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:
Mar. 18, 1980
Filed:
Aug. 03, 1978
Larry K Johnson, Sterling, IL (US);
Lawrence Brothers, Inc., Sterling, IL (US);
Abstract
There is disclosed a door frame construction, preferably of metal, which comprises cross channel members assembled perpendicularly with a pair of parallel upright channel members to form a rectangular frame. The respective channel members are held in assembled squared relation by a novel type of joint construction, which joint includes a pair of elongate slots formed in ones of the channel members which slots cooperating receive first detent members formed on the other of the channel members. The first detent members prevent disassembly of the joined channel member in a generally lateral direction. In addition, said slot also cooperates with second detent members received therein, which preclude relative pivotal movement between the assembled channel members and thereby serve to maintain the channel members in squared relation.