Hydraulic control valve with fluid dampening system

Details Hydraulic control valve with fluid dampening system Hydraulic control valve with fluid dampening system

1983-12-02

1985-07-30

Michalsky, Gerald A.

Valves and valve actuation

Fluid actuated or retarded

Dashpot or fluid controlled retarder or timer

13762569, 251 54, 251297, F15B 1301

Patent

active

045317097

ABSTRACT:
A hydraulic control valve includes a spool valve intermittently movable between a neutral position and a more preselected axially spaced position. The spool valve is latched in said preselected position. The valve further includes a fluid dampening system. The system includes a fluid receiving chamber in said control valve. A piston is movably disposed within the chamber. A fluid supply is connected to the chamber for delivering fluid thereinto. A fluid flow control device regulates the flow of fluid from said chamber. As the spool valve is moved towards its neutral position from the preselected position, the piston is displaced to discharge fluid from the chamber through the fluid flow control device. A fluid reactive force is generated by the discharge of fluid from the chamber, with the fluid reactive force acting on the spool valve to dampen movement thereof towards its neutral position.

REFERENCES:
patent: 2403519 (1946-07-01), Gardiner
patent: 2798461 (1957-07-01), Gold et al.
patent: 2919679 (1960-01-01), Lincoln et al.
patent: 3762442 (1973-10-01), Paul

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