Multi function single lever control for lift trucks
October 16, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3011739 Single lever steering control for hydraulic drive vehicles Lever operated control apparatus Joystick Operator control system Three function control system Three-function control mechanism employing a single control lever Single lever for controlling multiple functions Anti-rollback mechanism for a loader mechanism of an off-highway implement Patent #: 5501570 InventorsAssigneeApplicationNo. 543734 filed on 10/16/1995US Classes:74/471XY, Control moves in two planes180/333, Multiple vehicle functions controllable by single device414/664Carrier comprises spaced, elongated, horizontally coplanar, load-supporting members, at least one being movableExaminersPrimary: Fenstermacher, DavidAttorney, Agent or FirmInternational ClassG05G 013/00AbstractA 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.Field of SearchControl moves in two planesMultiple vehicle functions controllable by single device Having means to transmit feedback signal from manipulator means to hand, finger, or arm Comprising means enabling additional movement of carrier or portion thereof relative to its support On portable (e.g., vehicle-mounted, etc.) elevator Carrier comprises spaced, elongated, horizontally coplanar, load-supporting members, at least one being movable Controller Rudder bar and pedal Electrical pickup Three-way steering, single control | |
