US 12,031,371 B2
Swing door operator operable in powered and powerless mode
Sven-Gunnar Soderqvist, Vallakra (SE)
Assigned to Assa Abloy Entrance Systems AB, Landskrona (SE)
Appl. No. 17/615,632
Filed by Assa Abloy Entrance Systems AB, Landskrona (SE)
PCT Filed Jun. 4, 2020, PCT No. PCT/EP2020/065466
§ 371(c)(1), (2) Date Dec. 1, 2021,
PCT Pub. No. WO2020/249456, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 1930189-4 (SE), filed on Jun. 13, 2019.
Prior Publication US 2022/0307313 A1, Sep. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. E05F 15/00 (2015.01); E05F 1/10 (2006.01); E05F 15/63 (2015.01); H02P 3/12 (2006.01); H02P 7/03 (2016.01)
CPC E05F 15/63 (2015.01) [E05F 1/105 (2013.01); H02P 3/12 (2013.01); H02P 7/04 (2016.02); E05Y 2201/434 (2013.01); E05Y 2201/46 (2013.01); E05Y 2201/474 (2013.01); E05Y 2400/35 (2013.01); E05Y 2400/40 (2013.01); E05Y 2400/44 (2013.01); E05Y 2400/616 (2013.01); E05Y 2800/11 (2013.01); E05Y 2800/25 (2013.01); E05Y 2900/134 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A swing door operator for moving at least one door leaf between a first position (O) and a second position (C), the swing door operator being arranged to operate in a powered mode and a powerless mode and comprising:
a permanent magnet DC motor, arranged to move the door leaf at least from the second position (C) to the first position (O) in the powered mode,
a mechanical drive unit, arranged to move the door leaf from the first position (O) to the second position (C) in the powerless mode, and
in the powerless mode, at least one resistive device electrically connected in parallel with the permanent magnet DC motor and arranged to limit a current generated by the permanent magnet DC motor in response to the movement of the door leaf from the first position (O) to the second position (C) by means of the mechanical drive unit.