A brake/clutch device for a manual hoist provides an externally-viewable indicator showing the wear status of friction elements within the hoist. The brake/clutch device has a brake block, a brake ratchet, a reversing ratchet, a torsion spring block, a hand wheel and a fastener mounted onto a main shaft of the manual hoist. Friction elements on the brake ratchet provide braking against sudden drops of a load. Ball and spring devices mounted in the hand wheel contact detents and grooves that gradually increase in depth in the torsion spring block depending on the relative positions of the hand wheel and the torsion spring block. The hand wheel has an indicator mark that may align with indicator areas of the torsion spring block to indicate an extent of wear of the friction elements

A compact control device for failsafely controlling an electrical actuator capable of moving a movable machine part into a defined end position, has an input connection for receiving an external control signal representing a desired position of the machine part. The compact control device further has an input part for detecting a position signal, which signals an actual position of the machine part at the defined end position. A power section comprises a power switching element for switching on and failsafely switching off a control current for the actuator that is supplied to the electrical actuator via a first output connection. The compact control device has a second output connection for providing an external status signal and an evaluation unit which actuates the power switching element depending on the external control signal and generates the external status signal at the second output connection depending on the position signal.

A compact control device for failsafely controlling an electrical actuator capable of moving a movable machine part into a defined end position, has an input connection for receiving an external control signal representing a desired position of the machine part. The compact control device further has an input part for detecting a position signal, which signals an actual position of the machine part at the defined end position. A power section comprises a power switching element for switching on and failsafely switching off a control current for the actuator that is supplied to the electrical actuator via a first output connection. The compact control device has a second output connection for providing an external status signal and an evaluation unit which actuates the power switching element depending on the external control signal and generates the external status signal at the second output connection depending on the position signal.

A braking system for a gear box assembly is provided. In one example, braking system comprises a double disk brake configuration arranged in a gear housing. A working position of the double disk brake is configured to automatically adjust based on a condition of a friction pad of a friction disk.

A braking system for a gear box assembly is provided. In one example, braking system comprises a double disk brake configuration arranged in a gear housing. A working position of the double disk brake is configured to automatically adjust based on a condition of a friction pad of a friction disk.

A direct drive drawworks having a first electric motor comprising a first output shaft, a second electric motor comprising a second output shaft, and a drum for storing a flexible line. The drum may be disposed between the first electric motor and the second electric motor. The first output shaft and the second output shaft may each be connected to the drum. The first electric motor and the second electric motor may be collectively operable to rotate the drum. The first output shaft and the second output shaft may be connected to the drum such that the drum rotates at the same speed as the first output shaft and the second output shaft.

A hoist brake system is disclosed. The brake system incorporates an electro-mechanical device that acts as a fail-safe stopping mechanism for a hoist and has a default engaged. This allows the brake system to quickly and safely stop a device when power is lost, an emergency signal is provided or any other fault condition and be completely self-contained within the hoist itself.

A hoist brake system is disclosed. The brake system incorporates an electro-mechanical device that acts as a fail-safe stopping mechanism for a hoist and has a default engaged. This allows the brake system to quickly and safely stop a device when power is lost, an emergency signal is provided or any other fault condition and be completely self-contained within the hoist itself.

There is provided a crane winch device allowing a suspended load to freely fall due to a load thereof. The crane winch device includes a winch drum around which a rope for suspending the suspended load is wound, braking brake unit that brakes the winch drum, speed-increasing unit that performs speed-increasing assist of the winch drum in a direction of free fall acceleration when a braking force of the brake unit is smaller than a first threshold, and an adjustment unit that adjusts the first threshold.

A direct drive drawworks having a first electric motor comprising a first output shaft, a second electric motor comprising a second output shaft, and a drum for storing a flexible line. The drum may be disposed between the first electric motor and the second electric motor. The first output shaft and the second output shaft may each be connected to the drum. The first electric motor and the second electric motor may be collectively operable to rotate the drum. The first output shaft and the second output shaft may be connected to the drum such that the drum rotates at the same speed as the first output shaft and the second output shaft.