Machine element or mechanism – Control lever and linkage systems – Multiple controlled elements
Patent
1995-10-16
2000-09-05
Fenstermacher, David M.
Machine element or mechanism
Control lever and linkage systems
Multiple controlled elements
180333, 414664, G05G 1300
Patent
active
061126128
ABSTRACT:
A single lever hand control for multiple functions having two distinct axes of movement. In the case of a stand-up, battery powered lift truck having a mast, a carriage with forks raised and lowered on the mast, and the forks side shifted on the carriage, which also can be tilted from vertical, forward or back, the operator stands facing to the side with reference to the direction of travel of the truck. Movement of the control lever right to left from a neutral position relative to the direction the operator is facing controls the forward or reverse direction and the speed of the truck. The mast and carriage operations are controlled by the lever being pushed or pulled by the operator transversely to the direction of travel. The force required to displace the lever in one direction is less than that required in the other consistent with the large muscle groups employed to overcome the respective forces. Movement of the lever is also consistent with the direction of movement being imparted to the particular function being performed consistent with the ergonomics of a stand-up lift truck.
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Jones, Jr. William C.
Seksaria Arun K.
Clark Material Handling Company
Fenstermacher David M.
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