EP 0266702 A1 19880511 - Rotational working cylinder.
Title (en)
Rotational working cylinder.
Title (de)
Drehantriebszylinder.
Title (fr)
Cylindre d'entrainement rotatif.
Publication
Application
Priority
US 92705786 A 19861104
Abstract (en)
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 in 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 trajectories is formed as a longitudinal spiral path. According to the improvement in this invention,tthe piston portions (3, 4) are locked in relation to each other for maintaining the tensed position of the piston portions (3, 4) in all operational positions and loads of the working cylinder (1), for the puspose of which a locking means is provided between the piston portions (3, 4), and this locking means is operated by the hydraulic working agent of the rotational working cylinder (1). Alternatively, a sealing plate (32) is arranged between the two piston portions (3, 4), and the tensed position of the piston portions (3, 4) is established by the interconnection of the sealing plate (32). The sealing plate has a middle opening and an outer periphery, both being movable on the forced trajectories of the rotational working cylinder (1) in a sealed manner, respectively.
IPC 1-7
IPC 8 full level
F15B 15/26 (2006.01); F15B 15/08 (2006.01)
CPC (source: EP US)
F15B 15/068 (2013.01 - EP US); Y10T 74/19902 (2015.01 - EP US)
Citation (search report)
- [A] DE 1217163 B 19660518 - LICENTIA GMBH
- [AD] DE 2701717 A1 19770721 - PERENCO LTD
- [A] SOVIET INVENTIONS ILLUSTRATED, Section Mechanical, week 84/20, abstract no. 125456 Q57, 27th June 1984, Derwent Publications Ltd., London, GB; & SU - A - 10 35307 (MOSCOW BAUMAN) 15-08-1983
- [A] SOVIET INVENTONS ILLUSTRATED, section Mechanical, week E30, abstract no. K0489 Q64, 8th September 1982, Derwent Publications Ltd., London, GB; & SU - A 868 202 (KAUFMAN I M) 30-09-1981
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0266702 A1 19880511; CA 1274148 A 19900918; JP S63266202 A 19881102; US 4803914 A 19890214
DOCDB simple family (application)
EP 87116015 A 19871030; CA 550927 A 19871103; JP 27753287 A 19871104; US 92705786 A 19861104