hoist overspeed device

hoist overspeed device

[′hoist ¦ō·vər‚spēd di‚vīs]
(mechanical engineering)
A device used to prevent a hoist from operating at speeds greater than predetermined values by activating an emergency brake when the predetermined speed is exceeded.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.