Operator control system
First Claim
1. In an industrial lift truck having at least ground traversing and lifting functions with an operator'"'"'s station, an operator'"'"'s control asembly comprising internal shaft means, said shaft means having a shaft with an outer supporting surface and supported from the operator'"'"'s station and an operator control slidably mounted on said shaft generally centrally thereof when in a neutral position, said operator control being operatively connected to control means to control a plurality of different truck functions, said operator control being actuatable forwardly from neutral position along said shaft means to control by said control means the operation of each of said different truck functions in a first mode and being actuatable rearwardly from neutral position along said shaft means to control by said control means the operation of each of said different truck functions in a second mode.
1 Assignment
0 Petitions
Accused Products
Abstract
An operating control system for a lift truck controlled from a single multi-function operator hand control which is located and designed for improved operator comfort, convenience, simplicity and to reduce operator fatigue. The sole hand control for directional and speed control and the operation of all hydraulic functions of the truck related to the handling of loads is recessed in a compartment adjacent one side of the truck and supported from a control shaft which extends forwardly, leftwardly and downwardly and along which the control handle may be pushed or pulled linearly to control all such hydraulic truck functions. The grip handle is rotatable to control direction and speed of the truck. Switch controls are located conveniently adjacent the one end of the rotatable grip handle for selecting a variety of hydraulic functions by the same movements forwardly and rearwardly of the operator control handle along the control shaft. Electrical and hydraulic systems control the various hydraulic functions and are operatively connected to the control handle for operator selection of direction and speed of the truck as well as simultaneous operation of any selected hydraulic function one at a time only.
30 Citations
34 Claims
- 1. In an industrial lift truck having at least ground traversing and lifting functions with an operator'"'"'s station, an operator'"'"'s control asembly comprising internal shaft means, said shaft means having a shaft with an outer supporting surface and supported from the operator'"'"'s station and an operator control slidably mounted on said shaft generally centrally thereof when in a neutral position, said operator control being operatively connected to control means to control a plurality of different truck functions, said operator control being actuatable forwardly from neutral position along said shaft means to control by said control means the operation of each of said different truck functions in a first mode and being actuatable rearwardly from neutral position along said shaft means to control by said control means the operation of each of said different truck functions in a second mode.
- 6. An industrial lift truck having at least ground traversing and lifting functions with an operator'"'"'s station, an operator'"'"'s control assembly comprising shaft means supported from the operator'"'"'s station and an operator control slidably mounted on said shaft means for actuation in either direction along said shaft means, said operator control being operatively connected to valve means for controlling a plurality of different hydraulic truck functins, said operative connection including pivotable lever means supported from the operator'"'"'s station connected to said valve means and rigid angled means connecting said operator control and said lever means such that actuation of said operator control in either direction along said shaft means actuates said angled connecting means to pivot in relation to the operator control which causes said lever means to pivot and actuate said valve means.
Specification