Glossary


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1) Hoists

A suspended machinery unit that is used for lifting or lowering a freely suspended (unguided) load.  May be manually operated or electrically or pneumatically driven and may use chain or wire rope as its lifting medium.

2) Trolley hoist

A hoist suspended from a trolley.  A hoist can be connected to a trolley by hook or clevis, or a hoist can be integral with the trolley.

3) Chain hoist

Generally, any hoist which utilizes link or roller chain as its lifting medium.  Chain hoists can be manually operated  (hand or lever), pneumatically driven, or electrically driven.

4) Pneumatic hoist

A motor driven hoist whose power is derived from pneumatically powered motors.  These hoist are often used in areas where electrical sparks are undesirable due to the possibility of explosion of fumes or materials.

5) Air hoist

A suspended machinery unit that is powered by pneumatically driven motors and is used to lift or lower a freely suspended (unguided) load.  Generally uses chain or wire rope as its lifting medium.

6) Ratchet hoist

A lever operated manual device used to lift. lower, or pull a load and to apply or release tension.  Utilizes a ratchet and pawl mechanical configuration to incrementally raise or lower a load or to apply or release tension.

7) Electric Hoist

A suspended machinery unit that is powered by electrically driven motors and is used to lift or lower a freely suspended (unguided) load.  Generally uses chain or wire rope as its lifting medium.

8) Manual hoist

A suspended machinery unit that, by use of manual operation, is used for lifting and lowering of a freely suspended (unguided) load.  Generally uses chain (roller or link) as its lifting medium

9) Lever hoist

A lever operated manual device used to lift. lower, or pull a load and to apply or release tension.  Utilizes a ratchet and pawl mechanical configuration to incrementally raise or lower a load or to apply or release tension.

10) Strap hoist

A lever operated manual device, utilizing polyester or nylon straps as the lifting medium, used to lift, lower, or pull a load and to apply or release tension.

11) Hoist Manufacturers Institute

The Hoist Manufacturer's Institute, an affiliate of Material Handling Industry, is a trade association of manufacturers of overhead handling hoists.  The products of its member companies include hand chain hoists, ratchet lever hoists, trolleys, air chain and air rope hoists, and electric chain and electric wire rope hoists.    Hoist Manufacturers Institute 8720 Red Oak Blvd., Suite 201 Charlotte, NC 28217    Phone:  704-676-1199  Fax: (704) 676-1199 Hal Vandiver, Managing Director hvandiver@mhia.org

12) Wire rope hoist

A hoist that utilizes wire rope as the lifting medium. Often powered electrically or pneumatically. This lifting device is made up of a rope storage drum, motor(s), gear box and braking system and is suspended from a monorail or bridge beam(s) by means of a trolley.  May also be mounted in a staionary manner. Manual wire rope hoist are generally referred to as "pullers" and operate utilizing a ratchet and pawl tensioning technology.

13) 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.

14) Air wire rope hoist

A pneumatically driven machinery unit, utilizing wire rope 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.

15) Ratchet lever hoist

A lever operated manual device used to lift. lower, or pull a load and to apply or release tension.  Utilizes a ratchet and pawl mechanical configuration to incrementally raise or lower a load or to apply or release tension.