F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/91
F15B 15/20 (2006.01)
Patent
CA 1269024
ABSTRACT OF THE DISCLOSURE A hydraulic operating apparatus in which a differential piston is used as a drive unit, and in which the differential piston is driven by applying a high pressure fluid on a large piston face side through a hydraulic pressure control device for controlling the hydraulic pressure, and a high pressure fluid always being applied on the small piston face side. The hydraulic operating apparatus is constructed such that a high pressure fluid is applied concurrently on both piston faces when the differential piston stops at its receeded position, and a thrust generated due to the difference between the forces applied on the both piston faces is held in check by a holding device acting on the differential piston or its extension. The differential piston is moved forward upon the removal of the holding force of the holding device, and the piston is moved backward upn the removal of the high pressure fluid on the large piston face side.
512291
Sugiyama Tsutomu
Yoshizumi Toshiaki
Marks & Clerk
Mitsubishi Denki Kabushiki Kaisha
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