Positive control valve assembly

Details Positive control valve assembly Positive control valve assembly

1978-02-01

1980-06-24

Cohen, Irwin C.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

91420, F15B 1108, F15B 13042

Patent

active

042090318

ABSTRACT:
The hydraulic control valve assembly of the present invention functions to positively control the movement of a fluid powered motor unit, wherein the control valve comprises a manually slidable spool which allows hydraulic fluid to be selectively introduced into the fluid powered motor; the valve assembly further includes a piston stem-valve assembly which prevents actuation of the fluid motor in a specific direction unless the pressure in the load chamber of the fluid motor exceeds the pressure in the venting chamber by a predetermined amount.

REFERENCES:
patent: 2502800 (1950-04-01), Renick
patent: 2505527 (1950-04-01), Court
patent: 2574969 (1951-11-01), Heidloff
patent: 3155114 (1964-11-01), Ruhl
patent: 3213874 (1965-10-01), Schmiel et al.
patent: 3369566 (1968-02-01), Schmitt et al.
patent: 3398927 (1968-08-01), Ruter
patent: 3854499 (1974-12-01), Sievenpiper
patent: 3855902 (1974-12-01), Kirst

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