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US 7,351,181 B2Granted
Continuously variable transmission
OwnerRobert Smithinventor
Life of this patent
Estimating the term…
Abstract
A continuously variable transmission includes at least one transmitter having two graduated surfaces mounted to provide frictional engagement with a driving cylinder and a driven cylinder. A shifter having two graduated surfaces is axially mounted within the housing. The transmitter is not mounted on a shaft, but is urged into engagement with the driving cylinder and the driven cylinder by two elongated followers. Each follower includes a first end and an opposing second end. Axial movement of the shifter provides simultaneous and opposing movement of the first and second followers to impart pivotal movement of the axis of rotation of the transmitter.
Claims18
An apparatus for providing continuously variable transmission of energy from a drive cylinder to a driven cylinder, said apparatus comprising:
- a housing;
- at least one double-conical transmitter having an axis of rotation, located adjacent to said housing and comprising a first conical surface having a base and a coaxial second conical surface having a base generally adjacent to said base of said first conical surface, said first conical surface frictionally engaging a drive cylinder and said second conical surface frictionally engaging a driven cylinder;
- a shifter located within said housing and comprising a first conical surface and a coaxial second conical surface, said shifter being longitudinally movable;
- a first elongated follower having a first end and a second end extending radially from said shifter and mounted within said housing for longitudinal movement, said first end of said first elongated follower frictionally engaging said first conical surface of said shifter and said second end of said first elongated follower rotatably engaging said first surface of said first conical surface of said transmitter;
- a second elongated follower having a first end and a second end extending radially from said shifter and mounted within said housing for longitudinal movement, said first end of said second elongated follower frictionally engaging said second conical surface of said shifter and said second end of said second elongated follower rotatably engaging said second conical surface of said transmitter;
- whereby axial movement of said shifter provides simultaneous and opposing movement of said first and second followers to impart pivotal movement of the axis of rotation of said transmitter.
3 more elements
An apparatus for providing continuously variable transmission of energy from a drive cylinder to a driven cylinder, said apparatus comprising:
- a housing;
- at least one double-conical transmitter comprising a first conical surface and a coaxial second conical surface and having an axis of rotation, located adjacent to said housing and comprising, said first conical surface frictionally engaging a drive cylinder and said second conical surface frictionally engaging a driven cylinder;
- a shifter located within said housing and comprising a first conical surface having a base and a coaxial second conical surface having a base generally adjacent to said base of said first conical surface, said shifter being longitudinally movable;
- a first elongated follower having a first end and a second end extending radially from said shifter and mounted within said housing for longitudinal movement, said first end of said first elongated follower frictionally engaging said first conical surface of said shifter and said second end of said first elongated follower rotatably engaging said first surface of said first conical surface of said transmitter;
- a second elongated follower having a first end and a second end extending radially from said shifter and mounted within said housing for longitudinal movement, said first end of said second elongated follower frictionally engaging said second conical surface of said shifter and said second end of said second elongated follower rotatably engaging said second conical surface of said transmitter;
- whereby axial movement of said shifter provides simultaneous and opposing movement of said first and second followers to impart pivotal movement of the axis of rotation of said transmitter.
3 more elements
An apparatus for providing continuously variable transmission of energy from a drive cylinder to a driven cylinder, said apparatus comprising:
- a housing;
- at least one elongated transmitter having an axis of rotation, located adjacent to said housing and comprising a first graduated surface having a base and a coaxial second graduated surface having a base generally adjacent to said base of said first graduated surface, said first graduated surface frictionally engaging a drive cylinder and said second graduated surface frictionally engaging a driven cylinder;
- a shifter located within said housing and comprising a first graduated surface and a coaxial second graduated surface, said shifter being longitudinally movable;
- a first elongated follower having a first end and a second end extending radially from said shifter and mounted within said housing for longitudinal movement, said first end of said first elongated follower frictionally engaging said first graduated surface of said shifter and said second end of said first elongated follower rotatably engaging said first surface of said first graduated surface of said transmitter;
- a second elongated follower having a first end and a second end extending radially from said shifter and mounted within said housing for longitudinal movement, said first end of said second elongated follower frictionally engaging said second graduated surface of said shifter and said second end of said second elongated follower rotatably engaging said second graduated surface of said transmitter;
- whereby axial movement of said shifter provides simultaneous and opposing movement of said first and second followers to impart pivotal movement of the axis of rotation of said transmitter.
3 more elements
Dependencies are inferred from the claim text.