GB687658A - Improvements in or relating to servo-assisted operating mechanism - Google Patents

Improvements in or relating to servo-assisted operating mechanism

Info

Publication number
GB687658A
GB687658A GB1699049A GB1699049A GB687658A GB 687658 A GB687658 A GB 687658A GB 1699049 A GB1699049 A GB 1699049A GB 1699049 A GB1699049 A GB 1699049A GB 687658 A GB687658 A GB 687658A
Authority
GB
United Kingdom
Prior art keywords
vacuum
cylinder
valve
servo
piston
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
GB1699049A
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 GB1699049A priority Critical patent/GB687658A/en
Publication of GB687658A publication Critical patent/GB687658A/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

Abstract

687,658. Vacuum servo-brakes. CLAYTON DEWANDRE CO., Ltd. June 27, 1950 [June 27, 1949], No. 16990/49. Class 103 (i). A servo-braking device of the type wherein the hydraulic pressure exerted by a master cylinder 2 and capable of acting directly through pipe 3, cylinders 4 and 9 and pipe 5 upon the brake cylinders, is proportionately amplified by vacuum operating in a cylinder 20 on a piston 19, is characterized in that the vacuum force applied is raised in accordance with the hydraulic pressure exerted by means of a piston 27, in a cylinder branched off the hydraulic circuit, which acts upon a pivoted lever 29 to operate a valve controlling the degree of vacuum. A rod 31, pivoted to the free end of the lever 29, depends into a valve chamber 32 and is connected to a cylindrical valve casing 34 resiliently secured by a diaphragm 35 to the sides of the chamber. The vacuum cylinder 20 is normally connected to atmosphere by a passage 44, a passage through the base 37 of the valve casing and ports 36 and 33 in the top of the valve casing and chamber. When the lever 29 is lifted as a result of hydraulic pressure acting on the piston 27 the casing 34 is raised so that the ports in the base are first closed by engagement with a disc valve member 40 and communication between the cylinder 20 and a source of vacuum is established through passage 39. Specifica. tion 550,450, [Group XXXII], is referred to.
GB1699049A 1949-06-27 1949-06-27 Improvements in or relating to servo-assisted operating mechanism Expired GB687658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1699049A GB687658A (en) 1949-06-27 1949-06-27 Improvements in or relating to servo-assisted operating mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1699049A GB687658A (en) 1949-06-27 1949-06-27 Improvements in or relating to servo-assisted operating mechanism

Publications (1)

Publication Number Publication Date
GB687658A true GB687658A (en) 1953-02-18

Family

ID=10087234

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1699049A Expired GB687658A (en) 1949-06-27 1949-06-27 Improvements in or relating to servo-assisted operating mechanism

Country Status (1)

Country Link
GB (1) GB687658A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935709A (en) * 1974-02-11 1976-02-03 General Motors Corporation Dual power brake booster
FR2325833A1 (en) * 1975-09-26 1977-04-22 Midland Ross Corp COMBINED HYDRAULIC AND VACUUM SERVO-CONTROL

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935709A (en) * 1974-02-11 1976-02-03 General Motors Corporation Dual power brake booster
FR2325833A1 (en) * 1975-09-26 1977-04-22 Midland Ross Corp COMBINED HYDRAULIC AND VACUUM SERVO-CONTROL

Similar Documents

Publication Publication Date Title
GB1092406A (en) Evacuating valve assembly for a hydraulic jack
GB1012059A (en) Improvements relating to variable load brake control apparatus
ES442435A1 (en) Servo-power-assisted hydraulic brake-actuating arrangement
GB687658A (en) Improvements in or relating to servo-assisted operating mechanism
GB928334A (en) Improvements in or relating to fluid-flow control valves
GB300174A (en) Improvement in power actuator
GB667736A (en) Improvements in or relating to the braking of tractor and trailer vehicles
GB1131613A (en) Improvements in fluid-pressure operated boosters or servo-motors
GB708285A (en) Compressed air-hydraulically actuated brakes, particularly for power vehicles
GB970540A (en) Improvements in or relating to valve mechanism for controlling servo-devices of the differential air pressure type
GB1287972A (en)
GB671959A (en) Improvements in or relating to master-cylinders for hydraulic brakes
GB698073A (en) Improvements in or relating to hydraulic controlling valves
GB897778A (en) Hydraulic lift systems in particular for tractor mounted implements
GB689334A (en) Improvements in or relating to servo-assisted operating mechanism
GB747852A (en) Improvements in tractor hydraulic systems
GB1174244A (en) Control Valve
GB524564A (en) Improvements in piston type control valves for hydraulic presses
GB724203A (en) Improvements in and relating to hydraulic control valves
GB848111A (en) Fluid pressure braking system for railway vehicles
GB707776A (en) Brakes for colliery and other winding machinery
GB1368654A (en) Pneumatically-operated valve for use with for example hydraulic cylinders used in consolidating means for mineworkings
GB668029A (en) Improvements in or relating to hydraulic pressure control valves
GB1082088A (en) Improvements in or relating to fluid pressure control valves
GB553373A (en) Improvements in control valves