Back Frame
The vertical portions of the carriage on cantilever
Freightlift.
Back Stop
A back stop panel is installed opposite the loading edge of a
VRC platform to prevent a load from falling to the lower
level.
Baffle
A device, usually a plate, installed in a reservoir to
separate the pump inlet from return lines.
Ball Screw
Rotary to linear motion conversion device, usually
electric.
Ball Transfer Surface
Ball type conveyors built into platform, either fixed or
retractable.
Base Frame Build Up
Increases lowered height and provides under-clearance.
Bearing
A load support that provides for relative motion between the
load and the support.
Bearing Load
The load supporting machine element.
Beveled Toe Guards
According to ANSI MH29-1, "A toe guard plate not less than 8
inches (20.3 cm) in width shall be provided on all unprotected
sides as a physical alert. It shall be made of steel, not less than
No. 11 gauge (3 mm) in thickness, or other material of equal
rigidity, attached flush with the vertical edge of the platform,
and slanted inwardly at an angle of approximately 30 degrees from
vertical."
Bleed-Off
To divert a specific controllable portion of pump flow
directly back to reservoir.
BOM
Bill of Materials for a job or part. The list of all
components used for a specific assembly.
Breather
A device, which permits air to move in and out of a reservoir
or component to maintain atmospheric pressure. (Prevents a
vacuum)
Break Over (Bridge / Ramp)
A device hinged to a lift platform which can be raised or
broken over when the platform is being raised or lowered.
Bushing
A metal lining for reducing friction on moving parts.
By-Pass
A secondary passage for fluid flow.
Cable Reaving
The routing of the wire rope on a Freightlift.
Cam Follower
A wheel or roller used to carry the capacity of a lift or
turntable on a surface.
Cantilever
A style of Vertical Reciprocating Conveyor where the carriage
rides along two masts that are mounted on the same side of the
carriage. This style lift will accommodate all three loading
patterns.
Capacity, Lifting
The rated capacity of a scissors lift applied as a uniformly
distributed load while the platform is raising or lowering.
Capacity, Rated
The maximum load which can be applied to the platform
according to the manufacturer's specification.
Capacity, Rollover
The maximum amount of single axle load which can be rolled
over the platform surface when the lift is in its fully closed
position.
Carriage
The entire assembly that travels in the mast and carries the
load.
Cartridge
- The replaceable element of a fluid filter.
- The pumping unit from a vane pump, composed of the rotor, ring,
vanes and one or both side plates.
Casters
Fixed or swivel, can be positioned in a variety of
configurations for portability and transportability.
Center of Gravity
Location thru which the entire mass of an object can be
resolved.
Check Valve
A valve, which permits flow of fluid in one direction
only.
Circuit
An arrangement of components interconnected to perform a
specific controlling function within a system.
Clevis
A structural-mounting device used in scissors lifts (used in
attaching platform to legs and legs to base.
Compressibility
The change in volume of a unit volume of a fluid when it is
subjected to a unit change in pressure.
Contactor
Electrical device that is specifically sized for a
Motor.
Continuous Running Motor
A motor which remains running even when the lift is not in
use.
Continuous Duty
The motor is rated to run continuous, although it may also be
used intermittently.
Controls
Any electrical device used in the operation of a Lift normally
includes push button stations, control box, limit switches,
interlocks, etc.
Controls by Others (CBO)
Controller and Control signaling device (Push-button,
Footswitch, etc.) are supplied by others.
Control Signaling By Others (CSBO)
The controller is supplied by Autoquip, but the control
signaling device, (push-button, footswitch, etc.) is supplied by
others.
Controlled Issue
A drawing that is released to Manufacturing for them to keep
and release to shop floor as needed.
Controller
The assembly of electrical components which transforms primary
voltage to secondary voltage and controls the functions of the
motor and the control valves.
Control Transformer
An electrical component which alters (reduces) the primary
voltage.
Control Voltage
The secondary voltage, which comes from the transformer to the
push-button.
Controls – Press and Hold
These operator controls shall:
- Be of the type when pressed will make the scissors lift
operate.
- Be of the type when released the scissors lift will
stop.
- Return to the off position when released.
- Be clearly marked as to direction and function.
- Be protected from inadvertent operation.
- Be readily accessible to the operator.
Controls – Press and Release
Push button control which can be pushed to activate and
released, travel ceases automatically at preset level
These operator controls shall:
- Be of the type that when pressed will make the scissors lift
operate.
- Be of the type that will continue to operate the scissors lift
until stopped by another control device.
- Return to a neutral position when released.
- Include an emergency stop device that deactivates all powered
functions that affect scissors lift movement.
- Be protected from inadvertent operation.
- Be readily accessible to the operator.
- Not to be used on industrial scissors lifts that allow
operators and/or riders.
Controls - Constant Pressure
A pushbutton control of travel which when finger is removed
from button, travel stops.
Conveyor, Vertical Reciprocating
Vertical Reciprocating Conveyors, VRC, Material Lifts, or
Freight lift provide the most economical, dependable, and safe
method of high capacity freight movement between multiple levels
with the smallest platform size or footprint possible. An
economical alternative to expensive freight elevators or fork
trucks, Autoquip VRC Material Lifts can be customized to improve
freight and goods transfer and storage in any application:
industrial mezzanines, retail stores, restaurants, warehouses,
conveyor systems, and much more. Hydraulic designs are limited to
travels of 28 feet of travel, where mechanical VRC lifts can travel
up to 100 feet. Each Autoquip Freight lift is designed and
manufactured to meet or exceed the requirements of ASME B20.1 -
Safety Requirements for Conveyors and Related Equipment.
Counterbalance Valve
A pressure control valve which maintains back pressure to
prevent a load from falling.
Critical Components
Those components whose absence or failure would cause the
equipment of which they are a part of to become inadequate or
unsafe for its specific purpose.
Cycle
A cycle is a period of time between motor
starts.
Cylinder
A device, which converts fluid power into linear force and
motion. It usually consists of a movable element such as a
piston and piston rod, plunger or ram, operating within a
cylindrical bore.
Cylinder, Double Acting
A cylinder in which fluid force can be applied to the
movable element in either direction, typically used when
application requires control of both up and down action.
Cylinder, Direct Acting
The cylinder or ram transmits lifting force directly to
the carriage rather than through the use of cables, sheaves or
chains.
Cylinder, Ram
A cylinder in which the movable element has the same cross
sectional area as the piston rod.
Cylinder, Single Acting
A cylinder in which the fluid force can be applied to the
movable element in only one direction.
Cylinder, Single Rod
A cylinder with a piston rod extending from only one
end.