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Sprocket shift assembly

  • US 4,127,038 A
  • Filed: 08/06/1976
  • Issued: 11/28/1978
  • Est. Priority Date: 08/06/1976
  • Status: Expired due to Term
First Claim
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1. A sprocket shift assembly comprisinga driving hinge;

  • a pair of sprocket sectors, each having at least one partial sprocket thereon lying in a first plane;

    another sprocket, lying in a second plane parallel to the first plane, and having a pitch diameter that is different from the pitch diameter of the full sprocket formed by the partial sprockets;

    means mounting at least one of said sprocket sectors to be movable with respect to said driving hinge such that the partial sprockets of the sprocket sectors can lie in one plane at the same time to form a full sprocket when the sprocket sectors are in predetermined meshed position relative to the driving hinge, and such that each movable mounted sprocket sector can be moved to place some partial sprocket teeth thereof in a second plane; and

    means coupling the sprocket sectors to the driving hinge for rotation therewith.

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