Michael S Baker
Land Surveyors in Provo, UT

6354971, Mar 12, 2002

Feb 2, 2000

09/496555

Larry L. Howell - Orem UT
Michael Sean Baker - Provo UT
Aaron Lyle Herring - Provo UT
Christian Dennis Lott - Provo UT

Brigham Young University - Provo UT

B62M 912

474 82

A derailleur, and more particularly, to a bicycle derailleur device that is compliant and self returning. There is a derailleur for moving a chain from one location to another while maintaining parallel alignment to a set of gears that mounted to a cycle. Specifically, the derailleur has a first and second rigid segments, parallel to each other, where the first segment means is fixed to the cycle and the second segment means is free to traverse from a first to a second position. In addition there is a first linking means, coupled between the first and second segments, for linking the first and second rigid segments together, and designed to move from the first position to the second position. Moreover, there is a second linking means, coupled between the first and second segments and spaced from the first linking means in about a parallel position, for linking the first and second rigid segments together, and designed for resiliently biasing the derailleur into the first position and for resiliently bending into the second position. Wherein the first linking means being shorter than the second linking means.