Parking brake reset mechanism for railway vehicles
AssigneeWabtec Holding Corp.
InventorsJames Thomas Dewberry, Robert Norman Scharpf
Life of this patent
Estimating the term…
Abstract
A parking brake reset system for a railway vehicle, such as a transit vehicle, includes a brake operating unit fluidly connected to a main air reservoir and controlling air flow to a brake cylinder of the railway vehicle, a brake pipe, a parking brake, and a control valve in line between the brake pipe and the parking brake to establish fluid communication between the brake pipe and the parking brake. The control valve is in line between the brake operating unit and the parking brake, whereby the control valve controls air flow to the parking brake from the main air reservoir and the brake pipe. The control valve may be a double check valve or a 3-way cutout valve, as examples.
Claims18
A parking brake reset system for a railway vehicle, comprising:
- a brake pipe;
- a parking brake;
- and
- a control valve in line between the brake pipe and the parking brake to establish fluid communication between the brake pipe and the parking brake,
- wherein the brake pipe is adapted for connection to a brake pipe of another railway vehicle so the brake pipe of the another railway vehicle can re-pressurize the parking brake of the railway vehicle, and
- wherein pressurized fluid from the another railway vehicle flows directly from the brake pipe of the another railway vehicle to the parking brake of the railway vehicle through the control valve.
A parking brake reset system for a railway vehicle, comprising:
- a brake operating unit fluidly connected to a main air reservoir and controlling air flow to a brake cylinder of the railway vehicle;
- a brake pipe;
- a parking brake;
- and
- a control valve in line between the brake pipe and the parking brake;
- and;
- wherein the control valve is in line between the brake operating unit and the parking brake to establish fluid communication between the brake pipe and the parking brake, whereby the control valve controls air flow to the parking brake from the main air reservoir and the brake pipe,
- wherein the brake pipe is adapted for connection to a brake pipe of another railway vehicle so the brake pipe of the another railway vehicle can re-pressurize the parking brake of the railway vehicle, and
- wherein pressurized fluid from the another railway vehicle flows directly from the brake pipe of the another railway vehicle to the parking brake of the railway vehicle through the control valve.
Dependencies are inferred from the claim text.