CA2558795A1 - Apparatus and method for pneumatically controlled graduated brake pressure release for freight train brake system - Google Patents

Apparatus and method for pneumatically controlled graduated brake pressure release for freight train brake system

Info

Publication number
CA2558795A1
CA2558795A1 CA002558795A CA2558795A CA2558795A1 CA 2558795 A1 CA2558795 A1 CA 2558795A1 CA 002558795 A CA002558795 A CA 002558795A CA 2558795 A CA2558795 A CA 2558795A CA 2558795 A1 CA2558795 A1 CA 2558795A1
Authority
CA
Canada
Prior art keywords
valve
brake
pressure
graduated
pneumatic control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002558795A
Other languages
French (fr)
Other versions
CA2558795C (en
Inventor
James E. Hart
Thomas Engle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westinghouse Air Brake Technologies Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority claimed from CA002351915A external-priority patent/CA2351915C/en
Publication of CA2558795A1 publication Critical patent/CA2558795A1/en
Application granted granted Critical
Publication of CA2558795C publication Critical patent/CA2558795C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Braking Systems And Boosters (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

A graduated release valve for freight brake control is provided for a railcar having a pneumatic control valve, emergency and auxiliary reservoirs each normally charged with pressurized fluid from a brake pipe and a fluid pressure activated brake cylinder device for applying the brakes on the railcar. A selectively operable graduated release valve can include a metering valve and a changeover valve which selectively interposes the metering valve to exhaust brake cylinder pressure in a graduated manner responsive to brake pipe pressure. Alternatively, the changeover valve can isolate the metering valve and direct the pneumatic control valve to exhaust brake cylinder pressure in a conventional manner. The changeover valve can be operated responsive to the pressure in an air pipe supplied with pressurized fluid from a remote source. An auxiliary reservoir charging check valve interposed between the auxiliary reservoir and the brake pipe prevents the pneumatic control valve from going to release by connecting the brake pipe to the auxiliary reservoir.
CA002558795A 2000-06-28 2001-06-28 Apparatus and method for pneumatically controlled graduated brake pressure release for freight train brake system Expired - Fee Related CA2558795C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US21451100P 2000-06-28 2000-06-28
US60/214,511 2000-06-28
CA002351915A CA2351915C (en) 2000-06-28 2001-06-28 Apparatus and method for pneumatically controlled graduated brake pressure release for freight train brake system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002351915A Division CA2351915C (en) 2000-06-28 2001-06-28 Apparatus and method for pneumatically controlled graduated brake pressure release for freight train brake system

Publications (2)

Publication Number Publication Date
CA2558795A1 true CA2558795A1 (en) 2001-12-28
CA2558795C CA2558795C (en) 2007-04-17

Family

ID=37114272

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002558723A Expired - Fee Related CA2558723C (en) 2000-06-28 2001-06-28 Apparatus and method for pneumatically controlled graduated brake pressure release for freight train brake system
CA002558795A Expired - Fee Related CA2558795C (en) 2000-06-28 2001-06-28 Apparatus and method for pneumatically controlled graduated brake pressure release for freight train brake system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA002558723A Expired - Fee Related CA2558723C (en) 2000-06-28 2001-06-28 Apparatus and method for pneumatically controlled graduated brake pressure release for freight train brake system

Country Status (1)

Country Link
CA (2) CA2558723C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114572269A (en) * 2020-11-30 2022-06-03 中车山东机车车辆有限公司 Brake control system of vehicle, vehicle and train

Also Published As

Publication number Publication date
CA2558723C (en) 2008-02-19
CA2558723A1 (en) 2001-12-28
CA2558795C (en) 2007-04-17

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20200831