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:
Oct. 06, 1981
Filed:
May. 07, 1979
Applicant:
Inventors:
Harris I Stanback, Lexington, KY (US);
Theodore L Brann, Lexington, KY (US);
Larry D Polston, Lexington, KY (US);
Assignee:
Square D Company, Palatine, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
E05C / ;
U.S. Cl.
CPC ...
292 85 ; 292 91 ;
Abstract
A spring steel spring interlocked with a panelboard assembly door by a pull having a leg projecting through the door to engage a passage edge in the spring. When the pull is rotated to open the door the leg moves the spring to disengage a latch adjacent one end of the spring from behind a detent in a frame latch passage. The detent in the frame passage engages the latch to hold the door from rapid opening, if a circuit breaker trips to generate arc gases which exert pressure against the door, but permits separation of the door from the frame and flexure of the door to vent arc gases.