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:
May. 31, 1977
Filed:
Dec. 31, 1975
Thomas M Jones, Houston, TX (US);
ACF Industries, Incorporated, New York, NY (US);
Abstract
A tool for extracting press-fitted seats from annular seat recesses of a gate valve body by insertion within the flow passage from the valve chamber. The tool is generally cylindrical in shape and has a pair of spaced end caps secured to each other with a pair of spaced elastomeric annular seals between the end caps and seal retainers on each side of the elastomeric seals. Pressurized hydraulic fluid is inserted in the tool to urge the elastomeric seals outwardly; one seal being in fluid sealing contact with the seat to be removed and the other seal being in fluid sealing contact with the adjacent flow passage surface. An increase in the fluid pressure of the hydraulic fluid effects a flow of fluid in the recess behind the seat to move the seat out of its recess.