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热词
    • 24. 发明授权
    • Dripless valve
    • 无级阀
    • US4516702A
    • 1985-05-14
    • US447154
    • 1982-12-06
    • Robert W. Schmidt
    • Robert W. Schmidt
    • B05C5/02F16K31/40B05B1/28
    • F16K31/408B05C5/0225
    • A valve for applying a flowable material in which it is desired to provide a sharp cutoff in application of the material includes a valve body with a chamber therein in communication with a source of the material to be applied. A movable piston is positioned within the valve body and there is a passage in the piston opening to the chamber with the passage terminating in an application opening. A movable valve stem is positioned to open and close upon the passage chamber opening to control the flow of material to the passage and application opening. A negative pressure is created at the application opening at or immediately after closure of the valve stem upon the passage chamber opening to thereby provide a sharp cutoff in the application of the material from the opening.
    • 用于施加其中希望在施加材料时提供尖锐切割的可流动材料的阀包括具有与待施加材料的源连通的室中的阀体。 可移动活塞位于阀体内,并且在活塞开口处具有通道,通道终止于应用开口中。 可移动阀杆定位成在通道室开口处打开和关闭,以控制材料流向通道和施加开口。 在通道室开口处的阀杆关闭之后或之后立即在施加开口处产生负压,从而在从开口施加材料时提供尖锐的切断。