Patent attributes
A locking mechanism for a bored lock has a lock chassis, a locking element, a motor housing, a reversible electric motor, an auger, and a spiral lock spring disposed between the locking element and the motor. The motor may drive the auger in a first or second rotational direction to move the spring towards/away from the motor to reduce/increase spring force on the locking element, thereby moving the locking element to an unlocked/locked position. One of the locking element and motor housing has a projection while the other has a guideway for slideably receiving the projection. The guideway prevents rotation of the locking element with respect to the motor as it moves between locked and unlocked positions. The projection and guideway are interlocked to prevent disassembly of the locking element and motor housing.
