Posts by Caterpillar:

Cat® Dynamic Hoist Brake for Electric Rope Shovels

The Dynamic Hoist Brake is designed to stop the dipper from dropping during an uncontrolled event such as a power drop or an emergency stop. The new brake is designed to perform and survive a full speed dynamic brake event with a fully loaded dipper and, as a result, to minimize the risk of an uncontrolled dipper drop.