HAND WINCH Russian patent published in 1997 - IPC

FIELD: mechanical engineering; materials handling facilities. SUBSTANCE: winch has housing 1, drive worm installed in housing 1, worm wheel 5, traction wire rope 7 coupled with worm wheel, and lock 8 installed from outside of housing 1. Drive of worm 4 is made in form of chain 9 engaging with sprocket 10 secured on shaft 11 of worm 4. Lock 8 is made in form of cylinder enclosing sprocket 10 with clearance and secured on housing 1. Cylinder has side surface cut over chord below cylinder axis, with tooth on each end of cut for engagement with drive chain 9 of worm 4 when chain 9 curves square to its vertical strand. EFFECT: enlarged operating capabilities. 3 dwg