GB889804A - Improvements relating to fluid-pressure-operated braking mechanisms for trailer vehicles - Google Patents

Improvements relating to fluid-pressure-operated braking mechanisms for trailer vehicles

Info

Publication number
GB889804A
GB889804A GB3204357A GB3204357A GB889804A GB 889804 A GB889804 A GB 889804A GB 3204357 A GB3204357 A GB 3204357A GB 3204357 A GB3204357 A GB 3204357A GB 889804 A GB889804 A GB 889804A
Authority
GB
United Kingdom
Prior art keywords
spring
valve
pressure
vacuum
trailer
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
GB3204357A
Inventor
Donald Henry Ballard
George Kenneth Farmery
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 Automotive UK Ltd
Original Assignee
Clayton Dewandre 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 Clayton Dewandre Co Ltd filed Critical Clayton Dewandre Co Ltd
Priority to GB3204357A priority Critical patent/GB889804A/en
Priority to DEC17667A priority patent/DE1248491B/en
Publication of GB889804A publication Critical patent/GB889804A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
    • F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
    • F16K7/16—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being mechanically actuated, e.g. by screw-spindle or cam
    • 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
    • B60T13/24—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 the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/48—Vacuum systems direct, i.e. brakes applied directly by vacuum
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
    • B60T8/1837—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the load-detecting arrangements
    • B60T8/185—Arrangements for detecting vehicle level

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
  • Safety Valves (AREA)

Abstract

889,804. Fluid-pressure brakes. CLAYTON DEWANDRE CO. Ltd. Sept. 29, 1958 [Oct. 14, 1957], No. 32043/57. Class 103 (1). A fluid pressure-operated braking mechanism for a trailer vehicle,and of the kind in which the maximum pressure attainable in the brake actuating means is dependent upon the vehicle load, comprises a control valve 1 in a compressed-air, or vacuum, line 3 to the brakeactuating means 4, the valve 1 including a movable valve element 13 coacting with a valve seat 14 to control the fluid flow through said line 3 and spring-urged away from the seating, and pressure-responsive means sub. jected to the pressure in line 3 and acting against the spring 20 to close the valve, the spring 20 acting between the valve element 13 and a member 18 which is movable with a sprung part of the vehicle relatively to an unsprung part. The valve 1 is mounted on the platform 2 of the trailer vehicle, and a roller 19 on the tubular thrust member 18 is lifted by a lever 22 pivoted to a rod 24 in turn hinged to a member 25 fixed to the wheel axle. A diaphragm 7 and the element 13 are attached to a rod 15 and collar 21 which are thrust upwards by a coil spring 20. If the trailer is unladen, the distance from wheel axle to platform 2 is the maximum, shown in Fig. 1; member 18 projects the maximum and spring 20 has minimum compression. When the tractor servo is operated, vacuum is supplied to cylinders 4 through line 3 and passages 9, 10, 11 and 12 of valve 13, 14, and lower part 6b of the diaphragm chamber, to apply the brakes. This vacuum will also act on the underside of diaphragm 7, and when the pressure differential so created over the diaphragm overcomes the loading of the spring 20 the element 13 moves down on to seat 14 to interrupt the vacuum to the trailer brake cylinders 4 and limit the degree of braking. Since the trailer is unloaded the compression of spring 20 is relatively light and the degree of permissible braking is correspondingly limited. Loading of the vehicle lowers the platform 2, and the lever 22 is rocked clockwise about its pivot on the bracket 23, whereby member 18 is moved upwards in tube 17 to compress spring 20. Hence, a higher degree of vacuum is needed to overcome the spring loading on the diaphragm, giving a correspondingly increased degree of braking.
GB3204357A 1957-10-14 1957-10-14 Improvements relating to fluid-pressure-operated braking mechanisms for trailer vehicles Expired GB889804A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3204357A GB889804A (en) 1957-10-14 1957-10-14 Improvements relating to fluid-pressure-operated braking mechanisms for trailer vehicles
DEC17667A DE1248491B (en) 1957-10-14 1958-10-14 Pressure relief valve in a suction air brake system for vehicles, especially motor vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3204357A GB889804A (en) 1957-10-14 1957-10-14 Improvements relating to fluid-pressure-operated braking mechanisms for trailer vehicles

Publications (1)

Publication Number Publication Date
GB889804A true GB889804A (en) 1962-02-21

Family

ID=10332247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3204357A Expired GB889804A (en) 1957-10-14 1957-10-14 Improvements relating to fluid-pressure-operated braking mechanisms for trailer vehicles

Country Status (2)

Country Link
DE (1) DE1248491B (en)
GB (1) GB889804A (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB300199A (en) * 1928-03-28 1930-01-27 Caleb Smith Bragg
US1872659A (en) * 1928-05-25 1932-08-23 Bragg Kliesrath Corp Brake system for automotive vehicles
DE689702C (en) * 1938-09-29 1940-04-01 Hessenwerk Rudolf Majert Kom G Active regulation of the brake pressure depending on the load on the vehicle
FR884078A (en) * 1940-12-23 1943-08-02 Westinghouse Bremsen Gmbh Load-dependent automatic brake controller for compressed fluid brakes
DE736389C (en) * 1942-02-17 1943-06-15 Bosch Gmbh Robert Brake force regulator for air brakes in vehicles, in particular motor vehicle trailers
DE872454C (en) * 1950-12-24 1953-04-02 Bosch Gmbh Robert Pressure medium brake for vehicles, in particular compressed air brake for motor vehicle trailers
FR1097642A (en) * 1953-01-19 1955-07-07 Anti-slip brake device for automobiles
DE1741896U (en) * 1955-10-25 1957-03-21 Knorr Bremse Gmbh TWO-ARM VIBRATION DETECTOR FOR LOAD-DEPENDENT COMPRESSED AIR BRAKES.

Also Published As

Publication number Publication date
DE1248491B (en) 1967-08-24

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