GB704436A - Improvements in or relating to fluid pressure braking systems - Google Patents

Improvements in or relating to fluid pressure braking systems

Info

Publication number
GB704436A
GB704436A GB577752A GB577752A GB704436A GB 704436 A GB704436 A GB 704436A GB 577752 A GB577752 A GB 577752A GB 577752 A GB577752 A GB 577752A GB 704436 A GB704436 A GB 704436A
Authority
GB
United Kingdom
Prior art keywords
brakes
valve
pressure
trailer
tractor
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
GB577752A
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.)
Bendix Aviation Corp
Original Assignee
Bendix Aviation Corp
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 US214747A external-priority patent/US2694468A/en
Application filed by Bendix Aviation Corp filed Critical Bendix Aviation Corp
Publication of GB704436A publication Critical patent/GB704436A/en
Priority claimed from US65959857 external-priority patent/US2910051A/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
    • 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
    • B60T13/58—Combined or convertible systems
    • B60T13/581—Combined or convertible systems both hydraulic and pneumatic
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
  • Regulating Braking Force (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

704,436. Fluid pressure brakes. BENDIX AVIATION CORPORATION. March 5, 1952 [March 9, 1951], No. 5777/52. Class 103(1) In a vacuum servo operated hydraulic brake system for tractor-trailer vehicle combinations as shown in Fig. 1, the trailer brakes 16 are arranged to be applied on the first movement of the pedal 60 by the closing of a switch 52 which energizes a solenoid operated valve 36, thus allowing the pressure operative in a regulator valve 32 to be transmitted by conduits 38, 40 and 44 to relay valve 21 of known type which admits atmospheric air to the trailer brake cylinder 18 which is of the vacuum suspended type. The trailer brakes are thus applied in advance of the tractor brakes which are of known hydraulic type, the pressure applied by a master cylinder 54 being boosted by a vacuum servo unit 48. The regulator valve 32, shown in detail in Fig. 3, which is the same as that described in Specification 550,686 comprises a self-lapping valve, the valve elements 132, 138 of which are adjustable by a hand-set member 146 controlling the position of rod 130 to produce a definite pressure in chamber 108, the pressure being chosen to suit particular road conditions so that the brakes may be applied without skidding. This pressure then becomes the maximum operative to control the brakes at the relay valve 21. In the arrangements shown, apart from the initial advance application of the trailer brakes, both tractor and trailer braking pressures are subsequently controlled by the valve 58, there being a two-way shuttle valve, shown in Fig. 6, fitted at 42. In another arrangement described an advance pressure increase is maintained at the trailer brakes right up to the maximum pressure obtainable. The system described above clearly has advantages over a system such as that described in Specification 629,225 in that there is no lag in the normal application of the tractor brakes, although there is still an advance given to the trailer brakes.
GB577752A 1951-03-09 1952-03-05 Improvements in or relating to fluid pressure braking systems Expired GB704436A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US214747A US2694468A (en) 1951-03-09 1951-03-09 Tractor-trailer brake system
US65959857 US2910051A (en) 1957-05-16 1957-05-16 Pneumatic brake valve to provide feel

Publications (1)

Publication Number Publication Date
GB704436A true GB704436A (en) 1954-02-24

Family

ID=26909313

Family Applications (3)

Application Number Title Priority Date Filing Date
GB577752A Expired GB704436A (en) 1951-03-09 1952-03-05 Improvements in or relating to fluid pressure braking systems
GB2455953A Expired GB726760A (en) 1951-03-09 1953-09-04 Tractor-trailer fluid pressure brake system
GB1568958A Expired GB839676A (en) 1951-03-09 1958-05-15 Improvements in or relating to fluid control valves

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB2455953A Expired GB726760A (en) 1951-03-09 1953-09-04 Tractor-trailer fluid pressure brake system
GB1568958A Expired GB839676A (en) 1951-03-09 1958-05-15 Improvements in or relating to fluid control valves

Country Status (2)

Country Link
FR (2) FR1057025A (en)
GB (3) GB704436A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH438976A (en) * 1960-04-30 1967-06-30 Girling Ltd Valve
US3390919A (en) * 1965-07-12 1968-07-02 Boyce Albert Control valve

Also Published As

Publication number Publication date
GB839676A (en) 1960-06-29
FR1057025A (en) 1954-03-04
GB726760A (en) 1955-03-23
FR65295E (en) 1956-02-08

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