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. 06, 1994
Filed:
Oct. 15, 1993
Peter M Kent, Greengates Warthill by Inverurie, GB;
Anton J Dach, Houston, TX (US);
Hernani G Deocampo, Houston, TX (US);
Ted D Williams, Houston, TX (US);
ABB Vetco Gray Inc., Houston, TX (US);
Abstract
An improved gate for a gate valve will allow shearing of a wireline extending through the gate valve while preserving post-shear seal integrity. The improved gate comprises an inlay of a hard ductile material such as Stellite along the shearing edge of the gate. The gate also comprises a coating of an extremely hard material such as tungsten carbide on the sealing surface of the gate. The invention also covers an improved gate seat. The improved seat also comprises an inlay of a hard ductile material such as Stellite along its shearing edge. The improved seat can also have a coating of an extremely hard material such as tungsten carbide on part of its sealing surface.