GB1453715A - Relay valves - Google Patents

Relay valves

Info

Publication number
GB1453715A
GB1453715A GB3295873A GB3295873A GB1453715A GB 1453715 A GB1453715 A GB 1453715A GB 3295873 A GB3295873 A GB 3295873A GB 3295873 A GB3295873 A GB 3295873A GB 1453715 A GB1453715 A GB 1453715A
Authority
GB
United Kingdom
Prior art keywords
piston
pressure
port
seat
valve
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.)
Expired
Application number
GB3295873A
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.)
Honeywell UK Ltd
Original Assignee
Bendix Westinghouse Ltd
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 Bendix Westinghouse Ltd filed Critical Bendix Westinghouse Ltd
Priority to GB3295873A priority Critical patent/GB1453715A/en
Publication of GB1453715A publication Critical patent/GB1453715A/en
Expired 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
    • 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
    • B60T15/34—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 alternatively by two or three fluid pressures

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

1453715 Valves for fluid pressure braking systems BENDIX WESTINGHOUSE Ltd 10 July 1974 [11 July 1973] 32958/73 Headings F2V and F2F A relay valve, e.g. for controlling pressure to a trailer braking system, comprises a housing 1 with a cylindrical bore 2 in which pistons 3, 4, 12 are slidable pistons in response to control pressure supplied to at least one of input ports 13, 14, 15. Piston 4 has an extension 16 carrying a "self-lapping" valve closure member 17 which is biased by spring 18 away from a seat 19. The latter is carried by an exhaust tube 22 which also forms an inlet valve closure member biased against inlet seat 21 by spring 20 to prevent reservoir pressure applied to port 23 from communicating with a work port (not shown) disposed below piston 4 and connected to the trailer brakes. Thus when a control pressure is applied to ports 13, 15 by a foot operated valve or to port 14 by a secondary brake system, piston 4 is forced downwardly so that valve member 17 abuts seat 19 to close the exhaust passage and simultaneously unseat tube 22 to communicate reservoir pressure at port 23 to the trailer brakes via the work port. If the control pressure is reduced, piston 4 rises causing valve member 17 to lift off seat 19 to vent the brake cylinders to atmosphere until a lower pressure is present beneath piston 4, whereupon member 17 again closes the exhaust passage. The pistons 3, 4, 12 move individually or as a stack depending upon which control ports 13, 14, 15 are in use, and mutually guide one another by interfitting skirts 6, 8 provided with nylon packing 11 and seal rings 7, 10.
GB3295873A 1973-07-11 1973-07-11 Relay valves Expired GB1453715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3295873A GB1453715A (en) 1973-07-11 1973-07-11 Relay valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3295873A GB1453715A (en) 1973-07-11 1973-07-11 Relay valves

Publications (1)

Publication Number Publication Date
GB1453715A true GB1453715A (en) 1976-10-27

Family

ID=10346551

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3295873A Expired GB1453715A (en) 1973-07-11 1973-07-11 Relay valves

Country Status (1)

Country Link
GB (1) GB1453715A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1285836A2 (en) * 2001-08-13 2003-02-26 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Pneumatically operated functional unit for compressed-air brakes
CN113175544A (en) * 2021-04-19 2021-07-27 瑞立集团瑞安汽车零部件有限公司 Two-position three-way valve and integrated EPB air treatment device based on two-position three-way valve
WO2024077699A1 (en) * 2022-10-10 2024-04-18 浙江万安科技股份有限公司 Parking relay valve and parking braking system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1285836A2 (en) * 2001-08-13 2003-02-26 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Pneumatically operated functional unit for compressed-air brakes
EP1285836A3 (en) * 2001-08-13 2003-12-10 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Pneumatically operated functional unit for compressed-air brakes
US6846048B2 (en) 2001-08-13 2005-01-25 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Pneumatic operating unit for compressed-air brakes
CN113175544A (en) * 2021-04-19 2021-07-27 瑞立集团瑞安汽车零部件有限公司 Two-position three-way valve and integrated EPB air treatment device based on two-position three-way valve
WO2024077699A1 (en) * 2022-10-10 2024-04-18 浙江万安科技股份有限公司 Parking relay valve and parking braking system

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee