GB721392A - Improvements in hydraulic brakes - Google Patents

Improvements in hydraulic brakes

Info

Publication number
GB721392A
GB721392A GB1464552A GB1464552A GB721392A GB 721392 A GB721392 A GB 721392A GB 1464552 A GB1464552 A GB 1464552A GB 1464552 A GB1464552 A GB 1464552A GB 721392 A GB721392 A GB 721392A
Authority
GB
United Kingdom
Prior art keywords
cylinder
piston
disc
hydraulic
rotatable
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
GB1464552A
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 GB1464552A priority Critical patent/GB721392A/en
Priority to FR1085923D priority patent/FR1085923A/en
Publication of GB721392A publication Critical patent/GB721392A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/228—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a separate actuating member for each side

Landscapes

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

Abstract

721,392. Hydraulic brakes. DUNLOP RUBBER CO., Ltd., and BUTLER, H. J. May 4, 1953 [June 11, 1952]. No. 14645/52. Class 103 (1). In a hydraulic braking system comprising a rotatable braking member, non-rotatable pads of friction material, actuated by a hydraulically operated piston and cylinder mechanism, to frictionally engage the braking member, said piston being provided with a seal fluid-tightly engaging with the wall of the cylinder, and a hydraulic reservoir open to atmospheric pressure and communicating, when the system is unpressurized, through a master-cylinder with the cylinder of said mechanism, the frictional force of the piston seal on the cylinder well is greater than the force exerted on the piston by the static head of hydraulic liquid. The invention is illustrated applied to a " spot-type disc brake in which an annular disc 1 rotatable with a vehicle wheel 2 is braked by hydraulically operated piston and cylinder mechanisms 4 and friction pads 5 operable in a non-rotatable housing 3 straddling a portion of the outer periphery of the disc to engage the radially extending sides of the disc as described in Specification 688,382. Hydraulic fluid supplied from a reservoir 12, situated above a master cylinder 7 is pressurized by the actuation of foot-pedal 9 to supply pressure to actuate the friction pads 5. The piston of each piston and cylinder mechanism 4 is provided with an annular groove in which is fitted a sealing ring 15 to prevent leakage of liquid past the cylinder and also to provide frictional resistance against the cylinder walls so that each piston will not move under the influence of the unpressurized head of liquid above. When the brakes are applied, the brake disc expands axially, outwardly forcing the pad and piston back slightly into the cylinder against the liquid pressure. On removal of the liquid pressure, the pistons and friction pads remain in the same position in the cylinder and the disc cools, contracting axially, thus providing or increasing, clearance between each pad and the disc. This invention could similarly be applied to hydraulically operated external shoe drum brakes but not to internal shoe-drum brakes. The Provisional Specification refers to Specifications 650,976 and 688,382.
GB1464552A 1952-06-11 1952-06-11 Improvements in hydraulic brakes Expired GB721392A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1464552A GB721392A (en) 1952-06-11 1952-06-11 Improvements in hydraulic brakes
FR1085923D FR1085923A (en) 1952-06-11 1953-06-10 Brake improvements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1464552A GB721392A (en) 1952-06-11 1952-06-11 Improvements in hydraulic brakes

Publications (1)

Publication Number Publication Date
GB721392A true GB721392A (en) 1955-01-05

Family

ID=10044992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1464552A Expired GB721392A (en) 1952-06-11 1952-06-11 Improvements in hydraulic brakes

Country Status (2)

Country Link
FR (1) FR1085923A (en)
GB (1) GB721392A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013126941A1 (en) * 2012-02-29 2013-09-06 Waratah Engineering Pty Ltd Actuator assembly for a vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013126941A1 (en) * 2012-02-29 2013-09-06 Waratah Engineering Pty Ltd Actuator assembly for a vehicle

Also Published As

Publication number Publication date
FR1085923A (en) 1955-02-08

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