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公开(公告)号:US3578020A
公开(公告)日:1971-05-11
申请号:US3578020D
申请日:1968-08-20
Applicant: BECKMAN INSTRUMENTS INC
Inventor: ROCHTE JERRY E , MCDAVID LARRY S
CPC classification number: F16K15/142 , F04B53/1075 , Y10T137/7838 , Y10T137/7889
Abstract: A check-type valve assembly in which an annular channel is formed in a valve body. A port is formed in the inner surface of the channel and is closed by an elastic band which is positioned under tension in the channel so as to bear tightly against the inner surface thereof. The elastic band functions as a valve element for controlling the flow of fluid through passages communicating with said port and the annular channel.