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:
Sep. 25, 1979
Filed:
Nov. 18, 1977
Applicant:
Inventor:
William H Schneider, Pittsford, NY (US);
Assignee:
Chicago Pneumatic Tool Company, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ;
U.S. Cl.
CPC ...
137542 ; 137557 ; 13761419 ;
Abstract
A pressure relief valve for attachment to a tank, such as used on an electrical transformer, which valve will release excessive gas pressure developed in the tank because of transformer malfunction. The valve has a cap which uncovers a signal indicating portion of the valve when the valve is unseated during a pressure release operation. The cap remains in signal uncovered position, after the valve resets, to warn maintenance personnel that the tank has had an excessive pressure condition.