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:
Mar. 10, 1981
Filed:
Dec. 05, 1978
Applicant:
Inventor:
Pieter J Schuurman, The Hague, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251173 ; 251298 ; 251306 ;
Abstract
A butterfly valve for use in the control of gaseous fluids which comprises a valve disc having an annular sealing surface near its periphery, a flat annular valve seat provided in a housing accommodating the valve, and an actuating means for opening and closing the valve by bringing the valve disc sealing surface and the valve seat into cooperation, said valve seat containing an elastic sealing means which is adapted to be pressed against the sealing surface of the valve disc to enable a leakage-free closure of the valve.