High speed hydraulic fluid venting valve in a hydraulic fluid pu

Details High speed hydraulic fluid venting valve in a hydraulic fluid pu High speed hydraulic fluid venting valve in a hydraulic fluid pu

1986-03-17

1987-12-29

Croyle, Carlton R.

Pumps

Successive stages

Condition responsive control of fluid

60468, 417299, F16D 3100

Patent

active

047157895

ABSTRACT:
A valve assembly for controlling discharge of hydraulic fluid from a high pressure hydraulic fluid container to a hydraulic fluid reservoir and including a valve body having a valve bore, a fluid inlet port communicating with the valve bore on one side of a valve seat, and a fluid outlet port communicating with the valve bore on an opposite side of the valve seat. A valve spool is housed in the valve bore and includes a valve member selectively engageable with the valve seat to prevent hydraulic fluid flow through the valve bore. The valve member is selectively biased against the valve seat by a valve piston housed in a valve cylinder, the valve piston being operably connected to the valve member such that hydraulic fluid pressure in the valve cylinder biases the valve member toward the valve seat. A compression spring is also provided for resiliently biasing the valve member away from the valve seat such that the valve member will move away from the valve seat when the hydraulic fluid pressure in the valve cylinder falls below a predetermined pressure.

REFERENCES:
patent: 3704588 (1972-12-01), Trabbic
patent: 3889709 (1975-06-01), Dwyer
patent: 3948147 (1976-04-01), Sauer et al.
patent: 3976090 (1976-08-01), Johnson

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