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. 18, 1993
Filed:
Dec. 09, 1991
Dwight Baker, Rush Springs, OK (US);
Other;
Abstract
An expanding gate valve having replaceable valve seats that are capable of longer operating life than conventional valve seats. The valve seats of the present invention have sealing faces that are case hardened to a hardness of about Rockwell 60 C and are devoid of resilient sealing rings in the sealing faces. Additionally, the seats are of floating construction, and are adapted to move both axially and to tilt relative to the seat recesses that are provided in the valve body. Finally, a resilient biasing arrangement is provided at the rear portion of the seat to bias it outwardly relative to the seat recesses to insure substantially complete surface engagement between the sealing face of the seat ring and the face of the respective gate surface.