The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2024
Filed:
Jun. 04, 2020
Assa Abloy Entrance Systems Ab, Landskrona, SE;
Sven-Gunnar Soderqvist, Vallakra, SE;
Assa Abloy Entrance Systems AB, Landskrona, SE;
Abstract
Provided is a swing door operator () for moving a door leaf () between a first position and a second position. The swing door operator () is arranged to operate in a powered and a powerless mode and comprises a permanent magnet DC motor (). The motor () is arranged to move the door leaf () at least from the second position to the first position in the powered mode. The swing door operator () further comprises a mechanical drive unit (), arranged to move the door leaf from the first position to the second position in the powerless mode. In the powerless mode, at least one resistive device is electrically connected in parallel with the motor () and arranged to limit a current generated by the motor () in response to the movement of the door leaf () from the first position to the second position by means of the mechanical drive unit (). A method for controlling the swing door operator is also provided.