Actuator apparatus with secondary seal motion

Details Actuator apparatus with secondary seal motion Actuator apparatus with secondary seal motion

1991-02-19

1992-02-18

Look, Edward K.

Expansible chamber devices

With separate biasing means for working member

92135, 92DIG4, 277 2, 277 27, 277176, 277205, 277193, F01B 3100

Patent

active

050883852

ABSTRACT:
An actuator having a plurality of concentric cylinders with the inner and outer cylinders being adapted to connect to apparatus which must move relative to one another. Flexible sealing rings are positioned between adjacent cylinders and when the pressure within the cylinders is increased, the flexibility sealing rings will be forced against the action of a spring. When the pressure is relieved, the flexible sealing rings will return to their original position. In another mode of operation, if the pressure is further increased, instead of being relieved, normal operation of the actuator will take place.

REFERENCES:
patent: 1973323 (1934-09-01), Adams
patent: 2783744 (1957-03-01), Tennis
patent: 2928685 (1960-03-01), Tracy
patent: 3730057 (1973-05-01), Friden
patent: 3894741 (1975-07-01), McHugh
patent: 3914752 (1975-10-01), Howard et al.
patent: 4106779 (1978-08-01), Zabcik
patent: 4655159 (1987-04-01), McMills
patent: 4901629 (1990-02-01), Mohn

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