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. 20, 1981
Filed:
Aug. 23, 1979
Applicant:
Inventor:
John C Herrmann, Los Angeles, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05G / ;
U.S. Cl.
CPC ...
109 64 ; 70-15 ;
Abstract
A safe door bolt is rendered substantially punch-proof by providing as a part of the bolt a hardened plug. This plug has a tapered portion positioned to cause radial expansion of material forming part of the bolt in response to an end blow delivered to the bolt attempting to retract the same into the door. Thus, any force in the form of a sudden axial blow to the end of the door bolt by a burglar will result in the radial expansion of material of the bolt to block its retraction into the guide bore of the safe door thereby frustrating burglary attempts.