Twist-grip shifter for bicycles and a bicycle having a twist-grip shifter

  • US 5,823,058 A
  • Filed: 03/04/1996
  • Issued: 10/20/1998
  • Est. Priority Date: 12/02/1994
  • Status: Expired due to Fees
First Claim
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1. A bicycle, said bicycle comprising:

  • a frame;

    at least two wheels, said at least two wheels comprising at least a front wheel and a rear wheel;

    said at least two wheels being disposed on said frame;

    an arrangement to propel at least one of said front wheel and said rear wheel;

    said arrangement to propel comprising;

    a chain;

    at least two sprockets to engage said chain; and

    at least two pedals, said at least two pedals being connected to one of said at least two sprockets;

    a seat, said seat being disposed on said frame;

    a handlebar for steering said bicycle; and

    a bicycle gearing system, said bicycle gearing system comprising;

    an arrangement to shift gearing associated with at least one of;

    said front wheel and said rear wheel of said bicycle;

    a shift actuator mounted on said handlebar, generally coaxially with said handlebar;

    at least one control cable having a first end and a second end;

    said first end of said at least one control cable being operatively associated with said shift actuator;

    said second end of said at least one control cable being operatively associated with said arrangement to shift gearing; and

    said shift actuator comprising;

    a first part being rotatable in a first direction and a second direction;

    said first part being operatively connected to said arrangement to shift gearing;

    said first part comprising a rotatable grip part;

    a second part, said second part comprising an arrangement to actuate said first end of said at least one control cable;

    a housing, at least a portion of said second part being disposed within said housing;

    a connecting arrangement to connect said first part and said second part to one another, and for rotating said first part and said second part along with one another; and

    said connecting arrangement comprising;

    at least two projections disposed on one of said first part and said second part;

    at least two recesses disposed in the other one of said first part and said second part; and

    said at least two projections being engaged with said at least two recesses, one of said at least two projections being configured to solely engage with only one of said at least two recesses.

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