GB2256015B - Improvements in or relating to transmissions of the toroidal-race rolling traction type - Google Patents

Improvements in or relating to transmissions of the toroidal-race rolling traction type

Info

Publication number
GB2256015B
GB2256015B GB9211214A GB9211214A GB2256015B GB 2256015 B GB2256015 B GB 2256015B GB 9211214 A GB9211214 A GB 9211214A GB 9211214 A GB9211214 A GB 9211214A GB 2256015 B GB2256015 B GB 2256015B
Authority
GB
United Kingdom
Prior art keywords
toroidal
transmissions
relating
traction type
rolling traction
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 - Fee Related
Application number
GB9211214A
Other versions
GB2256015A (en
GB9211214D0 (en
Inventor
Thomas George Fellows
Geoffrey Bernard Soar
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.)
Torotrak Development Ltd
Torotrak PLC
Original Assignee
Torotrak Development Ltd
Torotrak PLC
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
Priority claimed from GB898927156A external-priority patent/GB8927156D0/en
Application filed by Torotrak Development Ltd, Torotrak PLC filed Critical Torotrak Development Ltd
Priority to GB9211214A priority Critical patent/GB2256015B/en
Publication of GB9211214D0 publication Critical patent/GB9211214D0/en
Publication of GB2256015A publication Critical patent/GB2256015A/en
Application granted granted Critical
Publication of GB2256015B publication Critical patent/GB2256015B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H37/086—CVT using two coaxial friction members cooperating with at least one intermediate friction member
    • 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
GB9211214A 1989-12-01 1992-05-27 Improvements in or relating to transmissions of the toroidal-race rolling traction type Expired - Fee Related GB2256015B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9211214A GB2256015B (en) 1989-12-01 1992-05-27 Improvements in or relating to transmissions of the toroidal-race rolling traction type

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB898927156A GB8927156D0 (en) 1989-12-01 1989-12-01 Improvements in or relating to transmissions of the toroidal-race rolling-traction type
PCT/GB1990/001867 WO1991008406A1 (en) 1989-12-01 1990-11-30 Improvements in or relating to transmissions of the toroidal-race rolling-traction type
GB9211214A GB2256015B (en) 1989-12-01 1992-05-27 Improvements in or relating to transmissions of the toroidal-race rolling traction type

Publications (3)

Publication Number Publication Date
GB9211214D0 GB9211214D0 (en) 1992-08-12
GB2256015A GB2256015A (en) 1992-11-25
GB2256015B true GB2256015B (en) 1993-07-21

Family

ID=26296284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9211214A Expired - Fee Related GB2256015B (en) 1989-12-01 1992-05-27 Improvements in or relating to transmissions of the toroidal-race rolling traction type

Country Status (1)

Country Link
GB (1) GB2256015B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7014588B2 (en) * 2001-08-16 2006-03-21 Nsk Ltd. Toroidal-type continuously variable transmission and continuously variable transmission apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB957145A (en) * 1961-11-24 1964-05-06 Gen Motors Corp Improvements in variable-speed transmissions
US4693134A (en) * 1985-06-20 1987-09-15 Excelermatic Inc. High-powered vehicle drive train
EP0149892B1 (en) * 1983-12-02 1990-03-07 Torotrak (Development) Limited Continuously variable transmission system
WO1990007660A1 (en) * 1989-01-06 1990-07-12 Torotrak (Development) Limited Improvements in or relating to drivelines for wheeled vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB957145A (en) * 1961-11-24 1964-05-06 Gen Motors Corp Improvements in variable-speed transmissions
EP0149892B1 (en) * 1983-12-02 1990-03-07 Torotrak (Development) Limited Continuously variable transmission system
US4693134A (en) * 1985-06-20 1987-09-15 Excelermatic Inc. High-powered vehicle drive train
WO1990007660A1 (en) * 1989-01-06 1990-07-12 Torotrak (Development) Limited Improvements in or relating to drivelines for wheeled vehicles

Also Published As

Publication number Publication date
GB2256015A (en) 1992-11-25
GB9211214D0 (en) 1992-08-12

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20011130