F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/87.1
F15B 15/26 (2006.01) B62D 33/07 (2006.01) F15B 11/08 (2006.01) F15B 13/01 (2006.01)
Patent
CA 1093939
LOCKING CYLINDERS Abstract of the Disclosure Disclosed are two embodiments of a locking cylinder. In both embodiments the locking cylinder comprises a housing, a working piston, a pilot piston, and a counter balance valve to substantially smoothen the operation of the working piston, particularly when an induced pressure is applied to the working piston. In the first embodiment, the pilot piston slides as a unit, although it may be formed in two axially separate parts. In the second embodiment, the pilot piston is formed in two axially separate parts, communicating bores are formed in the two parts, a ball valve is located in the bore in one of the parts, a free floating pin is disposed in the bores between the ball valve and an abutment surface in the other part, and the ball valve is biased shut. The pin is sized to unseat the ball valve when the two parts are in contact, but the two parts are biased apart by the action of the biasing means, which is transmitted through the pin to the abutment surface.
322569
Applied Power Inc.
Smart & Biggar
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