Parking brake reset mechanism for railway vehicles

Patent metadata

Field	Value
Publication number	US-9751513-B2
Application number	US-201313803056-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 14, 2013
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

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.

First claim

The invention claimed is:

1. 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.

2. The parking brake reset system as claimed in claim 1 , further comprising a pressure measurement port fluidly connected in line between the brake pipe and the control valve.

3. The parking brake reset system as claimed in claim 2 , further comprising a quick disconnect unit positioned in line with the pressure measurement port.

4. The parking brake reset system as claimed in claim 3 , wherein the quick disconnect unit is adapted for connection to a quick disconnect unit of another railway vehicle.

5. The parking brake reset system as claimed in claim 2 , further comprising a pressure gauge connected to the pressure measurement port.

6. The parking brake reset system as claimed in claim 1 , wherein the brake pipe is adapted for connection to a brake pipe of another railway vehicle via a tappet valve.

7. The parking brake reset system as claimed in claim 6 , further comprising a brake pipe isolation valve positioned in line with the tappet valve.

8. The parking brake reset system as claimed in claim 1 , wherein the control valve comprises a double check valve.

9. The parking brake reset system as claimed in claim 1 , wherein the control valve comprises a 3-way cutout valve.

10. 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.

11. The parking brake reset system as claimed in claim 10 , further comprising a pressure measurement port fluidly connected in line between the brake pipe and the control valve.

12. The parking brake reset system as claimed in claim 11 , further comprising a quick disconnect unit positioned in line with the pressure measurement port.

13. The parking brake reset system as claimed in claim 12 , wherein the quick disconnect unit is adapted for connection to a quick disconnect unit of another railway vehicle.

14. The parking brake reset system as claimed in claim 11 , further comprising a pressure gauge connected to the pressure measurement port.

15. The parking brake reset system as claimed in claim 10 , wherein the brake pipe is adapted for connection to a brake pipe of another railway vehicle via a tappet valve.

16. The parking brake reset system as claimed in claim 15 , further comprising a brake pipe isolation valve positioned in line with the tappet valve.

17. The parking brake reset system as claimed in claim 10 , wherein the control valve comprises a double check valve.

18. The parking brake reset system as claimed in claim 10 , wherein the control valve comprises a 3-way cutout valve.

Assignees

• Wabtec Holding Corp

Inventors

• Dewberry James Thomas
• Scharpf Robert Norman

Classifications

• B60T17/228

  for railway vehicles · CPC title

• B60T15/60 Primary

  for releasing or applying brakes when vehicles of a vehicle train are uncoupled · CPC title

• B60T13/665

  the systems being specially adapted for transferring two or more command signals, e.g. railway systems (B60T13/662 takes precedence) · CPC title

• B60T13/266

  Systems with both direct and indirect application, e.g. in railway vehicles · CPC title

• B61H13/005

  Spring actuation · CPC title