A lift vehicle comprises a base, a battery arranged within the base, a drive motor powered by the battery and configured to drive a wheel, a scissor lift including a first end coupled to the base and being movable between an extended position and a retracted position, a work platform supported by a second end of the retractable lift, and a linear actuator having a lift motor. The lift motor is powered by the battery, and the linear actuator is coupled to the retractable lift so that rotation of the rotor moves the retractable lift between the extended position and the retracted position. The lift vehicle further includes an electromagnetic brake and a centrifugal brake coupled to the lift motor.

A self-operable centrifugally-activated brake system adapted for a wheeled device. The braking system includes a wheel having a hub, a rim, spokes extending between the hub and rim, and a rod extending between the hub and rim. A helical spring surrounds the rod, with a fixed end attached to the hub and a free end movable along the longitudinal direction of the rod. A brake mass structure is attached to the free end of the helical spring and includes a cylindrical pin structure. A main frame connects to the hub of the wheel. An extension structure extends from the main frame and includes a spacing segment and a hook segment having a groove configured to engage with the pin structure.

The disclosure provides a friction disk and a brake including a magnetic yoke iron core, a first movable plate, a friction disk, a first coil, at least one second coil, an armature and an elastic part; the magnetic yoke iron core includes a first mounting space, a second mounting space and at least one third mounting space distributed coaxially; the first movable plate is located in the first mounting space and close to a first shaft end; the friction disk is located in the first mounting space; the first coil is arranged in the second mounting space; the at least one second coil correspondingly is arranged in the at least one third mounting space; the armature is located at the second shaft end; the elastic part has a pre-tightening force that enables the armature to be far away from the magnetic yoke iron core.

A solar tracker centrifugal locking apparatus includes a centrifugal locking device and first and second cable members. Each of the first and second cable members is connected to the centrifugal locking device and configured to connect to a torque tube. The centrifugal locking device is configured such that when the torque tube rotates in a first rotational direction at a rotational velocity below a first direction torque tube rotational velocity threshold, the centrifugal locking device is in an unlocked state to release the first cable member and receive the second cable member. And the centrifugal locking device is configured such that when the torque tube rotates in the first rotational direction at a rotational velocity at or above the first direction torque tube rotational velocity threshold, the centrifugal locking device is in a locked state to prevent further release of the first cable member.

A fully-electric lift vehicle comprises a base, a battery, a scissor lift movable between an extended position and a retracted position, a work platform the scissor lift, a linear actuator including an electric motor powered by the battery, an electromagnetic brake coupled to the electric motor; and a manual release coupled to the electromagnetic brake so that, in the event of a power failure, actuation of the manual release enables the scissor lift to descend toward the retracted position. The electric motor is configured to act like a generator and reduce a descent speed of the scissor lift during the descend toward the retracted position.

A furniture drive includes an electric drive motor and a brake device. The drive motor has an output shaft which projects beyond a motor housing and the brake device has at least one brake element and one force accumulator. The force accumulator permanently loads a friction surface of the at least one brake element with a brake force. The force accumulator and the brake element are configured in one piece. Coefficients of static and sliding friction between the friction surface of the brake element and the output shaft differ by a factor of at least 1.3. An EMF brake is provided for the drive motor.

An actuator primarily activated by transversal acceleration arising from rotational acceleration of a rotatable object is presented. The object is rotatable in a plane of rotation (P) about an object pivot point in the plane of rotation (P). The actuator comprises at least two bodies adapted to be rotatably, in or parallel to the plane of rotation (P), coupled to the object at a body pivot point of each body. The body pivot point and/or the body is arranged such that a mass distribution of the body is nonuniform about the body pivot point. Due to the nonuniform mass distribution about the body pivot point, the actuator is configured to transition to an activated state, in response to rotational acceleration of the object, by the at least two bodies rotating about their respective body pivot points in a direction opposite to a direction of the rotational acceleration of the object.

An inertial latch includes a swash plate, a swing arm. The swing arm can have a first end and a second end, the first end being configured to pivot on the swash plate so that the swing arm moves between a first position and a second position, and the second end comprising a plurality of teeth. The inertial latch can further include a spring that can connect the swash plate and the swing arm. The spring is configured to apply a force on the swing arm to bias the swing arm in a direction towards the first position. The inertial latch can also include a ratchet ring comprising a plurality of teeth configured to be engaged by the plurality of teeth of the swing arm when the swing arm pivots to the second position due to a high acceleration event.