US Patent 11654067 Mobility aid

A mobility aid assembly which may be used for lifting and lowering a user. The assembly includes an articulated lifting arm releasably mounted to a base structure with a first portion of the lifting arm operable between a lowered position and a raised position by a linear actuator. A first end of the linear actuator is pivotally connected to a second portion of the lifting arm with the second end releasably mounted to a second upright portion of the lifting arm. The lower end of the linear actuator disengages from its mounting on the second upright portion when the first portion of the lifting arm is lowered by the actuator to a position in which the first portion of the lifting impinges on the user.