US 12,252,920 B2
Device for assisting door opening
Cédric Meilhan, Fourmagnac (FR); and Bertrand Prouzet, Figeac (FR)
Assigned to RATIER-FIGEAC SAS, Figeac (FR)
Filed by Ratier-Figeac SAS, Figeac (FR)
Filed on Mar. 30, 2022, as Appl. No. 17/708,076.
Claims priority of application No. 21315058 (EP), filed on Mar. 30, 2021.
Prior Publication US 2022/0316255 A1, Oct. 6, 2022
Int. Cl. B64C 1/14 (2006.01); E05F 3/04 (2006.01); E05F 15/611 (2015.01)
CPC E05F 15/611 (2015.01) [B64C 1/1407 (2013.01); E05F 3/04 (2013.01); E05Y 2201/21 (2013.01); E05Y 2201/254 (2013.01); E05Y 2201/434 (2013.01); E05Y 2201/686 (2013.01); E05Y 2201/706 (2013.01); E05Y 2400/36 (2013.01); E05Y 2400/44 (2013.01); E05Y 2600/41 (2013.01); E05Y 2900/502 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A device for assisting the opening and closing of a door in a structure, the device comprising:
a door shaft configured to rotate about a longitudinal axis thereof in a first direction and in a second opposite direction,
and configured to be mounted to the structure to form a hinge about which the door may rotate in both the first and second directions relative to the structure;
a first actuator linked to the door shaft and configured to control a speed of rotation of the door shaft in the first direction; and
a second actuator linked to the door shaft and configured to drive rotation of the door shaft in the second direction, wherein the second actuator is an electromechanical actuator;
a controller adapted to control the second actuator to control the speed of rotation of the door shaft;
a sensor for sensing the extent of rotation of the door, the controller being adapted to control the second actuator to change the speed of rotation of the door shaft based on the sensed extent of rotation of the door shaft;
wherein the first actuator comprises a hydraulic actuator comprising a damping system for controlling the speed of rotation of the door shaft in the first direction;
wherein the hydraulic actuator further comprises an accumulator for storing at least one of potential energy of the door and energy generated while the door is moving in the first direction, the accumulator fluidly connected to a first cylinder of the hydraulic actuator and includes a second cylinder, wherein hydraulic fluid is flowed between the first cylinder and the second cylinder.