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. 21, 1981
Filed:
Aug. 30, 1979
Scott W Binegar, Houston, TX (US);
ACF Industries, Incorporated, New York, NY (US);
Abstract
A pressure energized packing arrangement (50, 74) for sealing the stem (64) and bonnet (66) of a high pressure gate valve. A stack of packing rings (90) is compressed against the valve stem and bonnet by retainer rings (92, 94) which are urged together by fluid pressure in the valve body. Extrusion of the packing rings (90) is prevented by metal chamfer rings (102, 108, 114, 120) which are cammed by the retainer rings (92, 94 ) against the valve stem (64) and bonnet (66). The packing assembly is held together by pins (124) against which metal gaskets (132) are cammed by the retainer rings (92, 94) to prevent extrusion of the packing rings (90) along the pins.