GB1457434A – – Google Patents
GB1457434A – – Google Patents
Info
Publication number
GB1457434A
GB1457434A
GB5696473A
GB5696473A
GB1457434A
GB 1457434 A
GB1457434 A
GB 1457434A
GB 5696473 A
GB5696473 A
GB 5696473A
GB 5696473 A
GB5696473 A
GB 5696473A
GB 1457434 A
GB1457434 A
GB 1457434A
Authority
GB
United Kingdom
Prior art keywords
trailer
pressure
valve
pipe
source
Prior art date
1972-12-08
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.)
Expired
Application number
GB5696473A
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.)
WABCO WESTINGHOUSE BRAKING SYS
Original Assignee
WABCO WESTINGHOUSE BRAKING SYS
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.)
1972-12-08
Filing date
1973-12-07
Publication date
1976-12-01
1973-12-07
Application filed by WABCO WESTINGHOUSE BRAKING SYS
filed
Critical
WABCO WESTINGHOUSE BRAKING SYS
1976-12-01
Publication of GB1457434A
publication
Critical
patent/GB1457434A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
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
B60T15/24—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 three fluid pressures
Abstract
1457434 Tractor-trailer braking WABCO WESTINGHOUSE 7 Dec 1973 [8 Dec 1972] 56964/73 Heading F2F A fluid pressure operable tractor braking system, for tractor braking and for supplying pressure signals for trailer braking, has a direct brake pipe 11 supplied by a source 56 via a relay valve 38 for providing a pressure signal for trailer brake actuation in response to a pressure signal at a first input of the valve, and an automatic pipe 10, normally supplied with fluid pressure and connected to a second valve input, providing a connection to a trailer emergency line 13 and affording the sole path for charging the source so that heavy demands on the source drop the pressure in the automatic line to cause trailer brake actuation by means of the emergency line. An air compressor 1 feeds front brake and rear brake reservoirs 66, 67 respectively via protection valves, controlled by a pedal 6; brake lines to the brakes also feed chambers 51, 64 (see Fig. 2) of the relay valve 38 whereby pressure increase in either chamber causes the source 56 e.g. a reservoir to be connected via a chamber 55 and a chamber 52 to an output 53 to feed the direct pipe 11. This pipe operates a trailer relay valve 15 to feed trailer brake lines from a reservoir 27 at a higher pressure than those of the tractor brake lines to avoid jack-knifing. The reservoirs 66, 67 provide the pressure for the automatic pipe 10 via one-way valves 69, 70, a common chamber 68, a braking valve 71, which has a predetermined difference between opening and closing pressures, and a regulator 72, and to supply the reservoir 56 and a chamber 55 of the valve 38 such that a decrease therein feeds the direct line 11. A pre-set relief valve 12 controls trailer emergency line pressure. As well as the provision against heavy demand on the source 56, if the pipe 11 ruptures, the source is exhausted to drop the automatic pressure, likewise caused if a rupture occurs in the pipe 10. The trailer emergency braking occurs by operation of the valve 15 when the input via the emergency line drops.
GB5696473A
1972-12-08
1973-12-07
Expired
GB1457434A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR7243766A
FR2209685B1
(en)
1972-12-08
1972-12-08
Publications (1)
Publication Number
Publication Date
GB1457434A
true
GB1457434A
(en)
1976-12-01
Family
ID=9108413
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5696473A
Expired
GB1457434A
(en)
1972-12-08
1973-12-07
Country Status (3)
Country
Link
FR
(1)
FR2209685B1
(en)
GB
(1)
GB1457434A
(en)
IT
(1)
IT999919B
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN112677947A
(en)
*
2021-03-11
2021-04-20
天津所托瑞安汽车科技有限公司
Proportional relay valve and pneumatic line control brake system
US11511716B2
(en)
2019-06-12
2022-11-29
Bendix Commercial Vehicle Systems Llc
EBS tractor control line to trailer system to improve transmission timing for an air brake system
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
IT1042832B
(en)
*
1974-09-27
1980-01-30
Graubremse Gmbh
BRAKING VALVE FOR TWO-DUCT SYSTEMS FOR BRAKE FLUID FOR VEHICLE PIMORKS
DE2810850A1
(en)
*
1978-03-13
1979-10-18
Wabco Fahrzeugbremsen Gmbh
TRAILER BRAKE VALVE
1972
1972-12-08
FR
FR7243766A
patent/FR2209685B1/fr
not_active
Expired
1973
1973-12-07
IT
IT7059973A
patent/IT999919B/en
active
1973-12-07
GB
GB5696473A
patent/GB1457434A/en
not_active
Expired
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US11511716B2
(en)
2019-06-12
2022-11-29
Bendix Commercial Vehicle Systems Llc
EBS tractor control line to trailer system to improve transmission timing for an air brake system
CN112677947A
(en)
*
2021-03-11
2021-04-20
天津所托瑞安汽车科技有限公司
Proportional relay valve and pneumatic line control brake system
CN112677947B
(en)
*
2021-03-11
2021-05-18
天津所托瑞安汽车科技有限公司
Proportional relay valve and pneumatic line control brake system
Also Published As
Publication number
Publication date
IT999919B
(en)
1976-03-10
FR2209685B1
(en)
1977-08-05
FR2209685A1
(en)
1974-07-05
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Legal Events
Date
Code
Title
Description
1977-04-14
PS
Patent sealed
1987-07-22
PCNP
Patent ceased through non-payment of renewal fee
