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:
Jun. 08, 1982
Filed:
Jan. 07, 1981
Applicant:
Inventor:
Russell G Smith, Cincinnati, OH (US);
Assignee:
Xomox Corporation, Cincinnati, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251214 ; 251309 ; 2513 / ;
Abstract
A plug valve is provided with primary, secondary and tertiary seals. The primary seal includes an apertured sleeve which envelopes a plug portion of a valving member. The secondary and tertiary seals are provided by a delta ring and a lip of a diaphragm respectfully. The diaphragm is formed with a hollow annular groove proximal to the stem portion of the valving member. The delta ring is placed in this hollow annular groove with an interference fit to form a secondary seal between itself and the valving member and to augment the tertiary seal formed between a lip of the diaphragm and the valving member.