| 摘要 |
A chain winch 10 having a sprocket wheel 14 of polygonal cross-section with flat faces 32 dimensioned in dependence on the dimensions of a link chain to be used therewith and having pin formations 36 for engaging between or in chain links. The winch includes a self latching pawl 48 engageable with the chain links and a braking mechanism 16 for controlled unwinding when required in use. The winch is simple and inexpensive and the sprocket tolerant of chain dimensions so that it can be used with uncalibrated chain. This winch, amongst other things, has application for permanent fitting to a tire chain for tensioning it on to a tire. |
