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:
Nov. 09, 1976
Filed:
Nov. 20, 1974
Applicant:
Inventors:
Rudi Hanke, Vienna, OE;
Johann Frohlich, Dobermannsdorf, OE;
Assignee:
OMV Aktiengesellschaft, Vienna, OE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A47J / ; A47J / ; B65D / ;
U.S. Cl.
CPC ...
220316 ; 220319 ; 220334 ; 292251 ; 2922566 ; 29225671 ; 29225673 ; 292301 ; 292D / ;
Abstract
A closure for a large diameter circular opening such as the end of a tubular conduit subjected to internal positive pressure comprises a coaxial cover lid that may be opened only when a pressure relieving venting valve is opened, the cover lid being connected over the opening by screw threaded means of larger diameter than the inside diameter of the opening, and the venting valve having a removable closure cap which impedes removal of the lid until the internal pressure is vented.