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:
Jan. 31, 1978
Filed:
Oct. 29, 1976
Applicant:
Inventors:
Albert A Raimondi, Monroeville, PA (US);
Howard N Kaufman, Monroeville, PA (US);
Norman J Wood, San Jose, CA (US);
Assignee:
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277-3 ; 277 27 ; 277 74 ; 277134 ;
Abstract
A system preventing fluid leakage from the inside of a compressor to the atmosphere. Static sealing of a non-rotating compressor shaft is provided by a multi-faced piston axially contacting a sleeve which is attached to and surrounds the shaft. The multi-faced piston is slidably actuated to the open, unsealed position during shaft rotation and to the closed, sealed position during non-rotation of the shaft by a series of conduits and valves which direct the fluid against an appropriate face of the piston.