Electro-mechanical lock core with a cam member tailpiece

An electro-mechanical lock core, comprising:

• a lock core body having a longitudinal axis;
• a drive member supported by the lock core body and moveable relative to the lock core body;
• a cam member tailpiece operatively coupled to the drive member and rotatable by the drive member, the cam member tailpiece being positionable by the drive member in a first cam member tailpiece position longitudinally in line with a catch and in a second cam member tailpiece position wherein the cam member tailpiece is longitudinally unaligned with the catch;
• an indexer operatively coupled to the drive member such that rotation of the drive member causes rotation of the indexer;
• wherein the indexer comprises a first collar and a second collar, each comprising a protrusion biased into a first position, wherein the protrusions are extendable into a plurality of openings of the lock core body;
• and
• an electro-mechanical drive assembly including a clutch moveable between a first clutch position, wherein the clutch is operatively disengaged from the drive member, and a second clutch position, wherein the clutch is operatively engaged to the drive member.

A method of unlocking a barrier, the method comprising the steps of:

• holding a cam member tailpiece of a removeable lock core in a first cam member tailpiece position, wherein a portion of the cam member tailpiece is aligned with a catch of the barrier;
• providing an operator actuatable assembly supported by the removeable lock core, a clutch of operator assembly operatively coupled with the cam member tailpiece through a drive member, an indexer operatively coupled to the drive member such that rotation of the drive member causes rotation of the indexer, wherein the indexer comprises a first collar and a second collar, each comprising a protrusion capable of extending into a respective one of a plurality of openings of the lock core, the clutch having an engaged state, wherein an operator actuatable input is operatively coupled with the drive member, and a disengaged state, wherein the operator actuatable input is not operatively coupled with the drive member, wherein rotation of the operator actuatable input when the clutch is in the engaged state causes rotation of the drive member from a first position of the drive member to a second position of the drive member, each of the first position of the drive member and the second position of the drive member defined by an orientation of a plurality of bearings, and wherein rotation of the drive member from the first position of the drive member to the second position of the drive member causes rotation of the cam member tailpiece from the first cam member tailpiece position to a second cam member tailpiece position, wherein the portion of the cam member tailpiece is no longer aligned with the catch of the barrier;
• communicating credential information between an electronic controller of the removable lock core and a portable user device to move the clutch to the engaged state;
• and
• rotating the operator actuatable input.