Friction gear transmission systems or components – Friction gear includes idler engaging facing concave surfaces – Toroidal
Reexamination Certificate
2003-09-11
2009-12-29
Joyce, William C (Department: 3656)
Friction gear transmission systems or components
Friction gear includes idler engaging facing concave surfaces
Toroidal
C476S042000, C476S046000
Reexamination Certificate
active
07637841
ABSTRACT:
A continuously variable ratio transmission unit having a housing (116) and input (102, 106) and output (100) discs paired to define first and second toroidal cavities. The discs (100, 102, 106) are mounted to the housing for rotation about a common axis. First (110) and second (112) rollers—or more typically first and second sets of rollers—are respectively arranged in the first and second cavities and serve to transmit drive between the input and output discs. First (130) and second (148, 150, 152) actuators act on the respective rollers. The first actuator is coupled to a first carrier part (126) which can be mated with the housing introducing it to the housing along a direction generally parallel to the variator axis. The second actuator is coupled to a second carrier part (146) which can be mated with the housing by introducing the second carrier part to the housing along a direction non-parallel to the variator axis.
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Patents Act 1977: Search Report under Section 17 for Great Britain Counterpart Application No. GB 0224646.0, 1 pg. (Apr. 3, 2003).
Standard European Search Report for GB Counterpart Patent Application No. 0224646.0, 3 pgs. (Apr. 24, 2003).
International Search Report for PCT Counterpart Application No. PCT/GB03/03948, 4 pgs (Dec. 12, 2003).
Blakely , Sokoloff, Taylor & Zafman LLP
Joyce William C
Torotrak (Development) Limited
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