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Trosch Paul: Remotely or manually operable membrane valve. Georg Fischer Aktiengesellschaft, Flynn & Frishauf, April 9, 1974: US3802462 (73 worldwide citation)

A housing has a membrane stretched thereacross, the membrane being deflectable towards a flow opening which has an intermediate separating ridge; when the membrane is deflected against the separating ridge, flow communication through the flow opening is interrupted. This deflection can be effected e ...


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Smith Larry S: Pneumatic control system and pneumatic control device therefor or the like. Robertshaw Controls Company, January 11, 1972: US3633605 (62 worldwide citation)

A pneumatic control device comprising two cup-shaped housing members respectively having open ends and end wall means recessed from the respective open ends thereof, each end wall means having an inlet therein and a valve seat surrounding the respective inlet and projecting beyond its respective end ...


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Elmer P Kiser PO Box 883 1531 Main St, 94558: Air loaded valve. George B White, September 5, 1972: US3689025 (57 worldwide citation)

In a casing is a cell filled with predetermined air pressure constantly, one wall of the cell is a rubber diaphragm which is pressed by the air pressure in the cell against a valve stem, the valve on which bears against a second diaphragm for closing the opening of the valve seat of a conduit. The s ...


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Kelly Samuel T: Pressure regulator. Robertshaw Controls Company, December 18, 1973: US3779274 (43 worldwide citation)

A pressure regulator including a housing having inlet and outlet ports and a valve seat communicating with the inlet port, a flexing member mounted in the housing to form a chamber therein and a cover press fitted in the housing to retain the flexing member and having an annular fulcrum engaging the ...


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Coiner Ronald W, Vutz Norman: Drain valve device. Westinghouse Air Brake Company, May 2, 1972: US3659625 (36 worldwide citation)

A drain valve in which a diaphragm separates a supply chamber from an exhaust chamber, both chambers being connected in common with a reservoir, and including a Bellville spring normally biasing the diaphragm in a preselected one of an open or closed position relative to an exhaust port. In one embo ...


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Kingsford Kenji A, Nguyen Hy Ba: Improved diaphragm valve with leak detection. Furon Co, January 20, 1999: EP0892204-A2 (35 worldwide citation)

A valve assembly comprises a valve body and at least one valve seat is disposed within the valve body. A groove is disposed therein concentrically around the valve seat. A poppet assembly is disposed within the valve body and comprises an imperforate valve stem and a valve plug at an end of the valv ...


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Robert K Little: Diaphragm valve assembly and method of making same. RKL Controls, Howson and Howson, January 19, 1971: US3556465 (34 worldwide citation)

A diaphragm valve having an annular valve seat and a spaced opposed valve assembly comprising a fabric-reinforced elastic diaphragm capsule molded around a metal supporting disc. Low pressure fluid is selectively introduced within the elastic capsule to resiliently expand the capsule toward the valv ...


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Usui Minoru, Kobayashi Takao, Shinada Satoshi, Miyazawa Hisashi, Naka Takahiro: Diaphragm valve unit for ink cartridge and supply needle of inkjet recording apparatus. Seiko Epson, September 23, 1998: GB2323332-A (32 worldwide citation)

The valve unit includes a thin elastic diaphragm valve 6 that operates in response to pressure differences between an upstream and downstream side of the diaphragm. The valve is formed from a lamination material comprising a metal plate and a macromolecular film which has been subject to plastic def ...