Pressure fluid regulating valve, particularly pressure reducing

Details Pressure fluid regulating valve, particularly pressure reducing Pressure fluid regulating valve, particularly pressure reducing

1980-12-03

1983-01-18

Cohan, Alan

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

251120, 251324, 137489, F16K 31363

Patent

active

043688721

ABSTRACT:
The pressure fluid regulating valve has a central blind bore provided with axially spaced inlet and outlet openings, a sliding spool movable in the blind bore and defining two piston-like areas at its ends and an intermediate recessed portion having inclined walls and a central flange of a trapezoidal contour; a central bore in the spool interconnects via a throttling passage the end faces of the piston-like areas and communicates also with the recessed portion; the recessed area in the rest position of the spool interconnects the inlet and outlet openings and the inclination of respective sloping walls of the recessed portion and of the flange is selected so as to ensure a substantially uniform flow through the passage in any axial position of the spool.

REFERENCES:
patent: 3489163 (1970-01-01), Brietsprecker
patent: 4220178 (1980-09-01), Jackson

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