4/2 Way valve

Details 4/2 Way valve 4/2 Way valve

1977-10-05

1979-12-25

Cohan, Alan

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

13762414, 184 7F, 222249, F16N 2502

Patent

active

041800907

ABSTRACT:
A pressure controlled 4/2 way valve, particularly for the alternating control of the feed conduits of two conduit - lubrication systems. Three cylindrical spaces are formed in a housing connected by channels with one another and each contain a piston for the automatic control of medium flowing therethrough. The pistons are each displaceable between two end positions, one piston functioning as a control piston, a second as an auxiliary control piston, and the third as a reception piston. One feed conduit is connected respectively on each side to the cylindrical space for the reception piston. A pressure relief valve for hydraulic precontrol is disposed in the flow path between a pressurized conduit connection and the cylindrical space for the reception piston.

REFERENCES:
patent: 2794518 (1957-06-01), Pawling
patent: 3390943 (1968-07-01), Myers

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