Height control valve and dump valve therefor

Details Height control valve and dump valve therefor Height control valve and dump valve therefor

1993-06-07

1994-08-02

Nilson, Robert G.

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

91448, 13762527, 280714, B60G 1126

Patent

active

053336453

ABSTRACT:
A dump valve for selectively placing the inlet port of a height control valve into communication with a source of pressurized air or atmosphere. The dump valve comprises a body having a control bore, an opposing pilot bore, an exhaust bore intersecting the control bore, and a connection bore intersecting the control bore. The connecting bore has means for fluidly connecting the connection bore to the inlet bore of a height control valve. A valve seal disposed within the control bore for reciprocal movement therein selectively places the connection port in communication with either the supply port or the exhaust port. A piston axially disposed in the pilot bore for reciprocal movement therein controls the movement of the valve seal in response to the selective application of pressure to the pilot bore.

REFERENCES:
patent: 2886377 (1959-05-01), Martin
patent: 2908291 (1959-10-01), Hunt
patent: 3167093 (1965-01-01), George
patent: 4886092 (1989-12-01), Barzelay

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