GB966219A - Improvements in or relating to hydraulic pressure boosters - Google Patents

Improvements in or relating to hydraulic pressure boosters

Info

Publication number
GB966219A
GB966219A GB3052760A GB3052760A GB966219A GB 966219 A GB966219 A GB 966219A GB 3052760 A GB3052760 A GB 3052760A GB 3052760 A GB3052760 A GB 3052760A GB 966219 A GB966219 A GB 966219A
Authority
GB
United Kingdom
Prior art keywords
piston
chamber
pressure
wall
spring
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
GB3052760A
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.)
Fiat SpA
Original Assignee
Fiat SpA
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 Fiat SpA filed Critical Fiat SpA
Publication of GB966219A publication Critical patent/GB966219A/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
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum brakes
    • 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
    • B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
    • 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
    • F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
    • 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/46—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action
    • F16D51/48—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with two linked or directly-interacting brake shoes
    • F16D51/52—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with two linked or directly-interacting brake shoes fluid actuated
    • 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)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

966,219. Fluid-pressure brakes. FIAT S.p.A., and P. S. BALDWIN. Sept. 5, 1960 [Sept. 5, 1959], No. 30527/60. Headings F2E and F2F. An hydraulic pressure booster cylinder for vehicle brakes comprises a cylindrical chamber 11 closed at one end by a wall 11a and at the other by a member 12, a connection 31 to a pressure liquid source being provided near the wall 11a, and a piston 13 slidably mounted in the chamber 11 adjacent the wall 11a so that its end wall face is subjected to the pressure liquid and it subdivides the chamber 11 into two chambers A and B interconnected by a passageway, the flow of liquid through which is controlled by a lift valve 26. A reaction spring 20 is interposed between the piston 13 and a washer 21 abutted by an expansible ring 22 carried by the cylinder casing. The valve interconnects the chambers A and B when the auxiliary piston 13 is near the wall 11a at the end of its stroke, but cuts them off after the auxiliary piston 13 is displaced against the spring 20 and prevents return of pressure liquid from the chamber A to the chamber B when the pressure in A exceeds that in B; the spring 20 being mounted under an initial load to allow displacement of the auxiliary piston 13 to occur only when the pressure in the cylinder reaches a predetermined value p1. As shown in Fig. 1, the member 12 is movable and actuates a brake pad whilst the space A is connected through opening 38 to an actuator for another brake pad. In modifications, the lift valve 26 is omitted and the connection between spaces A and B is interrupted by the closure of a passage by the piston itself or by a packing ring carried by the piston. The member 12 may be fired and the space A may be connected to actuators for the brake pads. Specifications 688,382 and 966,218 are referred to.
GB3052760A 1959-09-05 1960-09-05 Improvements in or relating to hydraulic pressure boosters Expired GB966219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1503759 1959-09-05

Publications (1)

Publication Number Publication Date
GB966219A true GB966219A (en) 1964-08-06

Family

ID=11146207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3052760A Expired GB966219A (en) 1959-09-05 1960-09-05 Improvements in or relating to hydraulic pressure boosters

Country Status (3)

Country Link
ES (1) ES257158A1 (en)
GB (1) GB966219A (en)
NL (1) NL258337A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112024602A (en) * 2020-08-14 2020-12-04 湖南科美达重工有限公司 Double-stroke expansion and contraction oil cylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112024602A (en) * 2020-08-14 2020-12-04 湖南科美达重工有限公司 Double-stroke expansion and contraction oil cylinder

Also Published As

Publication number Publication date
ES257158A1 (en) 1960-07-16
NL258337A (en)

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