Pneumatic control valve apparatus

Motors: expansible chamber type – With motive fluid valve – Relatively movable inlet and exhaust valves for single...

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Details

91461, 13759615, 13759616, 1375962, 13762518, F15B 13043

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active

050386700

ABSTRACT:
An improved pneumatic control valve apparatus which uses poppet valves as the primary valve components. The poppets are in a pair of poppet valve assemblies, each assembly containing a pair of spaced poppets on a shiftable shaft biased in one direction to cause the poppets to close respective valve seats and to open the valve seats when the shaft moves in the opposite direction. A roller diaphragm is used to couple the shaft to an adjacent support of the assembly. As the shaft moves in the opposite direction against a bias force, the roller diaphragms of each assembly flex in a rolling action to coordinate the movements of the poppets and the shaft. The poppets will simutaneously open their respective valve seats so that the same amount of fluid will flow through the valve seats and thereby assure precision movements of the shiftable parts of the work-producing device with which the poppet valve assemblies are coupled. The poppet valve assemblies of the present invention can be controlled by a control unit, such as a piezoelectric transducer operable as a function of the polarity and magnitude of a voltage applied to the transducer.

REFERENCES:
patent: 2393805 (1946-01-01), Parker
patent: 3580281 (1971-05-01), Petersen
patent: 3587640 (1971-06-01), Hanser
patent: 3794075 (1974-02-01), Stoll et al.
patent: 3878765 (1975-04-01), Walters et al.
patent: 3884266 (1975-05-01), Kondo
patent: 3906980 (1976-09-01), Hanser
patent: 3924656 (1975-12-01), Hanser et al.
patent: 4083381 (1978-04-01), McClocklin et al.
patent: 4516604 (1985-05-01), Taplin
patent: 4523513 (1985-06-01), Gudat et al.
patent: 4535810 (1985-08-01), Duder et al.

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