Mine Hoist in Motion.wmv

This is a personnel and equipment hoist that I designed for a coal mine in West Virginia. The hoist is 40000 pound rope pull at at 500 feet a minute. There are two seperate spring applied brakes. Normal stopping and starting is very smooth and repeatable. I believe several safety features are unique to my design. The hoist will automatically take up slack if the magnetic brake car stops on the slope. There is a quick acting slack rope switch. A torque slip clutch protects against an overhauling shock load, and is rated 4x normal torque, while the yield strength of all the mechanical components is 7x normal full load torque. Contact me at Chief.Engineer@mine-hoist-consulting.com