Rotary actuator

Details Rotary actuator Rotary actuator

1983-07-07

1986-12-16

Garrett, Robert E.

Expansible chamber devices

Oscillating working member or cylinder therefor

92255, F01C 900

Patent

active

046287973

ABSTRACT:
A rotary actuator having a cylindrical housing in which an annular piston arm rotates through an arc within an annular chamber in the housing as a result of fluid pressure to produce rotary motion communicated from the piston to the drive shaft. The piston head is capable of lateral or radial movement relative to the piston arm so as to accommodate flexing of the piston arm or variances in the shape of the chamber. Friction reduction washers are placed between the piston head and the piston arm to facilitate this movement. The overall effect is to reduce the friction encountered by the piston head against the walls of the chamber during movement, thereby improving overall performance of the actuator.

REFERENCES:
patent: 2436908 (1948-03-01), Van Weenan et al.
patent: 2649077 (1953-08-01), Mehm
patent: 3173344 (1965-03-01), Mongitore
patent: 3444788 (1969-05-01), Sneen
patent: 3446120 (1969-05-01), Sneen
patent: 3995536 (1976-12-01), Tenfjord

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