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:
Aug. 06, 1991
Filed:
Sep. 21, 1990
Applicant:
Inventors:
Rudolf Hirz, Frankfurt/M-Nied, DE;
Eric Vanhie, Gent-Wondelgem, BE;
Assignee:
Durametallic Corporation, Kalamazoo, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251214 ; 251315 ; 277111 ; 277200 ;
Abstract
A sealing system in a ball valve is designed with a bellows which carries a sliding packing ring on the side of the valve housing and presses against a sliding packing ring on the side of the pivot shaft. The bellows is protected by a guard ring. The ball valve has a shaft coupled to a cap through a releasable locking device.