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. 01, 1980
Filed:
Jan. 23, 1978
Marvin E Roberts, Reno, NV (US);
Other;
Abstract
A lock cylinder incorporating a front retainer for a sidebar and a body counterbore to receive same, a core shell having a torquing engagement extension and an indexing protrusion to properly index the insertion and removal of the core, a torquing tumbler for applying rotational torque to the core, an improved centering spring, an inter-connection of a sidebar and a body engaging link of a removable core differential mechanism, a method of yieldingly biasing the engaging links outwardly from the core assembly, and improved combinating capabilities by arrangements of gatings in the rotary disc-tumblers for variable incrementations and the arrangement of tumblers and spacers of various thicknesses to achieve a variable spacings of the bittings.