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:
Dec. 08, 1987
Filed:
Mar. 03, 1986
Applicant:
Inventors:
Don B Wafer, Houston, TX (US);
Claud C Barrington, Houston, TX (US);
Assignee:
FMC Corporation, Chicago, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F17D / ;
U.S. Cl.
CPC ...
137 14 ; 13762533 ; 251327 ; 251 82 ;
Abstract
A gate valve includes a pressure relief port located on the gate valve. When the gate is positioned such that the port communicates with one of the two flow passages and the valve body interior, uni-directional flow is permitted from the other of the flow passages. Flow is blocked bi-directionally when the port is positioned out of communication with the flow passage.