GB752058A - Improvements relating to foot valves for fluid pressure braking systems - Google Patents

Improvements relating to foot valves for fluid pressure braking systems

Info

Publication number
GB752058A
GB752058A GB32059/54A GB3205954A GB752058A GB 752058 A GB752058 A GB 752058A GB 32059/54 A GB32059/54 A GB 32059/54A GB 3205954 A GB3205954 A GB 3205954A GB 752058 A GB752058 A GB 752058A
Authority
GB
United Kingdom
Prior art keywords
tractor
trailer
chamber
pressure
spring
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
GB32059/54A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co 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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Publication of GB752058A publication Critical patent/GB752058A/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
    • B60T15/04—Driver's valves
    • B60T15/043—Driver's valves controlling service pressure brakes
    • B60T15/045—Driver's valves controlling service pressure brakes in multiple circuit systems, e.g. dual circuit systems
    • B60T15/046—Driver's valves controlling service pressure brakes in multiple circuit systems, e.g. dual circuit systems with valves mounted in tandem

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

752,058. Fluid-pressure brakes. WESTING- HOUSE BRAKE & SIGNAL CO., Ltd. Nov. 5, 1954 [Nov. 6, 1953], No. 32059/54. Addition to 751,578. Class 103 (1). In a foot valve as claimed in Specification 751,578 the auxiliary body is spring-biased towards its unoperated position. In the embodiment shown applied to a tractor-trailer braking system the construction is similar to that illustrated in Specification 751,578 except that the auxiliary body 2 is spring- biased towards its unoperated position by an adjustable spring and pivoted lever arrangement 31-36 such that there is a delay between the operation of the trailer brakes and the operation of the tractor brakes to prevent " jack-knifing." Compressed air is transmitted to the trailer brakes via port 7, chamber 21, valve controlled passage 19, into chamber 14 and outlet port 8, and to the tractor brakes via port 30, chamber 29, valve controlled passage 24, into chamber 27 via conduit 28. The pressure admitted to the cylinder of the tractor will be lower than the pressure admitted to the trailer by an amount depending on the tension of the spring 35 which is adjustable so that it is possible to vary the decrease in pressure admitted to the tractor as a function of that admitted to the trailer. A further modification lies in the fact that the maximum pressure set up in the trailer brake cylinders may be adjusted by means of the nut 5 screwed on stem 4 of the first piston 11 such that if the nut is moved down the stem 4 to a point where the nut bears on the head 37 of the auxiliary body 2 before control of the braking circuit of the tractor is initiated by the means already described, further pressure exerted on stem 4 results in the depression of the body 2 thus initiating control of the tractor braking, the air pressure in the chamber 14 and the trailer conduit remaining constant. An alternative arrangement of the position of the spring 35 is described in the Specification.
GB32059/54A 1953-11-06 1954-11-05 Improvements relating to foot valves for fluid pressure braking systems Expired GB752058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR752058X 1953-11-06

Publications (1)

Publication Number Publication Date
GB752058A true GB752058A (en) 1956-07-04

Family

ID=9157320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32059/54A Expired GB752058A (en) 1953-11-06 1954-11-05 Improvements relating to foot valves for fluid pressure braking systems

Country Status (1)

Country Link
GB (1) GB752058A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053578A (en) * 1958-07-16 1962-09-11 Magneti Marelli Spa Duplex distributors for pneumatic braking plants, particularly for vehicles
DE1202660B (en) * 1959-05-09 1965-10-07 Moguert Gepjarmue Kuelkeresked Multi-circuit brake valve for pressure medium brake systems in motor vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053578A (en) * 1958-07-16 1962-09-11 Magneti Marelli Spa Duplex distributors for pneumatic braking plants, particularly for vehicles
DE1202660B (en) * 1959-05-09 1965-10-07 Moguert Gepjarmue Kuelkeresked Multi-circuit brake valve for pressure medium brake systems in motor vehicles

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