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. 11, 1984
Filed:
Jun. 10, 1982
Duane M Eagen, Marblehead, MA (US);
Barton Valve Company, Inc., Shawnee, OK (US);
Abstract
An expanding gate valve having a pressure-secured seat. The valve includes a valve body having a cavity formed therein and an inlet and outlet formed in the body, both of which intersect the cavity. A counterbore is formed about the circumference of both the inlet and the outlet at their respective intersections with the cavity. An annular seat having a rear surface and a front seat surface is received within the inlet counterbore. An annular seal is formed on the front seat surface and a second annular seal is disposed between the rear surface and the valve body. The front annular seal has a sealing diameter greater than the rear annular seal and an annular recess is formed on the front seat surface on the radially inward side of the annular seal. A second annular seat having a planar front seat surface is received within the outlet counterbore. An expandable gate is mounted for selective vertical positioning in the cavity for permitting flow between the inlet and outlet in one position and for sealing off such flow in another position. When in position for sealing off such flow, the gate is expanded into sealing engagement with the first and second seats.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile