Combination pressure control selector valve

Details Combination pressure control selector valve Combination pressure control selector valve

1975-10-03

1977-03-01

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

1376253, 13762568, F15B 1304

Patent

active

040097307

ABSTRACT:
A manually operated clutch valve adapted for use with a forward-reverse clutch provides modulated flow by use of a combination of linearly tapered metering slots and passages on the valve spool lands. The valve provides for linear pressure rise for proportionate lever movement in addition to the capability of selection of forward or reverse clutch engagement. Linear pressure rise occurs until about 90% of the maximum spool travel has been achieved at which point the full flow is abruptly provided to produce engagement of the clutch and thereby prevent a stick clip clutch condition.

REFERENCES:
patent: 2631571 (1953-03-01), Parker
patent: 2952275 (1960-09-01), Mock
patent: 3049147 (1962-08-01), Neilson
patent: 3123335 (1964-03-01), Darling
patent: 3477225 (1969-11-01), Cryder et al.
patent: 3477472 (1969-11-01), Mercier
patent: 3862645 (1975-01-01), Bianchetta et al.

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