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:
Sep. 06, 1983
Filed:
May. 04, 1981
Applicant:
Inventor:
Pieter J Schuurman, The Hague, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ;
U.S. Cl.
CPC ...
137240 ; 137334 ; 137340 ; 137341 ; 251159 ; 251170 ; 251195 ; 251327 ;
Abstract
A valve for controlling the flow of fluids containing abrasive particles including thermally-actuated means for ensuring a tight seal between the movable valve element and the valve body in both the open and closed positions. The thermally-actuated means is deactivated when repositioning the movable valve element and reactivated to provide a tight seal when the movable valve element is in position.