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:
Aug. 05, 1980
Filed:
Feb. 05, 1979
Roy R Dare, Houston, TX (US);
Jeff L Merten, Houston, TX (US);
ACF Industries, Incorporated, New York, NY (US);
Abstract
A gate valve which is mounted on a wellhead assembly and which may be closed to shear off workover lines, macaroni tubing and other suspension members so as to quickly shut in a well under emergency conditions. The gate has a flow port which aligns with the flow passage of the valve when the gate is open. A cutting edge of the port cooperates with a corner area of the downstream valve seat to shear the suspension member when the gate is forcefully closed by a hydraulic actuator mechanism. An undercut open space is presented immediately below the cutting edge to accommodate the sheared suspension member without jamming the gate or otherwise hampering its closure function.