1) Vacuum lifter
A lifting device utilizing the creation of vacuum to attach itself to an object via the use of an electric-powered extraction pump and sealed pads.
Generally suspended from a hoist/crane, manipulator, balancer, or positioner. Often attaches to the lifting mechanism by means of a bail and hook arrangement or is an integral part of the positioning and lifting mechanism.
2) Vertical creep
Extremely slow speed movement of a scissors lift that is the result of normal, internal leakage of fluid control valves.
3) Vertical lift module
A Vertical Lift Module, or VLM is a storage system that consists of two parallel columns each of which is divided into fixed shelf locations that can hold a single storage module such as a tray or tote. The shelving locations are single deep. A tray or tote is inserted, extracted and transported between storage levels and picking locations via an elevator-like device with an automatic shuttle that travels up and down within the space between the storage columns. See also Carousels and/or AS/RS .
4) Vertical travel
The difference between the fully raised height of the platform deck and the fully closed height of the platform deck on a scissors lift.
5) Walkie stacker
A power operated device controlled by an operator standing behind it, which lifts, stacks, and transports pallets.
6) 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.
7) Wire rope puller
A lever operated manual device, utilizing wire rope, used to lift, lower, or pull a load and to apply or release tension. See Ratchet lever hoist .
8) Work station crane
An overhead crane generally used for ergonomic purposes and consisting of bridge(s) and runways made from enclosed metal track. End trucks attached to the bridge girder allow for ease of movement. The entire system is designed to allow workers to move loads by hand pushing the load with the assistance of a vertical lifting device such as a hoist or vacuum lifter.