Definitions for "Chain hoist"
Keywords:  hoist, truss, lift, gear, verlinde
Electrically operated lifting devices.
Adds mechanical advantage to manually operated doors. Couples to one end of the solid torsion shaft. (Commercial door application)
A mechanical device to assist in raising and lowering the door by use of hand chain and gear or sprocket reduction.
Keywords:  torque, counter
Keywords:  pulley, joined, loop, pulled, together
a pulley system joined together by a closed loop of chain that is pulled by hand
Keywords:  plate, cover
Keywords:  wear, subject, machine, moving, parts
a machine that has moving parts that are subject to wear