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:
Jan. 10, 1984
Filed:
Sep. 29, 1982
Applicant:
Inventor:
James L Grindle, Hendersonville, NC (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
F29V / ;
U.S. Cl.
CPC ...
362373 ; 362362 ; 362267 ; 362376 ; 285 94 ; 285355 ; 285390 ;
Abstract
Thread joints in explosion-proof electrical fixtures for hazardous areas must relieve the momentary pressure from an internal explosion without flame propagation to the exterior. Ordinary paint on the threads cannot be used due to variations in thickness which alter the flow characteristics and the cooling effects. The invention provides a dense, pinhole-free paint layer uniform in thickness within .+-.15% which can be achieved by electrodeposition. Such a coating facilitates assembly and inhibits deterioration of the clearance path through corrosion but has only a minor effect on the venting relief.