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. 29, 1981
Filed:
Sep. 28, 1979
Applicant:
Inventors:
Patricio D Alvarez, Rosenberg, TX (US);
James M Fowler, Marble Falls, TX (US);
George A Moran, Houston, TX (US);
Assignee:
ACF Industries, Incorporated, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
257167 ; 251196 ; 251197 ;
Abstract
A gate valve structure has an expanding valve assembly mounted with the valve chamber comprising a gate (32) and segment (34) which may be laterally expanded. The gate and segment have a plurality of coacting interfitting saw-type teeth (46,48) which define cam surfaces (50,56) to effect expansion of the gate valve assembly. A flexible sleeve (64) is secured about the ports (42,44) in the gate and segment to bridge the gap (58) between the gate (32) and segment (34) upon expansion. A torsion spring (72) urges the gate and segment to a contracted position.