Rotational working cylinder

Details Rotational working cylinder Rotational working cylinder

F - Mech Eng,Light,Heat,Weapons

15

B

138/83.1

F15B 15/14 (2006.01) F15B 15/08 (2006.01)

Patent

CA 1274148

Abstract The known rotational working cylinders used e. g. in the robot techniques comprise a shaft arranged concentrically within the working cylinder and driven out of the working cylinder with at least one end of it, a piston being divided into two piston portions perpendicularly to the shaft and the piston portions being held in tensed position respect to each other, forced trajectories between the working cylinder and the piston portions as well as between the piston portions and the shaft, respectively, wherein at least one of the forced trajec- tories is formed as a longitudinal spiral path. According to the improvement in this invention, the piston portions are locked in relation to each other for main- taining the tensed position of the piston portions in all operational positions and loads of the working cylinder for the puspose of which a locking means is provided between the piston portions , and this locking means is operated by the hydraulic working agent of the rotational working cy- linder Alternatively, a sealing plate is arranged between the two piston portions , and the tensed position of the piston portions is established by the interconnection of the sealing plate . The sealing plate has a middle opening and an outer periphery, both being movable on the forced tra- jectories of the rotational working cylinder in a sealed manner, respectively.

550927

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