engage and upon further axial movement also to move said first valve spool to open said first source port and close said second source port, said common port always being open.

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Single axis three way selector valve for endoscopes 원문보기

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Single axis three way selector valve for endoscopes 원문보기

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