Rotary and linear actuating device

Details Rotary and linear actuating device Rotary and linear actuating device

1983-04-22

1985-01-15

Garrett, Robert E.

Expansible chamber devices

One working member reciprocates and another rotates common...

92 137, 92 85A, 92121, 92128, 91 61, F01B 2100, F01B 2900, F15B 1524

Patent

active

044932456

ABSTRACT:
A rotary and linear actuating device is disclosed for imparting precision rotary and linear movement to an external member or assembly. In a preferred form of the invention a rotatable assembly is rotated about an axis within a housing by selectively varying the relative pressures of an actuating fluid in at least a pair of fluid pressure chambers defined by the housing, the rotatable assembly and at least a pair of vane members extending therebetween. An elongated shaft member is rotationally fixed relative to the rotatable assembly and is supported by at least a pair of linear bearing assemblies to allow linear movement of the elongated shaft member along said axis. The linear bearing assemblies remain a fixed axial distance from one another in order to adequately support heavy loads on the elongated shaft member and the external member or assembly attached thereto. The device also preferably includes adjustment means for selectively adjusting the clearance between the elongated shaft member and the linear bearing assemblies.

REFERENCES:
patent: 2262432 (1941-11-01), Rodder et al.
patent: 2338093 (1944-01-01), Caldwell
patent: 2437213 (1948-03-01), Slomer
patent: 2893210 (1959-07-01), Muszynski
patent: 4186651 (1980-02-01), Taig
patent: 4186911 (1980-02-01), Huet et al.
patent: 4254639 (1981-03-01), Teramachi
H. E. Thompson, "Spline Joint", Apr. 1960, IBM Technical Disclosure Bulletin, vol. 2, No. 6, pp. 7-8.

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