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. 03, 1979
Filed:
Jun. 16, 1977
George A Moran, Houston, TX (US);
ACF Industries, Incorporated, New York, NY (US);
Abstract
A ball or spherical plug valve has a pair of annular metallic seal rings mounted in grooves in the valve chamber around the inlet and outlet passageways of the valve body. Each metallic seal ring is of a one-piece generally uniform angled cross-section to form a leg portion and a free lip portion. The free lip portion extends transversely of the longitudinal axis of the passageways and a substantially continuous line contact is provided between an inner annular edge portion of the free lip portion and the valve member. The lip portion is bent from a free position substantially perpendicular to the leg portion to a substantially frusto-conical position when the valve is assembled so the seal ring acts as a spring to urge itself against the ball valve member to maintain sealing contact.