Control valves

Details Control valves Control valves

1980-08-12

1982-10-19

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91449, 91452, 137881, 251284, 251297, F15B 1304

Patent

active

043545262

ABSTRACT:
A valve structure is provided for use in an integral hydraulic pump and valve assembly having a housing adapted to be integral with a pump housing with spaced apart low pressure and high pressure ports corresponding to the low pressure inlet port and high pressure outlet port of said pump, a low pressure chamber, a high pressure chamber and a cylinder chamber in said housing spaced apart and generally parallel to one another, a transverse bore in said housing intersecting said chambers, valve means movable axially in said bore, said valve means having an annular groove intermediate its ends capable of connecting said low pressure and high pressure chambers in a first neutral position, capable of connecting all of said chambers in a second position and connecting only the low pressure chamber in a third position, detent means in said housings extending into said bore and annular groove in the valve member, detent engaging means in said groove intermediate its ends and stroke limiting means extending into the bore and groove on opposite sides of the detent means to engage the ends of the groove when the valve member is moved in opposite directions to limit its movement.

REFERENCES:
patent: 2538928 (1951-01-01), Wood
patent: 2679263 (1954-05-01), Kiser et al.
patent: 2847182 (1958-08-01), Mancusi
patent: 3050083 (1962-08-01), Verway
patent: 3610285 (1971-10-01), Passaggio
patent: 3707168 (1972-12-01), Boelkins

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