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. 27, 1976
Filed:
Oct. 17, 1974
Morris Falk, Palm Springs, CA (US);
Fort Lock Corporation, River Grove, IL (US);
Abstract
A maximum security padlock of the type having a monolithic lock body or case with a plurality of shackle and lock-receiving bores therein is made of a compressed and sintered powder metal alloy of an austenitic stainless steel. As a consequence of this unique material, the lock body is readily made with most or all of the bores formed in compressing the powder metal. While the resulting sintered lock body is relatively, substantially, softer than a conventional lock body and the shackle, when an attempt is made to saw or otherwise cut through the body the stainless steel work-hardens to resist and slow down further cutting. Improvements in the lock mechanism augment the characteristics provided by powder metal fabrication.