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:
Feb. 15, 1977
Filed:
Oct. 20, 1975
Paul D Gernhardt, Newton, KS (US);
Slater Electric Inc., New York, NY (US);
Abstract
Knockout window means include a knockout port formed primarily in a sidewall of an electrical assembly box and a knock-out panel superposed over the knockout port from the inside of the sidewall. The knockout panel is attached only at its front and back ends to the box, the front end being connected to the inside surface of the sidewall and the back end being connected to the backwall, each by a frangible web which provides doubly accessible panel removal slot means between each end of the knock-out panel and the structure to which each is attached. The panel removal slot means are accessible from both the outside and the inside of the assembly box at each end of the knockout panel, and include four pairs of bearing surfaces against which a wedge-like tool may bear for applying twisting leverage to fracture the webs. Abutment means may be formed on the inside surface of the backwall, and the frangible web thereat may be formed generally continuous with the inside of the backwall to provide panel removal slot means of relatively enlarged depth at back end of the knockout panel. The electrical assembly box, knockout panels and frangible webs may be integrally molded in a unitary structure.