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:
Jan. 23, 1990
Filed:
Nov. 21, 1988
Applicant:
Inventor:
Thomas P McKavanagh, Aurora, CA;
Assignee:
The Clarkson Company, Sparks, NV (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16L / ;
U.S. Cl.
CPC ...
137375 ; 138 943 ; 251195 ; 251327 ; 251328 ;
Abstract
A packingless gate valve comprises a housing having two opposed resilient sleeve units that compressibly engage end to end in the valve open condition and engage opposite sides of the gate in the valve closed condition. Each sleeve unit is a resilient annular body formed at one end with an axially projecting seal lip near the inner periphery and has a stiffener ring enclosed adjacent the outer periphery at the one end. An integral gasket forming flange is formed on the other end of the sleeve body.