GB1388984A – Trailer vehicle brake control valves
– Google Patents
GB1388984A – Trailer vehicle brake control valves
– Google Patents
Trailer vehicle brake control valves
Info
Publication number
GB1388984A
GB1388984A
GB4417573A
GB4417573A
GB1388984A
GB 1388984 A
GB1388984 A
GB 1388984A
GB 4417573 A
GB4417573 A
GB 4417573A
GB 4417573 A
GB4417573 A
GB 4417573A
GB 1388984 A
GB1388984 A
GB 1388984A
Authority
GB
United Kingdom
Prior art keywords
valve
brake
pressure
trailer brake
pistons
Prior art date
1972-09-21
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
GB4417573A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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.)
1972-09-21
Filing date
1973-09-20
Publication date
1975-04-03
1973-09-20
Application filed by Robert Bosch GmbH
filed
Critical
Robert Bosch GmbH
1975-04-03
Publication of GB1388984A
publication
Critical
patent/GB1388984A/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
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
1388984 Fluid pressure brakes ROBERT BOSCH GmbH 20 Sept 1973 [21 Sept 1972] 44175/73 Heading F2F A trailer brake control valve for two-circuit compressed air brake systems has two pistons 2, 3 axially displaceable in the same direction in a valve housing 1 which pistons in operation can be acted upon by pressure of medium in the trailer brake line and by brake pressure medium in one of the two brake circuits and which carry a valve seat 25 which co-operates with a double valve closure member 28 to form an outlet valve, an inlet seat 26 formed in the valve housing also co-operating with the closure member to form an inlet valve, the inlet and outlet valves being used for pressurizing and venting the trailer brake line and one of the pistons 2 being bipartite with a larger portion 4 and a smaller portion 5 acting in opposition to the first portion and retained, in operation, inoperative against a housing stop by a prestressed spring 10 during a first rapid increase of brake pressure medium in the trailer brake line and after pressure acting upon the second portion has exceeded a predetermined level and overcome the spring is effective against the force of the first piston portion so that there is then effective only a differential surface which is approximately as large as a reaction surface of a retroactive piston 14 which in operation is subjected to the pressure of brake fluid in the trailer brake line and which renders the valve control effective in stages. A lost motion connection 12 permits limited axial movement between piston portions 4, 5.
GB4417573A
1972-09-21
1973-09-20
Trailer vehicle brake control valves
Expired
GB1388984A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE2246236A
DE2246236A1
(en)
1972-09-21
1972-09-21
TRAILER CONTROL VALVE
Publications (1)
Publication Number
Publication Date
GB1388984A
true
GB1388984A
(en)
1975-04-03
Family
ID=5856900
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4417573A
Expired
GB1388984A
(en)
1972-09-21
1973-09-20
Trailer vehicle brake control valves
Country Status (7)
Country
Link
US
(1)
US3861761A
(en)
JP
(1)
JPS4970331A
(en)
AT
(1)
AT335865B
(en)
BR
(1)
BR7307324D0
(en)
CH
(1)
CH557249A
(en)
DE
(1)
DE2246236A1
(en)
GB
(1)
GB1388984A
(en)
Families Citing this family (9)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE3205228C2
(en)
*
1982-02-13
1999-04-01
Bosch Gmbh Robert
Multi-circuit pressure medium brake system
GB2119464B
(en)
*
1982-03-17
1985-03-20
Lucas Ind Plc
Improvements in dual brake valves
DE3309238A1
(en)
*
1983-03-15
1984-09-20
Knorr-Bremse GmbH, 8000 München
TRAILER CONTROL VALVE
DE3439086A1
(en)
*
1984-10-25
1986-05-15
Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover
RELAY VALVE DEVICE
DE3918226A1
(en)
*
1989-06-03
1990-12-06
Graubremse Gmbh
Trailer brake control valve – has trailer braking suited to that of towing vehicle by spring-controlled adjustment piston with limited movement
DE19639464A1
(en)
*
1996-09-26
1998-04-02
Bosch Gmbh Robert
Two-circuit hydraulically controllable trailer control valve
GB9701795D0
(en)
*
1997-01-29
1997-03-19
Lucas Ind Plc
Improvements in pneumatically-operated braking systems for vehicles
WO2013184666A1
(en)
*
2012-06-04
2013-12-12
Firestone Industrial Products Company, Llc
Valve assembly for rail vehicles and pneumatic system including same
EP4045368A1
(en)
*
2019-10-14
2022-08-24
Wabco India Limited
Trailer control valve with a leakage protection function for a brake system of a vehicle
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3240534A
(en)
*
1963-01-09
1966-03-15
Kelsey Hayes Co
Tractor trailer brake system
DE1505505A1
(en)
*
1965-12-17
1969-10-30
Berg Europa Gmbh
Compressed air brake system with magnetic permanent brake valve
DE1980549U
(en)
*
1967-12-22
1968-03-07
Westinghouse Bremsen Apparate
RELAY VALVE FOR BRAKE SYSTEM.
1972
1972-09-21
DE
DE2246236A
patent/DE2246236A1/en
active
Pending
1973
1973-08-20
CH
CH1193573A
patent/CH557249A/en
not_active
IP Right Cessation
1973-09-13
AT
AT794873A
patent/AT335865B/en
not_active
IP Right Cessation
1973-09-18
US
US398545A
patent/US3861761A/en
not_active
Expired – Lifetime
1973-09-20
JP
JP48105534A
patent/JPS4970331A/ja
active
Pending
1973-09-20
BR
BR7324/73A
patent/BR7307324D0/en
unknown
1973-09-20
GB
GB4417573A
patent/GB1388984A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE2246236A1
(en)
1974-03-28
JPS4970331A
(en)
1974-07-08
BR7307324D0
(en)
1974-08-15
ATA794873A
(en)
1976-07-15
CH557249A
(en)
1974-12-31
AT335865B
(en)
1977-04-12
US3861761A
(en)
1975-01-21
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(en)
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Electromagnetic valve arrangement
Legal Events
Date
Code
Title
Description
1975-08-13
PS
Patent sealed [section 19, patents act 1949]
