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Continuously variable transmission

  • US 7,959,533 B2
  • Filed: 10/03/2006
  • Issued: 06/14/2011
  • Est. Priority Date: 12/09/2005
  • Status: Active Grant
First Claim
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1. A continuously variable transmission (CVT) comprising:

  • a first traction ring;

    a second traction ring;

    a plurality of power rollers interposed between and in contact with the first and second traction rings, wherein the power rollers are configured to spin about a tiltable axis;

    first and second torsion springs, wherein the first and second traction rings each include a recess adapted to receive and partially house the first and the second torsion springs, respectively;

    a first roller cage having a circumferential extension, said extension having a slit for receiving the first torsion spring, said extension adapted to cooperate with the first traction ring for substantially housing the first torsion spring in the first traction ring; and

    a second roller cage having a circumferential extension, said extension having a slit for receiving the second torsion spring, said extension adapted to cooperate with the second traction ring for substantially housing the second torsion spring in the second traction ring.

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