Compound linear motion and rotary actuator

Details Compound linear motion and rotary actuator Compound linear motion and rotary actuator

2008-04-15

2008-04-15

Lazo, Thomas E. (Department: 3745)

Expansible chamber devices

One working member reciprocates and another rotates common...

C092S031000, C092S051000, C092S116000

Reexamination Certificate

active

07357065

ABSTRACT:
To eliminate necessity for rotating a rotation drive mechanism against frictional resistance originated by a sealing portion of a piston when an output shaft is rotated in a component linear motion and rotary actuator. An inside cylinder tube is concentrically provided in an outside cylinder tube and a piston that is driven by means of fluid pressure is fit into a cylinder chamber having a cylindrical shape formed between both the cylinder tubes in a manner so as to be slidable in an axial direction of the piston. A holder, which is rotatably supported by means of a bearing and which is capable of being rotated by means of rotation drive mechanism, is provided in the inside cylinder tube. An output shaft is inserted into the holder, in which the output shaft slides in the axial direction whereas the same does not rotate relative to the holder, and the output shaft is connected to the rod of the piston in a manner such that output shaft is rotatable by means of a bearing whereas the same integrally moves in the axial direction.

REFERENCES:
patent: 3798910 (1974-03-01), Bent
patent: 3973468 (1976-08-01), Russell, Jr.
patent: 3989223 (1976-11-01), Burkhardt et al.
patent: 5727445 (1998-03-01), Sheldon
patent: 6247390 (2001-06-01), Busch et al.
patent: 19904942 (2000-08-01), None
patent: 8-8322 (1996-03-01), None

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