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US 2012/0239259 A1Published application
Dynamic Stability Control Systems and Methods for Industrial Lift Trucks
AssigneeThe Raymond Corporation
InventorsPaul P. McCabe, John B. Kirk, Bryce Gregory, Michael G. Field
Life of this patent
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Abstract
A lift truck includes systems and methods for improved stability control. Stability control features reduce or eliminate motion of the truck in one or more of the X-axis, Y-axis, and Z-axis. Some embodiments may include, alone or in combination with the stability control, vibration control to further stabilize the motion of the truck.
Claims28
A system for stabilizing a lift truck, the system comprising:
- at least one caster to provide lift truck stability;
- a sensor to provide a value of motion of the lift truck in at least one of an X-axis and a Y-axis;
- a control system, the control system to determine which direction the lift truck is moving in the at least one of the X-axis and the Y-axis by comparing the value of motion to a stationary value of motion;
- the control system also compares the value of motion to a threshold value of motion;
- and
- an actuator to lock movement of the caster on a side of the lift truck based on the direction that the control system determined the lift truck to be moving.
3 more elements
A method for stabilizing a lift truck having at least one caster, the method comprising:
- measuring a value of motion of the lift truck in at least one of an X-axis and a Y-axis;
- determining which direction the lift truck is moving by comparing the measured value of motion to a stationary value of motion;
- comparing the measured value of motion to a threshold value of motion;
- and
- locking movement of the caster on a side of the lift truck that is determined to be moving.
2 more elements
A lift truck having stability control, the lift truck comprising:
- at least one caster to provide lift truck stability;
- a vertical support for mounting electrical components, the vertical support including two or more cylinders that function as a mass-damper system;
- a sensor to provide a value of motion of the lift truck in at least one of an X-axis and a Y-axis and a Z-axis;
- a control system, the control system to control the mass-damper and to determine which direction the lift truck is moving in the at least one of the X-axis and the Y-axis and the Z-axis by comparing the value of motion to a stationary value of motion;
- the control system also to compare the value of motion to a threshold value of motion;
- and
- an actuator to lock movement of the caster on a side of the lift truck based on the direction that the control system determined the lift truck to be moving.
4 more elements
Dependencies are inferred from the claim text.