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. 10, 1995
Filed:
Mar. 01, 1993
Dimiter S Zagoroff, Cambridge, MA (US);
Steadfast Corporation, Chelsea, MA (US);
Abstract
An anti-theft device surrounds the plastic housing for the ignition switch, the protruding plastic lock barrel and the exposed end of the lock cylinder with hardened steel. The device consists of (i) a hardened steel bracket which attaches directly to the housing and the steering column with screws, (ii) a cup-like cover which attaches to the bracket, covering the housing, the screws and the protruding lock barrel with hardened steel, and (iii) a torque-sensitive end cap which is rotateably supported by the cover. The torque-sensitive cap consists of an outer sleeve and a center disk press fit into the sleeve. The disk includes a key slot for access to the lock cylinder. The disk is the same size as an opening in the cover, which accommodates key access to the lock cylinder. The sleeve is rigid and larger in diameter than the opening. An indentation in the cap sleeve engages a boss on the lock cylinder to align the slot in the disk with the lock cylinder keyhole and operate the lock. If a thief attempts to insert a screwdriver through the slot to rotate the cap and force the rotation of the lock cylinder, the disk alone rotates without operating the lock cylinder.