Zero leakage directional control valve

Details Zero leakage directional control valve Zero leakage directional control valve

1993-10-06

1995-10-03

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

1374546, 1375961, 251332, 251900, F15B 13042

Patent

active

054544009

ABSTRACT:
A fluid directional control valve has at least one working fluid control port and a pressure inlet controlled with respect thereto by a poppet valve where zero leakage sealing is achieved by provision of a poppet seat which combines a resilient seal portion with a non-deformable poppet supporting portion; has a second, axially aligned valve, which may also be a poppet assembly, for controlling fluid exhaust flow from the controlled port and has an extended plunger whereby actuation of the second valve blocks exhaust flow while unseating the pressure control poppet.

REFERENCES:
patent: 1373599 (1921-04-01), Clark
patent: 2477237 (1949-07-01), Carr
patent: 2535785 (1950-12-01), Couri
patent: 2658523 (1953-11-01), Johnson
patent: 2959188 (1960-11-01), Kepner
patent: 3272218 (1966-09-01), Johnson
patent: 3326239 (1967-06-01), Saint-Joanis et al.
patent: 4014510 (1977-03-01), Smith
patent: 4071046 (1978-01-01), Cates
patent: 4304258 (1981-12-01), Mitchell

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