Technology ID

Cable-line Safety System: Electro/hydraulic Emergency Stop Device for a Winch, Drum or Capstan

Lead Inventor
Woodward, Chelsea (CDC)
Bevan, John (CDC)
Miller, Gregory (CDC)
Ruff, Todd (CDC)
Howie, Wayne (CDC)
Lincoln, Jennifer (CDC)
Martin, Lewis (CDC)
Mckibbin, Robert (CDC)
Clark, Curtis (CDC)
Research Materials
Occupational Safety and Health
Non-Medical Devices
Medical Devices
Consumer Products
Development Stages
Development Status
  • In situ data available (on-site)
  • Prototype
Lead IC
This CDC-developed invention entails a system of electrical and hydraulic circuits used to stop a rotating winch in an emergency. Amongst other locations, one stop switch can be positioned on a capstan winch horn. This location makes it available to a victim entangled in rope being retrieved on a gypsy drum. As designed, the stop circuit could be used with an electrically, hydraulically or pneumatically operated winch. A variant of this safety system has been successfully tested on a purse seining fishing vessel in Alaskan waters.
Commercial Applications
  • Retrofitting existing winches for additional safety and adherence to possible future regulations
  • Specifically designed and tested for the marine/fishing industries
  • Applications in mining, construction, forestry, and/or off-road automotive industries
  • Workers' well-being concern groups
  • Insurers of fishing vessels; also mining, construction and forestry operations
  • Manufacturers of cable reel trailers and wire-drawing machinery
Competitive Advantages
  • Complies with numerous international safety regulations requiring winches, drums and capstans to have a master on/off switch in easy reach for worker safety
  • Can be packaged as a ‘retrofit kit’ for integration with current commercial winch/drum usage
Licensing Contact:
Mitzelfelt, Jeremiah