GB993333A - Improvements in or relating to fluid pressure-operated braking apparatus - Google Patents

Improvements in or relating to fluid pressure-operated braking apparatus

Info

Publication number
GB993333A
GB993333A GB11433/63A GB1143363A GB993333A GB 993333 A GB993333 A GB 993333A GB 11433/63 A GB11433/63 A GB 11433/63A GB 1143363 A GB1143363 A GB 1143363A GB 993333 A GB993333 A GB 993333A
Authority
GB
United Kingdom
Prior art keywords
rod
pistons
brakes
compressed air
servomotor
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
GB11433/63A
Inventor
George Kenneth Farmery
Wilbur Mills Page
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 GB11433/63A priority Critical patent/GB993333A/en
Priority to US351295A priority patent/US3196618A/en
Priority to SE03497/64A priority patent/SE326644B/xx
Priority to BE645498D priority patent/BE645498A/xx
Priority to FR968042A priority patent/FR1388334A/en
Priority to NL6403027A priority patent/NL6403027A/xx
Priority to ES0297862A priority patent/ES297862A1/en
Priority to DE19641430714 priority patent/DE1430714A1/en
Publication of GB993333A publication Critical patent/GB993333A/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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/08—Brake cylinders other than ultimate actuators
    • B60T17/10—Two or more cylinders acting on the same brake with means for rendering them effective selectively or successively, the number of effective cylinders being variable
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • 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
    • 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
    • B60T13/241—Differential pressure systems
    • B60T13/246—The control valve is provided apart from the servomotor cylinder
    • 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
    • B60T13/26—Compressed-air systems
    • B60T13/40—Compressed-air systems indirect, i.e. compressed air booster units indirect systems
    • B60T13/44—Compressed-air systems indirect, i.e. compressed air booster units indirect systems with two-chamber booster units
    • 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
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Actuator (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

993,333. Fluid-pressure brakes. CLAYTON DEWANDRE CO. Ltd. March 5, 1964 [March 22, 1963], No. 11433/63. Headings F2E and F2F. In fluid-pressure braking apparatus of the kind having a dual control valve 19 for controlling the admission of compressed air or vacuum from a pair of independent reservoirs 18 to a dual compressed air or vacuum servomotor connected hydraulically with two independent sets of brakes 12, 13, the servomotor consists of a pair of cylinders 1, 2 arranged end-to-end, pistons 5, 6 in the respective cylinders and an operating rod 9 extending coaxially within the cylinders for operating the primary piston 10 of a tandem master cylinder 11 the separate outputs of which are connected to the brakes 12, 13, the rod 9 having abutment surfaces, formed by the rearward end and a shoulder 14 respectively, for contact with the pistons 5, 6 such that the combined thrust of the pistons 5, 6 is normally transmitted to the rod 9 but on failure of either section of the compressed air or vacuum system one piston only moves the rod 9 to actuate the master cylinder with reduced thrust. As shown, the servomotor is designed for operation by compressed air which is admitted to chambers behind the pistons 5, 6 on operation of the dual control valve 19 via pipes 20, 21. The chambers are formed respectively by end wall 1a of cylinder 1 and a dividing wall 3. Spring 16 returns the rod 9 when the brakes are released. A travel indicator is provided comprising a rod 24 contacted by piston 6 and having a coloured mark 26 which when visible indicates the need for brake adjustment. Alternatively an enlargement on the outer end of the rod 24 may operate a switch controlling a buzzer or indicator light (Fig. 3, not shown). Each of the pistons 5, 6 has both a ring seal 7 and a lubricant-impregnated felt or like ring 8.
GB11433/63A 1963-03-22 1963-03-22 Improvements in or relating to fluid pressure-operated braking apparatus Expired GB993333A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB11433/63A GB993333A (en) 1963-03-22 1963-03-22 Improvements in or relating to fluid pressure-operated braking apparatus
US351295A US3196618A (en) 1963-03-22 1964-03-12 Fluid pressure-operated braking apparatus
SE03497/64A SE326644B (en) 1963-03-22 1964-03-20
BE645498D BE645498A (en) 1963-03-22 1964-03-20
FR968042A FR1388334A (en) 1963-03-22 1964-03-20 Safety braking system with fluid pressure control
NL6403027A NL6403027A (en) 1963-03-22 1964-03-20
ES0297862A ES297862A1 (en) 1963-03-22 1964-03-21 Fluid pressure-operated braking apparatus
DE19641430714 DE1430714A1 (en) 1963-03-22 1964-03-21 Vehicle brake system with servo device activated by overpressure or underpressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11433/63A GB993333A (en) 1963-03-22 1963-03-22 Improvements in or relating to fluid pressure-operated braking apparatus

Publications (1)

Publication Number Publication Date
GB993333A true GB993333A (en) 1965-05-26

Family

ID=9986164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11433/63A Expired GB993333A (en) 1963-03-22 1963-03-22 Improvements in or relating to fluid pressure-operated braking apparatus

Country Status (7)

Country Link
US (1) US3196618A (en)
BE (1) BE645498A (en)
DE (1) DE1430714A1 (en)
ES (1) ES297862A1 (en)
GB (1) GB993333A (en)
NL (1) NL6403027A (en)
SE (1) SE326644B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462986A (en) * 1967-10-26 1969-08-26 Rockwell Standard Co Brake actuator
DE3909904A1 (en) * 1989-03-25 1990-10-04 Bosch Gmbh Robert Actuating cylinder, in particular for brakes, clutches or the like

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371484A (en) * 1966-03-14 1968-03-05 Bendix Corp Pedal and button actuated brake systems
JPS496070B1 (en) * 1969-03-15 1974-02-12
JPS5111779Y2 (en) * 1972-09-22 1976-03-30
US4206455A (en) * 1978-06-09 1980-06-03 Midland-Ross Corporation Piston overtravel indicator
US6113367A (en) * 1999-08-25 2000-09-05 Alliedsignal Truck Brake Systems Company Oil-less/oil-free air brake compressor with a dual piston arrangement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE730712C (en) * 1940-09-15 1943-01-16 Knorr Bremse Ag Compressed air brake with contact and locking piston
US2726738A (en) * 1951-02-07 1955-12-13 Thomas L Fawick Hydraulic, pneumatic and vacuum operated brakes
US2762396A (en) * 1952-08-23 1956-09-11 Thomas L Fawick Diaphragm and piston assembly
US2809723A (en) * 1955-02-23 1957-10-15 Insley Mfg Corp Parking brake
US2936785A (en) * 1956-06-13 1960-05-17 Hoppenstand Motors Inc Double diaphragm air cylinder
GB837576A (en) * 1957-12-10 1960-06-15 Dewandre Co Ltd C Improvements in or relating to fluid-pressure operated braking apparatus for vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462986A (en) * 1967-10-26 1969-08-26 Rockwell Standard Co Brake actuator
DE3909904A1 (en) * 1989-03-25 1990-10-04 Bosch Gmbh Robert Actuating cylinder, in particular for brakes, clutches or the like

Also Published As

Publication number Publication date
ES297862A1 (en) 1964-07-01
SE326644B (en) 1970-07-27
US3196618A (en) 1965-07-27
NL6403027A (en) 1964-09-23
DE1430714A1 (en) 1968-10-31
BE645498A (en) 1964-07-16

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