Apparatus for controlling a load lifting element of a vehicle in response to the wearing of a motor brush
AssigneeCaterpillar Industrial Inc.
InventorsWilliam Pickering, Bruce A. Nielsen, Arthur Wild
Life of this patent
Estimating the term…
Abstract
An apparatus for controlling a load lifting implement of a work vehicle in response to the condition of a motor brush is provided. The vehicle has a frame and the load lifting implement is connected to the frame and elevationally moveable relative to the frame between first and second directions. A brush wear indicator senses the wear of the motor brush and produces a warning signal in response to a predetermined amount of wear of the motor brush. A control system receives the warning signal and responsively controllably inhibits the elevational movement of the load lifting implement in at least one of the first and second directions.
Claims9
An apparatus for controlling a load lifting implement of a work vehicle in response to the condition of a motor brush, said vehicle having a frame and said load lifting implement being connected to the frame and elevationally moveable relative to the frame in first and second directions, comprising:
- a vehicle drive motor being adapted to propel said vehicle;
- a single acting fluid operated jack being connected to said load lifting implement and extensibly moveable in response to receiving pressurized fluid flow to elevationally move said load lifting element;
- a pump being connected to said single acting fluid operated jack and adapted to deliver pressurized fluid to said jack in response to rotation thereof;
- a pump motor being adapted to rotate said pump in response to being energized;
- indicator means for sensing the wear of said motor brush and producing a warning signal in response to a predetermined amount of wear of said motor brush;
- a logic means for receiving said warning signal and responsively producing a control signal, said pump motor being adapted to receive said control signal and substantially deenergize in response to receiving said control signal causing said load lifting implement to be moveable only in said second direction;
- and
- wherein said vehicle drive motor is operational.
Dependencies are inferred from the claim text.