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:
Apr. 24, 1990
Filed:
Feb. 13, 1989
Lloyd S Binns, Harbor City, CA (US);
Hi-Shear Corporation, Torrance, CA (US);
Abstract
A blind fastener with an axially extending sleeve having an axially extending internally threaded passage therethrough. A head at one end has an axially facing surface thereon with a periphery which is centered on its axis. A mandrel includes an axially extending threaded shank that is threaded into and through the passage. A torque-off groove is formed on the shank. Torque tool engaging surfaces are accessible at the head end of the sleeve, and blind upsetting structure is axially movable by rotating the mandrel to form an enlarged body at the unheaded end of the sleeve. A nut is threaded to the mandrel with a bearing face facing toward the surface of the head of the sleeve. The bearing face of the nut is concavely shaped so as to make contact with and thereby to make a retention engagement with at least some points around the periphery to hold the sleeve against rotation relative to the nut when the mandrel is drawn into the sleeve with the nut pressed against the head.