Electro/pneumatic proportional valve

Details Electro/pneumatic proportional valve Electro/pneumatic proportional valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/81

F16K 31/06 (2006.01) B62D 5/06 (2006.01) B62D 5/10 (2006.01) F16K 31/124 (2006.01)

Patent

CA 1259882

ABSTRACT An Electro/Pneumatic Porportional Valve An electro/pneumatic proportional valve having a housing defining an upper and lower chamber separated by an annular web. An inlet port and exhaust port concentric with the annular web are provided in said lower chamber while an outlet port is provided in the upper chamber. An exhaust cylinder is resiliently disposed through the exhaust port and has a radial flange engaging said annular web to occlude the annular web's central opening. The exhaust cylinder also has an axial bore passing therethrough and existing through the exhaust port. A piston disposed in the upper chamber has a pintle which is operative to engage the exhaust cylinder with the displacement of the piston and occlude the exhaust cylinder's axial bore. Pilot valves are provided to pressurize the upper chamber in response to a pulse train signal displacing the piston towards the web. The displacement of the piston causes the pintle to engage the exhaust cylinder and unseat it from the annular web.

494037

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