Hydraulic control system and valve

Details Hydraulic control system and valve Hydraulic control system and valve

1984-03-19

1987-05-12

Hershkovitz, Abraham

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

91448, 137523, F15B 1122, F15B 1306

Patent

active

046640177

ABSTRACT:
An improved sequence-and-relief valve comprises a housing (60), a plurality of conduits (42/44, 46, 53) opening into a bore (62) within the housing, a valve cartridge (64) with the bore, the valve cartridge having a central bore (66) in which a valve element (76) may be moved into and out of contact with seat (74) to control flow from a cylinder port (70) to a tank port (72) in response to changes in pressure acting at pump port (68) or at cylinder port (70). See FIG. 2.

REFERENCES:
patent: 2074268 (1937-03-01), Lowe
patent: 2389654 (1942-06-01), Van Der Werff
patent: 2890715 (1959-06-01), Ebersold
patent: 3410427 (1965-12-01), McCarthy
patent: 4089344 (1978-05-01), Flaschar et al.
patent: 4176679 (1979-12-01), Roger
patent: 4180365 (1979-12-01), Herpich et al.
patent: 4228818 (1980-10-01), Nelson
patent: 4300591 (1981-11-01), Sutton

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