GB731711A - Hydraulic braking systems - Google Patents

Hydraulic braking systems

Info

Publication number
GB731711A
GB731711A GB3049752A GB3049752A GB731711A GB 731711 A GB731711 A GB 731711A GB 3049752 A GB3049752 A GB 3049752A GB 3049752 A GB3049752 A GB 3049752A GB 731711 A GB731711 A GB 731711A
Authority
GB
United Kingdom
Prior art keywords
reservoir
atmospheric pressure
brakes
brake
valve
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
GB3049752A
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.)
Dunlop Rubber Co Ltd
Original Assignee
Dunlop Rubber 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 Dunlop Rubber Co Ltd filed Critical Dunlop Rubber Co Ltd
Priority to GB3049752A priority Critical patent/GB731711A/en
Priority to FR1096238D priority patent/FR1096238A/en
Publication of GB731711A publication Critical patent/GB731711A/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
    • 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
    • B60T11/22—Master control, e.g. master cylinders characterised by being integral with reservoir

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

731,711. Hydraulic brakes. DUNLOP RUBBER CO., Ltd., and BUTLER, H. J. Oct. 26, 1953 [Dec. 2, 1952], No. 30497/52. Class 103 (1). In a hydraulic braking system comprising a master cylinder communicating with a liquid reservoir and a hydraulic ally-operated mechanism for actuating a brake, the reservoir is provided with a valve communicating with the atmosphere and spring-loaded so as to maintain the pressure in the reservoir below atmospheric pressure. Fig. 1 illustrates a general arrangement of a hydraulic braking system for a vehicle in which the master cylinder 1 is supplied with hydraulic fluid by a reservoir 3 equipped with a filler cap 7, provided with a spring-loaded valve 14, in the inoperative position of the master-cylinder piston 2 illustrated. An outlet connection from the master cylinder connects the piston and cylinder mechanism 6 associated with each of the wheel brakes (in this case disc brakes) via pipe lines 5. When the system is being primed, the bleed vents are left open and the master cylinder is operated to expel a predetermined quantity of liquid from the system. The liquid level in the reservoir 3 is thereby lowered and since the valve 14 remains closed, by reason of the helical spring 15, to exclude the air from the atmosphere via conduit 12, the pressure of the air in the reservoir falls to a value less than atmospheric pressure. The bleed vents are then closed and when the brake is idle, there is. no force in the system which tends to move the pistons of the brake-actuating mechanisms towards the disc. The sub-atmospheric pressure existing in the system tends to move the pistons backward a small amount to prevent rubbing contact with the disc in the inoperative condition of the brakes. However, when a predetermined sub-atmospheric pressure is reached, due to friction pad wear or leakage, the valve 14 opens against its spring 15 and allows air into the reservoir to bring the pressure therein up to the predetermined value; this value always being lower than atmospheric pressure. Although described in connection with disc brakes, the invention is also applicable to drum or other types of brake. Specification 688,382 is referred to.
GB3049752A 1952-12-02 1952-12-02 Hydraulic braking systems Expired GB731711A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3049752A GB731711A (en) 1952-12-02 1952-12-02 Hydraulic braking systems
FR1096238D FR1096238A (en) 1952-12-02 1953-12-01 Braking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3049752A GB731711A (en) 1952-12-02 1952-12-02 Hydraulic braking systems

Publications (1)

Publication Number Publication Date
GB731711A true GB731711A (en) 1955-06-15

Family

ID=10308601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3049752A Expired GB731711A (en) 1952-12-02 1952-12-02 Hydraulic braking systems

Country Status (2)

Country Link
FR (1) FR1096238A (en)
GB (1) GB731711A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110203185A (en) * 2019-05-28 2019-09-06 万向钱潮股份有限公司 A kind of master cylinder with liquid storage chamber
US20210261109A1 (en) * 2020-02-26 2021-08-26 ZF Active Safety US Inc. Vehicle brake system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10047328A1 (en) * 2000-09-25 2002-04-11 Continental Teves Ag & Co Ohg Expansion tank with an air channel molded into the lid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110203185A (en) * 2019-05-28 2019-09-06 万向钱潮股份有限公司 A kind of master cylinder with liquid storage chamber
CN110203185B (en) * 2019-05-28 2023-10-24 万向钱潮股份公司 Brake master cylinder with liquid storage cavity
US20210261109A1 (en) * 2020-02-26 2021-08-26 ZF Active Safety US Inc. Vehicle brake system
US11904819B2 (en) * 2020-02-26 2024-02-20 ZF Active Safety US. Inc. Vehicle brake system

Also Published As

Publication number Publication date
FR1096238A (en) 1955-06-16

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