F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/91
F15B 15/14 (2006.01) F15B 15/24 (2006.01)
Patent
CA 1174562
ABSTRACT A remotely controlled, adjustable stroke fluid power actuator system includes a cylinder having opposite end walls and a piston rod slideably extending through one of the end walls, the piston rod having a passage extending between its interior and exterior portions. A captured piston is secured to the interior portion of the piston rod and a floating piston is movable between a position abutting the captured piston and a position spaced therefrom. The pistons define a cavity therebetween, the passage in the piston rod com- municating therewith. The cylinder has a first port for admitting fluid between the one end wall and one of the pistons to move at least one of the pistons in one direc- tion toward the other end wall, and a second port for admitting fluid between the other end wall and the other of the pistons to move at least one of the pistons in the opposite direction toward the one end wall. The exterior portion of the piston rod has a third port for admitting fluid to the passage and cavity thereby to move one of the pistons away from the other. A manually-activated, four- way valve selectively connects a fluid pump to the first cylinder port and to the second or third cylinder ports as determined by a solenoid-actuated two-way selector valve.
390411
Osler Hoskin & Harcourt Llp
Rugby Hydraulic Company
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