Patent ID: 9677332
Date: 2017-06-13
CPC Classifications: E06B,F16D

Claim:
1. A drive actuator, comprising: a drive motor, including a drive shaft and a motor housing; and a centrifugal brake coupled to the drive motor, the centrifugal brake comprises: a rotational disk coupled to the drive shaft; a friction ring fixed with respect to the motor housing; two or more centrifugal shoes arranged to be radially moveable between an inner position and an outer position and guided in the rotational disk; and at least one spring element urging the centrifugal shoes radially inwardly towards the inner position, wherein the centrifugal shoes engage frictionally or in a positive-locking way with the frictional ring when the drive motor is stationary, and move out of engagement with the friction ring when the drive motor is rotating.