The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 1992
Filed:
Feb. 19, 1991
Applicant:
Inventor:
Bobby D McKee, San Jose, CA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01B / ;
U.S. Cl.
CPC ...
9213 / ; 92135 ; 92DI / ; 277-2 ; 277 27 ; 277176 ; 277205 ; 277193 ;
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.