FR2270131A2 - Vehicle air brake safety valve - is arranged so that trailer braking takes place when normal pressure drops or if trailer breaks away - Google Patents

Vehicle air brake safety valve - is arranged so that trailer braking takes place when normal pressure drops or if trailer breaks away

Info

Publication number
FR2270131A2
FR2270131A2 FR7407432A FR7407432A FR2270131A2 FR 2270131 A2 FR2270131 A2 FR 2270131A2 FR 7407432 A FR7407432 A FR 7407432A FR 7407432 A FR7407432 A FR 7407432A FR 2270131 A2 FR2270131 A2 FR 2270131A2
Authority
FR
France
Prior art keywords
trailer
takes place
normal pressure
safety valve
vehicle air
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
FR7407432A
Other languages
French (fr)
Other versions
FR2270131B2 (en
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.)
Individual
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
Priority claimed from FR7342678A external-priority patent/FR2252937A1/en
Application filed by Individual filed Critical Individual
Priority to FR7407432A priority Critical patent/FR2270131A2/en
Priority to IT4821075A priority patent/IT1029761B/en
Priority to BR7501235A priority patent/BR7501235A/en
Publication of FR2270131A2 publication Critical patent/FR2270131A2/en
Application granted granted Critical
Publication of FR2270131B2 publication Critical patent/FR2270131B2/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/26—Compressed-air systems
    • B60T13/268—Compressed-air systems using accumulators or reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
    • B60T15/20—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere controlled by two fluid pressures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The system consists of front tractor brakes (1), rear ones (2) and trailer brakes (3). The front brake circuit has a control valve (4) worked by a pedal (5) and is joined to a reservoir (6). The rear brakes (2) also has a control valve (9), joined to a reservoir (11). The trailer system consists of a control valve (14). This has two entries, one joined by a pipe (15) to the front brake system (1). The other goes to the rear brakes (3). There is also a third entry connected to a reservoir (17) and another joined by a flexible pipe (19) to a relay valve (18) on the trailer. If air pressure falls rapidly the valve (14) continues to control the relay valve (18). Should the trailer break away, its braking system still operates.
FR7407432A 1973-11-30 1974-03-05 Vehicle air brake safety valve - is arranged so that trailer braking takes place when normal pressure drops or if trailer breaks away Granted FR2270131A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7407432A FR2270131A2 (en) 1973-11-30 1974-03-05 Vehicle air brake safety valve - is arranged so that trailer braking takes place when normal pressure drops or if trailer breaks away
IT4821075A IT1029761B (en) 1974-03-05 1975-02-17 Vehicle air brake safety valve - is arranged so that trailer braking takes place when normal pressure drops or if trailer breaks away
BR7501235A BR7501235A (en) 1974-03-05 1975-03-03 SAFETY VALVE IMPROVEMENT FOR COMPRESSED AIR BRAKING DEVICE FOR MOTOR VEHICLES AND BRAKING DEVICE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7342678A FR2252937A1 (en) 1973-11-30 1973-11-30 Automobile air brake safety valve - is for automatic application of trailer brakes if pressure fails on lorry brakes
FR7407432A FR2270131A2 (en) 1973-11-30 1974-03-05 Vehicle air brake safety valve - is arranged so that trailer braking takes place when normal pressure drops or if trailer breaks away

Publications (2)

Publication Number Publication Date
FR2270131A2 true FR2270131A2 (en) 1975-12-05
FR2270131B2 FR2270131B2 (en) 1977-04-08

Family

ID=26218057

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7407432A Granted FR2270131A2 (en) 1973-11-30 1974-03-05 Vehicle air brake safety valve - is arranged so that trailer braking takes place when normal pressure drops or if trailer breaks away

Country Status (1)

Country Link
FR (1) FR2270131A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2297157A1 (en) * 1975-01-13 1976-08-06 Graubremse Gmbh Dual circuit brake system - has trailer supply line with isolating valve containing shut off forming pressure chamber
EP0369222A2 (en) * 1988-11-18 1990-05-23 Knorr-Bremse Ag Monitoring valve for control valves, especially for trailer control valves in brake systems of utility vehicles
WO2000017026A1 (en) * 1998-09-21 2000-03-30 Neil Edward Walker Safety device for and system to improve safety of braking systems of articulated vehicles
WO2000035729A1 (en) * 1998-12-11 2000-06-22 Wabco Automotive Uk Limited Valve for a braking system of a vehicle and trailer combination

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2297157A1 (en) * 1975-01-13 1976-08-06 Graubremse Gmbh Dual circuit brake system - has trailer supply line with isolating valve containing shut off forming pressure chamber
EP0369222A2 (en) * 1988-11-18 1990-05-23 Knorr-Bremse Ag Monitoring valve for control valves, especially for trailer control valves in brake systems of utility vehicles
EP0369222A3 (en) * 1988-11-18 1991-06-19 Knorr-Bremse Ag Monitoring valve for control valves, especially for trailer control valves in brake systems of utility vehicles
WO2000017026A1 (en) * 1998-09-21 2000-03-30 Neil Edward Walker Safety device for and system to improve safety of braking systems of articulated vehicles
WO2000035729A1 (en) * 1998-12-11 2000-06-22 Wabco Automotive Uk Limited Valve for a braking system of a vehicle and trailer combination

Also Published As

Publication number Publication date
FR2270131B2 (en) 1977-04-08

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