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. 16, 1985
Filed:
Jan. 10, 1983
Terry G Young, Longview, TX (US);
Joy Manufacturing Company, Pittsburgh, PA (US);
Abstract
A high pressure in-line test valve (42) is positioned to block off a first fluid pressure source (10) acting on a control valve means (32 and 34) and to provide communication with an alternate test fluid pressure source (138) for testing the control valve means. The test valve (42) has a central bore (70) in which a depressible piston (78) is positioned for longitudinal movement between a seated extended position (FIG. 2) blocking the first fluid pressure source and simultaneously communicating test fluid to the control valve means, and an unseated retracted position (FIG. 3) re-establishing communication between the first fluid pressure source and the control valve means and simultaneously blocking the alternate fluid pressure source (138) with a dual sealing means. The dual sealing means includes a primary metal-to-metal sealing member (84 and 114) and a secondary annular sealing member (120) providing a test valve that is capable of withstanding high working pressures such as 20,000 pounds per square inch without leaking fluid from the first fluid pressure source ( 110) to the alternate fluid passage (104) or externally of the test valve. The dual sealing means are releasable upon engagement of a hollow stinger (124) which actuates the piston (78) into its seated position and provides a connection means (134) to supply a test fluid from an alternate fluid pressure source (138) for testing of the control valve means (32 and 34).