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Modular composite bicycle frame

  • US 5,456,481 A
  • Filed: 03/11/1994
  • Issued: 10/10/1995
  • Est. Priority Date: 04/07/1989
  • Status: Expired due to Fees
First Claim
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1. A bicycle frame assembly for securing a seat assembly, wheels, a crank assembly, a front fork assembly, and a handlebar, the bicycle frame assembly comprising:

  • (a) a separately-formed first body unit comprising a first outer shell with an inside surface and first internal ribs extending in a plurality of directions, said first internal ribs projecting inwardly from said inside surface of said first outer shell to form a first support structure, said first body unit including a first center section; and

    (b) a separately-formed second body unit comprising a second outer shell with an inside surface and second internal ribs extending in a plurality of directions, said second internal ribs projecting inwardly from said inside surface of said second outer shell to form a second support structure, said first and second body units being arranged and configured to mate together, said first outer shell being configured to mate along at least a portion of its perimeter with the perimeter of said second outer shell and at least a portion of said first internal ribs configured to mate with at least a portion of said second internal fibs;

    wherein the mated shells enclose said first and second internal ribs within the mated portions of said shells;

    wherein said second body unit includes a second center section and a chain stay extending rearwardly of said second center section.

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