Back to results
US 11,829,164 B2Granted
Door closer with power close
AssigneeASSA ABLOY Accessories and Door Controls Group, Inc.
InventorDustin Lawhon
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeASSA ABLOY Accessories and Door Controls Group, Inc.
InventorDustin Lawhon
Estimating the term…
A door closer may utilize a door closing device (e.g., spring) and a force adjustment device (e.g., a motor) in order to allow for manual door opening and assisted door closing. During operation, as a door is manually opened, the spring is loaded (e.g., compressed or tensioned) above its pre-loaded closed position state. Once manual opening is completed, the spring that is loaded during opening begins returning to the pre-loaded closed position state, and thus, moves the door automatically towards the closed position. Depending on the pre-loaded spring setting, the closing force of the door may not be enough to close the door, or to close the door with the preferred force. As such, during closing a controller may engage a motor not to drive the door directly, but to increase the pre-load of spring to increase the closing force in order to allow the door to close as preferred.
A door closer, the door closer comprising:
A method of operating a door using a force adjustment device operatively coupled to a closing device, wherein the closing device is located at least partially within a casing and the force adjustment device comprises a motor and is located outside of the casing, the method comprising:
An apparatus for aiding a closing device of a door closer, the apparatus comprises:
Dependencies are inferred from the claim text.