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. 27, 1977
Filed:
Dec. 04, 1975
Applicant:
Inventor:
Richard S Brumm, Orinda, CA (US);
Assignee:
Grove Valve and Regulator Company, Oakland, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
251-5 ; 251 611 ;
Abstract
A valve wherein an expansible tube is stretched around a hollow core, which has a central barrier between inlet and outlet slots around the core. An annular groove is formed around the outer sealing surface of the barrier and extensions of some of the downstream slots open into the groove to vent the groove and produce a pressure drop across the expansible tube to enhance sealing and to provide an initial flow path when the tube is forced away from the sealing surface.