Patent ID: 11820631

Abstract:
A lift device comprises a base, a retractable lift mechanism, a work platform, a linear actuator, and a lift controller. The retractable lift mechanism has a first end coupled to the base and is moveable between an extended position and a retracted position. The work platform is coupled to and supported by a second end of the retractable lift mechanism. The linear actuator is configured to selectively move the retractable lift mechanism between the extended position and the retracted position. The linear actuator comprises a central screw rod, an electric motor configured to provide rotational actuation to the central screw rod, and a nut assembly configured to translate the rotational actuation of the central screw rod into linear motion. The lift controller is configured to receive a lift command from an operator, monitor at least one lift characteristic associated with the linear actuator, and selectively inhibit the lift command.