Contiuously variable transmissions
OwnerForbes G. Perryinventor
Life of this patent
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Abstract
A continuously variable transmission in which a transmission unit provides a variable speed ratio between an input member (2) and an output member (3). The output member drives an output transmission member (11) by way of a power recirculation system (7-10) in a first regime of the transmission, through a selectable transmission path (30-34) providing a fixed ratio drive from the input member to the output transmission member, and having a selectable regime which provides a transmission path (19-23) from the output member to the output transmission member. The transmission is arranged so that only a clutching operation is required to effect a synchronous changeover between regimes.
Claims13
A continuously variable transmission comprising
- a variable transmission unit having an input member (2) and an output member (3);
- means for providing a variable speed ratio between said input member and said output member;
- an output transmission member (11);
- a power recirculation system (7-10) coupled between said input member and said output member of said variable transmission unit;
- a first selectable operating regime with a drive path (10, 24, 25) from said power recirculation system to said output transmission member;
- and
- a selectable fixed-ratio drive path (30-34) from said input member of the variable transmission unit to said output transmission member.
A continuously variable transmission comprising
- an output transmission member;
- a transmission unit having an input member (2), an output member (3) and a power recirculation system (7-10);
- means in said transmission unit for providing three selectable transmission paths including
- a first path coupling said output member to said output transmission member through said power recirculation system (7-10),
- a second path providing a fixed ratio drive from said input member to said output transmission member, and
- a third path coupling said output member to said output transmission member.
Dependencies are inferred from the claim text.