Alternating valve

Details Alternating valve Alternating valve

1987-03-10

1988-05-17

Garrett, Robert E.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Condition responsive means for modifying working member...

91521, 91534, 91536, 91517, 13762414, 13762418, 172 2, 172 28, F15B 1100

Patent

active

047442859

ABSTRACT:
An automatic, hydraulically actuated, sequencing valve for use with a pair of hydraulic acutators (e.g. double acting hydraulic cylinders) includes a valve body having a cylindrical bore therein. Cam members at either end of the bore are engaged by pins on the ends of a cylindrical spool, thereby rotating the spool 30.degree. each time it engages one of the cam members. A third cam member incorporated into the spool alternately locks open one of a pair of check valves as said spool is pressure shifted between the two bore cam members. The third cam member operates a locking system which permits only one of the two hydraulic cylinders to operate at a time and in sequence.

REFERENCES:
patent: 2321267 (1943-06-01), Werff
patent: 3556149 (1971-01-01), Ribier
patent: 3626967 (1971-12-01), McCarthy
patent: 4285268 (1981-08-01), Deckler
patent: 4488476 (1984-12-01), Diel et al.

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