1) Air chain hoist
A pneumatically driven machinery unit, utilizing chain as its lifting medium, and used for the lifting and lowering of a freely suspended (unguided)load. Often used in environments that require electric spark avoidance due to a potentially explosive atmosphere.
2) Hoist Manufacturers Institute (HMI) Industry Group
The Hoist Manufacturers Institute (HMI) members are the Industry’s leading suppliers of hoisting equipment including hand chain hoists, ratchet lever hoists, trolleys, air chain hoist, air wire rope hoists, electric chain hoists, and electric wire manufacturing and distribution sector.