Patent ID: 11898373
Assignee: DORMAKABA USA INC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A motorized latch retraction system for transitioning a latch of an exit device from a latched position to an unlatched position, the motorized latch retraction system comprising:
a retraction assembly including a guide structure configured to be coupled to the exit device, the retraction assembly having a retraction arm operably coupled to the latch of the exit device, and the retraction arm moveable relative to the guide structure between a first position corresponding to the latched position of the latch and a second position corresponding to the unlatched position of the latch, wherein movement of the retraction arm from the first position to the second position effects movement of the latch from the latched position to the unlatched position; and
a motor assembly including:
a floating motor configured for movement relative to the guide structure;
an actuator operably engaged with and extending linearly from the floating motor and actuatable by the floating motor, the actuator operably coupled to the retraction arm to actuate the retraction arm and the latch;
a restrictor fixedly positioned relative to the guide structure of the retraction assembly, the restrictor defining a floating restrictor space, the floating motor positioned within the floating restrictor space, the restrictor having guide surfaces for limiting rotational or linear movement of the motor in a first predefined dimension; and
a resilient restraint operably coupled to the floating motor and operable to selectively restrain the floating motor in a second predefined dimension when the retraction arm is not in the second position and to selectively permit the floating motor to move in the second predefined dimension within the restrictor space when the retraction arm is in the second position;

wherein the configuration of the floating motor, the actuator, and the restrictor is such that when the floating motor actuates the actuator, the floating motor is operable to linearly translate within the restrictor space when the retraction arm is in the second position.