Granted Patent B2

US 12,729,564 · App. 18/150,061 · Granted Sep 8, 2026

Inventors: Kabir Zachary Maiga (Superior Township, MI); Philip Michael Johnson (Plymouth, MI); Simon Forster (Cologne, DE)

Assignee: Passive Bolt, Inc.

E05B47/026E05B47/0005E05B47/0038E05B47/0615E05B2047/0018E05B2047/0028E05B2047/0084

Abstract

Claims (24)

1 . An electronic door lock in combination with a deadbolt lock located on a hinged door of a building structure and having a bolt that is extended and retracted by rotation of a spindle, the electronic door lock comprising:

a stator assembly having windings that are operated to produce magnetic fields;

a rotor assembly having a shaft and permanent magnets rotationally fixed to the shaft and that cooperatively rotate relative to the stator assembly, the magnetic fields of the windings interacting with the permanent magnets to cause rotation of the rotor assembly relative to the stator; and

a cover:

wherein the permanent magnets are positioned radially outward of the windings; and

wherein the shaft extends axially through the stator assembly radially inward of the windings and is rotationally supported by the stator assembly, and a distal end of the shaft is configured to rotationally couple to the spindle of the deadbolt lock to rotate the spindle in a 1:1 drive ratio with the rotor assembly to, thereby, extend and retract the bolt;

wherein the electronic door lock does not include a gear reduction for rotating the spindle;

wherein the electronic door lock is coupleable to the hinged door such that the electronic door lock moves with the hinged door as the hinged door is rotated about a hinge axis;

wherein the rotor assembly further includes a rotor sleeve to which the permanent magnets are coupled, a rotor shaft assembly, and a thumb turn;

wherein the rotor shaft assembly includes a rotor flange that is coupled to, extends radially between, and transfers torque between the rotor sleeve and the shaft;

wherein the rotor flange includes a proximal face and a distal face opposite the proximal face, the thumb turn being coupled to a protrusion extending axially from the proximal face and being configured to be physically engaged by a user to rotate the rotor assembly, and the shaft extending axially from the distal face; and

wherein the cover is arranged between a motor, formed by the stator assembly and the rotor assembly, and the thumb turn, and the protrusion is axially aligned with the shaft and extends from the proximal face in a direction opposite the shaft through an aperture of the cover to be coupled to the thumb turn.

2 . The electronic door lock according to claim 1 , further comprising an adapter and a chassis;

wherein the adapter is rotationally coupled to the distal end of the shaft and rotationally coupleable to the spindle of the deadbolt lock, the adapter being configured to extend axially between and transfer torque between the distal end of the shaft and the spindle, and rotate the spindle at the 1:1 drive ratio with the shaft and the adapter;

wherein the stator assembly further includes a core and stator carrier, the core including a central aperture and radially extending teeth about which each of the windings is formed;

wherein the stator carrier includes a carrier flange, a tubular portion coupled to the carrier flange, and one or more bearings, the tubular portion extending axially through the central aperture of and being rotationally fixed to the core, the carrier flange extending radially outward from the tubular portion and being coupled to the chassis, and the one or more bearings being located within the tubular portion and rotationally supporting the shaft relative to the stator assembly.

3 . The electronic door lock according to claim 1 , further comprising an adapter that is rotationally coupled to the distal end of the shaft and rotationally coupleable to the spindle of the deadbolt lock, the adapter being configured to extend axially between and transfer torque between the distal end of the shaft and the spindle.

4 . The electronic door lock according to claim 3 , wherein the shaft is configured to rotate the spindle at a 1:1 drive ratio therewith.

5 . The electronic door lock according to claim 1 , further comprising a chassis;

wherein the stator assembly further includes a core and stator carrier;

wherein the core includes a central aperture and radially extending teeth about which each the windings is formed; and

wherein the stator carrier includes an axially-extending portion and a radially-extending portion coupled thereto, the axially-extending portion extending axially through the central aperture and being rotationally fixed to the core, and the radially-extending portion extending radially outward from the axially-extending portion and being coupled to the chassis.

6 . The electronic door lock according to claim 5 , wherein the stator assembly further includes a first bearing and a second bearing that rotationally support the shaft of the rotor assembly, the first bearing being located within another proximal end of the axially-extending portion, and the second bearing being located within another distal end of the axially-extending portion near the radially-extending portion.

7 . The electronic door lock according to claim 1 , wherein the rotor shaft assembly includes the shaft.

Assignments (1)

Continuity (2)

References Cited (41)