Three-way hydraulic valve

Details Three-way hydraulic valve Three-way hydraulic valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/87

F16K 11/10 (2006.01) F16K 31/00 (2006.01) H01H 33/34 (2006.01)

Patent

CA 1290650

ABSTRACT OF THE DISCLOSURE An open-center three-way hydraulic valve as applicable to hydraulic control circuits of electric circuit-breakers comprises an admission valve-head which is restored to the closed position by a first spring, a drain valve-head which is displaced toward the closed position by a pilot valve, a second spring which is more powerful than the first and tends to close the drain valve-head, and a resilient semi-locking mechanism for retaining the drain valve-head in the open position in opposition to the second spring when the pilot jack is not under pressure.

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