TODAY’S PATENT – CYLINDRICAL LOCK

The CYLINDRICAL LOCK was invented by  Joseph M. Genakis (Worcester, MA) on the 12^th of June 1990 , bearing patent number US4932229A.

This invention relates generally to a cylinder lock and, more particularly, to a cylinder lock having pin tumblers axially and rotationally controlled by a proper key.

The invention is an improved cylinder lock in which at least one tumbler assembly includes a pin tumbler supported for rotational movement about its axis within a tumbler way, a driver, and a coupling mechanism releasable coupling the driver to the pin tumbler for rotational movement of the driver about its axis in response to said rotational movement of the pin tumbler. The invention further encompasses a method of producing a cylindrical lock of the above type and in which driver pins are provided with a plurality of a distinct driver stops each for providing a different limitation on rotational movement of the driver pin within a tumbler way and including the steps of removing from each of the driver pins all except one of the steps particularly related to an associated pin tumbler..