Electric Door Release Powered by Energy Harvester

An electric door release system for use in securing a door hinged in a frame, comprising:

• a) an energy harvester;
• b) a voltage boost circuit operationally connected to said energy harvester;
• and
• c) a mechanical door lock including a piezoelectric actuator connected to said voltage boost circuit.

A door security system comprising:

• a) a door hinged to a frame;
• b) a electrical door release mounted on one of said door and said frame and including a piezoelectric actuator;
• c) a voltage boost circuit operationally connected to said piezoelectric actuator;
• d) an energy harvester mounted to one of said door and said frame and connected to said voltage boost circuit;
• and
• e) a mechanical actuator assembly mounted for stimulating said energy harvester when said door is pivoting on its hinge.

An electric door strike comprising:

• a) a keeper movable between a first position and a second position;
• and
• b) a piezoelectric actuator blockable by a piezo cell in said piezoelectric actuator between a first position and a second position,
• wherein when said piezoelectric actuator is in said first position, said keeper is prevented from moving from said first position to said second position, and
• wherein when said piezoelectric actuator is in said second position, said keeper is permitted to move from said first position to said second position.

A handle-lock set, comprising:

• a) a lock integral with a locking shaft;
• b) a rotatable handle integral with a latch engaging shaft;
• c) a cam mounted on said locking shaft;
• d) a hub having a ramp;
• and
• d) a floating tab operable by said cam and comprising an assembly including a piezoelectric actuator and a plunger engagable with said ramp,
• wherein de-energizing of said piezoelectric actuator causes said plunger to prevent rotation of said latch engaging shaft, and
• wherein energizing of said piezoelectric actuator enables rotation of said latch engaging shaft.