GB749488A - Improvements in master-cylinders - Google Patents

Improvements in master-cylinders

Info

Publication number
GB749488A
GB749488A GB3628653A GB3628653A GB749488A GB 749488 A GB749488 A GB 749488A GB 3628653 A GB3628653 A GB 3628653A GB 3628653 A GB3628653 A GB 3628653A GB 749488 A GB749488 A GB 749488A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
cap
fitted
diameter end
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
GB3628653A
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 GB3628653A priority Critical patent/GB749488A/en
Priority to DED19443A priority patent/DE1082515B/en
Priority to FR1116737D priority patent/FR1116737A/en
Publication of GB749488A publication Critical patent/GB749488A/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
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid

Landscapes

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

Abstract

749,488. Hydraulic master-cylinders. DUNLOP RUBBER CO., Ltd., and TREVASKIS, H. W. Dec. 17, 1954 [Dec. 31, 1953], No. 36286/53. Class 103 (1). A master-cylinder, particularly for use in vehicle braking systems, comprises a stepped cylinder having the smaller diameter end thereof communicating with a mechanism to be operated and the larger diameter end communicating with a liquid reservoir, a piston slidablo in the small diameter end but normally located, when the master cylinder is inoperative, in the larger diameter end and a piston seal, e.g. a washer, abutting the operative face of the piston and adapted to be deflected around an associated domed portion to allow passage of liquid from the larger diameter end to the smaller diameter end when the pressure in the former end is greater than in the latter end. In the embodiment illustrated, the master cylinder comprises a body portion 1 having a cylindrical cavity 2 communicating with a liquid reservoir 4. An end cover 6 is secured to one end of body portion 1 and is provided with an integral sleeve 7 which fits coaxially within the cavity 2; the sleeve 7 having a bore 8 which constitutes the smaller diameter end or the working cylinder of the master cylinder. Slidably and fluid-tightly fitted through a bush 10 fitted in the end of the cavity 2 is a push-rod 11 having a cap 12 fitted to the end of the push-rod projecting exterior of the cavity 2; a helical spring 13 being fitted between the cap 12 and the adjacent end of the body portion 1 and protected from dirt and the like by a cylindrical shield 14 secured to cap 12. The end of the push-rod remote from the cap 12 is provided with a reduced diameter portion 15 on which is fitted a piston 16. When the master cylinder is in the inoperative position (as illustrated) the piston 16 is located in the cavity 2 of the body portion 1 but is a slidable fit in the working cylinder 8. A sealing washer 18, being a slidable fluid-tight fit in the working cylinder 8, is fitted on the reduced portion 15 of the push-rod, abuts a side of the piston 16, and is maintained in position by a locator 19 having a domed portion 22 which is slidable in the working cylinder and acts as a guide for the piston 16. On depression of the cap 12 against spring 13 the piston 16 is forced into working cylinder 8; the increased pressure causing the sealing washer to flatten against the piston 16 to prevent leakage past the periphery thereof. The liquid in the working cylinder 8 and the system communicating therewith, via nozzle 9, is thereby pressurized. On removal of the pressure from the cap 12 the spring 13 moves the piston 16 to its inoperative position shown. If the hydraulic system needs replenishing, the pressure on the working side sure on the working side 18 will be less than the pressure on the other side of the washer due to the static head of liquid in the reservoir. This pressure differential causes the sealing washer 18 to flex against the domed portion of the locator 19 and permit liquid to flow from the reservoir 4 past the periphery of washer 18 to replenish the system.
GB3628653A 1953-12-31 1953-12-31 Improvements in master-cylinders Expired GB749488A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3628653A GB749488A (en) 1953-12-31 1953-12-31 Improvements in master-cylinders
DED19443A DE1082515B (en) 1953-12-31 1954-12-29 Master cylinder for hydraulic systems, especially for brake actuation systems in motor vehicles
FR1116737D FR1116737A (en) 1953-12-31 1954-12-31 Master cylinder upgrades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3628653A GB749488A (en) 1953-12-31 1953-12-31 Improvements in master-cylinders

Publications (1)

Publication Number Publication Date
GB749488A true GB749488A (en) 1956-05-23

Family

ID=10386718

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3628653A Expired GB749488A (en) 1953-12-31 1953-12-31 Improvements in master-cylinders

Country Status (3)

Country Link
DE (1) DE1082515B (en)
FR (1) FR1116737A (en)
GB (1) GB749488A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178890A (en) * 1962-04-02 1965-04-20 Wagner Electric Corp Pressure generating means
EP0083277A1 (en) * 1981-12-27 1983-07-06 The Bendix Corporation Master cylinder assembly and method for manufacturing the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3111411A1 (en) * 1981-03-24 1982-10-07 FAG Kugelfischer Georg Schäfer & Co, 8720 Schweinfurt TRAINING A MASTER CYLINDER FOR HYDRAULIC BRAKE OR CLUTCH SYSTEMS

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819482A (en) * 1928-01-31 1931-08-18 Pentz Motor Brake Corp Master cylinder
US2433213A (en) * 1946-05-02 1947-12-23 New York Air Brake Co Air bleeding means for master cylinders
FR1006383A (en) * 1948-01-05 1952-04-22 Hydraulic braking device fitted with a pressure cylinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178890A (en) * 1962-04-02 1965-04-20 Wagner Electric Corp Pressure generating means
EP0083277A1 (en) * 1981-12-27 1983-07-06 The Bendix Corporation Master cylinder assembly and method for manufacturing the same

Also Published As

Publication number Publication date
FR1116737A (en) 1956-05-11
DE1082515B (en) 1960-05-25

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