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:
Jun. 30, 1987
Filed:
Jan. 07, 1982
Applicant:
Inventor:
Wendell D Johnson, Rochester, NY (US);
Assignee:
Qualitrol Corporation, Fairport, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137242 ; 13451625 ; 134469 ; 174 / ;
Abstract
An improvement in a pressure relief device of the type used in a power transformer, the improvement consisting of a flat circular gasket fixedly mounted about its inner periphery, and having its outer periphery flexibly arranged for wiping contact with the inner surface of a cup-like valve member.