Vertical ride quality system for a rail vehicle
AssigneeHarsco Technologies LLC
InventorKevin Hansen
Life of this patent
Estimating the term…
Abstract
A rail maintenance vehicle includes a frame, a workhead, an actuator, a pilot valve, and a throttling valve. The frame includes wheels that travel along rails. The actuator extends and retracts the workhead with respect to the frame. The pilot valve receives a fluid and controls the flow of the fluid to at least one output. The throttling valve adjusts a pressure of the fluid at an output relative to a pressure of the fluid at an input. The pilot valve and the throttle valve are coupled such that the fluid travels through the pilot valve and the throttling valve to cause the workhead to be extended or retracted.
Claims20
A rail maintenance vehicle, comprising:
- a frame having wheels that travel along rails;
- a workhead;
- an actuator that extends and retracts the workhead with respect to the frame;
- a pilot valve that receives a fluid and controls the flow of the fluid to at least one output;
- a throttling valve that adjusts a pressure of the fluid at an output relative to a pressure of the fluid at an input, wherein
- the pilot valve and the throttle valve are coupled such that the fluid travels through the pilot valve and the throttling valve to cause the workhead to be extended or retracted.
A method of operating a maintenance vehicle, comprising:
- supplying fluid to a pilot valve;
- supplying the fluid to a throttling valve that adjusts a pressure of the fluid at an output relative to a pressure of the fluid at an input;
- and
- controlling an actuator that extends and retracts a workhead relative to a frame of the vehicle using the fluid exiting the throttling valve.
Dependencies are inferred from the claim text.