Flow compensator valve

Details Flow compensator valve Flow compensator valve

1992-09-30

1994-06-14

Look, Edward K.

Fluid handling

Line condition change responsive valves

Direct response valves

137517, 91433, 91443, F16K 1500, F16K 1700, F15B 1110

Patent

active

053201353

ABSTRACT:
A flow compensator valve for use in a hydraulic system which includes a cylindrical body having inlet and outlet ports, and a slidable, spring-biased hollow piston insert disposed within a center bore of the body, which insert has a plurality of ports for flow control depending on the position of the insert as it reciprocates axially within the center bore of the valve body. In a preferred embodiment, the valve is used in connection with a hydraulically actuated lift which is particularly useful for assistance of handicap persons for vans and mass transit vehicles. The axially-reciprocable, spring-biased flow rate controlling insert has a small central axial bore for slow lift movement in the loaded condition and at least one larger transverse bore, which when exposed, permits flow therethrough for faster movement of the lift in the unloaded condition.

REFERENCES:
patent: 2136898 (1938-11-01), Thomas
patent: 3170481 (1965-02-01), Presnell
patent: 4932435 (1990-06-01), Stroze et al.

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