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. 16, 1990
Filed:
Feb. 09, 1989
Francis G Frano, Hoffman Estates, IL (US);
Illinois Tool Works Inc., Chicago, IL (US);
Abstract
A twistlock fastener is constructed of a latching member and a base member. The base member has a socket portion with a square-shaped internal bore. The latching member is formed with head portion and a shank portion. The shank portion has a cylindrical section adjacent to the head portion and has a pair of resilient bifurcated leg elements integrally formed with the cylindrical section. Each of the leg elements have a radial surface to provide a latching shoulder. Each latching lateral shoulder is formed with a width sufficient to retain the shank portion in the square-shaped internal bore. Each of the opposite side surfaces at the opposite ends of the latching shoulder for both leg elements lie in a common flat plane which is perpendicular to the latching shoulders. The surface on each of the leg elements that extends axially from and adjacent to each latching shoulder is flat, and the corner surfaces along each of the leg elements adjacent to each of the opposite side surfaces are rounded along the length of the leg elements.