Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including belt shiftable axially from one to another surface...
Reexamination Certificate
2006-04-11
2006-04-11
Charles, Marcus (Department: 3682)
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
Including belt shiftable axially from one to another surface...
C474S082000
Reexamination Certificate
active
07025698
ABSTRACT:
A front derailleur including an annular chain guide for engagement and disengagement of a bicycle chain with multiple chain rings of a crankset. The annular chain guide may be positioned by linear guide rods. The annular chain guide may have an inner lifting surface and an outer pulling surface for engaging diametrically opposed corners of a chain when viewed in cross-section. The annular chain guide may have an opening defined by a polygon having at least five sides. The motion of the annular chain guide during a up-shift, i.e., displacement of the chain from a smaller chain ring to a next larger chain ring includes an upward, outward and rearward linear motion relative to a bicycle frame including upward force exerted by the annular chain guide against the chain. The motion of the annular chain guide during a down-shift is exactly opposite whereby the annular chain guide exerts a pulling down force against the chain.
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Charles Marcus
Morriss O'Bryant Compagni
LandOfFree
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