GB689334A - Improvements in or relating to servo-assisted operating mechanism - Google Patents

Improvements in or relating to servo-assisted operating mechanism

Info

Publication number
GB689334A
GB689334A GB2642150A GB2642150A GB689334A GB 689334 A GB689334 A GB 689334A GB 2642150 A GB2642150 A GB 2642150A GB 2642150 A GB2642150 A GB 2642150A GB 689334 A GB689334 A GB 689334A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
pressure
servo
hydraulic
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
GB2642150A
Inventor
Stanley Howard Edge
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 GB2642150A priority Critical patent/GB689334A/en
Publication of GB689334A publication Critical patent/GB689334A/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
    • B60T13/24—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
    • B60T13/242—The control valve is provided as one unit with the servomotor cylinder
    • B60T13/245—Hydraulic command of the control valve, hydraulic transmission to the brake

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

689,334. Fluid pressure brakes. CLAYTON DEWANDRE CO., Ltd. Oct. 8, 1951 [Oct. 30, 1950], No. 26421/50. Class 103 (i). In a pneumatic servo unit for hydraulic pressure systems, particularly brake systems, of the type in which the output pressure from the hydraulic boost cylinder 32 is arranged to react upon a valve device 4 which controls the inlet and exhaust of fluid to and from the servocylinder 27, the piston 29 of the servo-cylinder has a single imperforate piston-rod 28 which extends into and acts as the only displacement member for the liquid in the hydraulic boost cylinder. As shown in Figure 2, the valve device 4 has a piston 5 to the top of which hydraulic pressure is applied by the actuator or master cylinder 2. The piston 5 operates through a pivoted lever 13, piston valves 9 and 10 controlling the application of vacuum or fluid pressure at connection 19 and the exhaust to atmosphere at connection 21 of the pressure in the servo-cylinder. A pipe 34 led led off the pipe 33 transmitting the output from the boost cylinder 32 to the brake cylinders, applies the brake cylinder pressure to a smaller piston 6 reacting against the piston 5, so that the hydraulic line pressure is always kept proportional to the pedal effort. A modified arrangement in which the valve device 4 is fitted directly adjacent the servo-cylinder is also described.
GB2642150A 1950-10-30 1950-10-30 Improvements in or relating to servo-assisted operating mechanism Expired GB689334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2642150A GB689334A (en) 1950-10-30 1950-10-30 Improvements in or relating to servo-assisted operating mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2642150A GB689334A (en) 1950-10-30 1950-10-30 Improvements in or relating to servo-assisted operating mechanism

Publications (1)

Publication Number Publication Date
GB689334A true GB689334A (en) 1953-03-25

Family

ID=10243374

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2642150A Expired GB689334A (en) 1950-10-30 1950-10-30 Improvements in or relating to servo-assisted operating mechanism

Country Status (1)

Country Link
GB (1) GB689334A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976847A (en) * 1955-06-02 1961-03-28 Edward A Rockwell Reservoir brake intensifier apparatus
US2976686A (en) * 1958-02-07 1961-03-28 Kelsey Hayes Co Booster brake mechanism
US3027879A (en) * 1959-09-28 1962-04-03 Bendix Corp Variable ratio force transmitting mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976847A (en) * 1955-06-02 1961-03-28 Edward A Rockwell Reservoir brake intensifier apparatus
US2976686A (en) * 1958-02-07 1961-03-28 Kelsey Hayes Co Booster brake mechanism
US3027879A (en) * 1959-09-28 1962-04-03 Bendix Corp Variable ratio force transmitting mechanism

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