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:
Mar. 21, 1989
Filed:
Mar. 13, 1987
Marius R Junier, Houston, TX (US);
Triten Corporation, Houston, TX (US);
Abstract
A plug valve, a check valve for a plug valve, a pressure regulator for a plug valve, and a check valve for a conduit. A plug valve having a plug closure member for sealing off the open end of a conduit and thereby preventing flow of a first fluid through the conduit, the plug closure member connected to a hollow stem, a channel for the flow of a second fluid extending through the hollow stem and plug closure member, the plug closure member and stem movable in a guide tube toward and away from the open end of the conduit, the plug closure member seatable in the open end of the conduit. In one embodiment the plug valve may have a pressure regulating member in the channel through which the second fluid flows. In another embodiment a check valve may be disposed within the channel to prevent flow of the first fluid down the hollow stem. The pressure regulating member and check valve may be combined in one embodiment. A conduit for use with a plug valve, the conduit having a check valve.