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:
Apr. 10, 1979
Filed:
Jun. 13, 1977
Applicant:
Inventor:
Edward G Holtgraver, Pittsburgh, PA (US);
Assignee:
Fisher Controls Company, Marshalltown, IA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251148 ; 251306 ; 137375 ;
Abstract
A butterfly valve assembly to be installed between pipeline flanges and secured by flange bolts is disclosed. A cylindrical valve body ring, having a cylindrical bore and a face portion at each end, has a resilient elastomer lining which covers the bore and extends over a portion of the faces. A disk is attached to a shaft which extends through the body ring and liner transverse to the axis of the body ring. The valve assembly has at least one face plate with an opening which circumscribes the portion of the liner extending over the face of the body ring.