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GB2018894A - Fluid pressure operated actuator - Google Patents

Fluid pressure operated actuator

Info

Publication number
GB2018894A
GB2018894A GB7912444A GB7912444A GB2018894A GB 2018894 A GB2018894 A GB 2018894A GB 7912444 A GB7912444 A GB 7912444A GB 7912444 A GB7912444 A GB 7912444A GB 2018894 A GB2018894 A GB 2018894A
Authority
GB
United Kingdom
Prior art keywords
cylinder
actuator
space
zones
fluid pressure
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.)
Granted
Application number
GB7912444A
Other versions
GB2018894B (en
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.)
BRIE PERRY F G DE
Original Assignee
BRIE PERRY F G DE
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 BRIE PERRY F G DE filed Critical BRIE PERRY F G DE
Priority to GB7912444A priority Critical patent/GB2018894B/en
Publication of GB2018894A publication Critical patent/GB2018894A/en
Application granted granted Critical
Publication of GB2018894B publication Critical patent/GB2018894B/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
    • F16H—GEARING
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
    • 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
    • F16H—GEARING
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
    • F16H2015/383—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces with two or more sets of toroid gearings arranged in parallel
    • 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
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
    • F16H61/664—Friction gearings
    • F16H61/6649—Friction gearings characterised by the means for controlling the torque transmitting capability of the gearing

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)

Abstract

A piston-and-cylinder type actuator, for use particularly in steplessly-variable-ratio transmission units of the toroidal race rolling friction type. In such units the actuator may serve to thrust the input and output members and their intermediate rollers into engagement, so that drive will be transmitted. According to the invention enhanced thrust is obtained by interposing auxiliary pistons (6, 7) in the space between the main piston (1) and the end (4) of the cylinder (2). One of pistons 6, 7 is linked to the main piston 1 and the other to cylinder 2, and they divide the said space into two pressurised zones (16, 18) with a vented zone between them. Where the actuator has to rotate about the cylinder axis, unwanted centrifugal forces generated within zones 16, 18 may be diminished by forming the vented zone so that a quantity of fluid may accumulate in it. <IMAGE>
GB7912444A 1978-04-11 1979-04-09 Fluid pressure operated actuator Expired GB2018894B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7912444A GB2018894B (en) 1978-04-11 1979-04-09 Fluid pressure operated actuator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1414478 1978-04-11
GB7912444A GB2018894B (en) 1978-04-11 1979-04-09 Fluid pressure operated actuator

Publications (2)

Publication Number Publication Date
GB2018894A true GB2018894A (en) 1979-10-24
GB2018894B GB2018894B (en) 1983-01-06

Family

ID=26250352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7912444A Expired GB2018894B (en) 1978-04-11 1979-04-09 Fluid pressure operated actuator

Country Status (1)

Country Link
GB (1) GB2018894B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190032A1 (en) * 1985-01-30 1986-08-06 National Research Development Corporation A rolling traction automotive transmission
US5027669A (en) * 1988-12-16 1991-07-02 Nissan Motor Co., Ltd. Dual toroidal cavity type continuously variable transmission
US5052236A (en) * 1988-12-16 1991-10-01 Nissan Motor Co., Ltd. Forward and reverse hydraulic control for toroidal continuously variable transmission
EP0466113A1 (en) * 1990-07-10 1992-01-15 Nissan Motor Co., Ltd. Continously variable traction roller transmission
US5099710A (en) * 1988-12-16 1992-03-31 Nissan Motor Co., Ltd. Continuously variable transmission system having parallel drive paths with fluid control valve including pressure equalization
US5308297A (en) * 1989-12-01 1994-05-03 Torotrak (Development) Limited Transmissions of the toroidal-race rolling-traction type
US5679090A (en) * 1994-11-07 1997-10-21 Nsk Ltd. Half-toroidal-type continuously variable transmission having two sets of three rollers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190032A1 (en) * 1985-01-30 1986-08-06 National Research Development Corporation A rolling traction automotive transmission
US4713978A (en) * 1985-01-30 1987-12-22 National Research Development Corporation Automotive transmissions of the rolling traction type
US5027669A (en) * 1988-12-16 1991-07-02 Nissan Motor Co., Ltd. Dual toroidal cavity type continuously variable transmission
US5052236A (en) * 1988-12-16 1991-10-01 Nissan Motor Co., Ltd. Forward and reverse hydraulic control for toroidal continuously variable transmission
US5099710A (en) * 1988-12-16 1992-03-31 Nissan Motor Co., Ltd. Continuously variable transmission system having parallel drive paths with fluid control valve including pressure equalization
US5308297A (en) * 1989-12-01 1994-05-03 Torotrak (Development) Limited Transmissions of the toroidal-race rolling-traction type
EP0466113A1 (en) * 1990-07-10 1992-01-15 Nissan Motor Co., Ltd. Continously variable traction roller transmission
US5144850A (en) * 1990-07-10 1992-09-08 Nissan Motor Co., Ltd. Continuously variable traction roller transmission
US5679090A (en) * 1994-11-07 1997-10-21 Nsk Ltd. Half-toroidal-type continuously variable transmission having two sets of three rollers

Also Published As

Publication number Publication date
GB2018894B (en) 1983-01-06

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee