Airfoil shape for bicycle

Details Airfoil shape for bicycle Airfoil shape for bicycle

2011-04-26

2011-04-26

Winner, Tony H. (Department: 3611)

Land vehicles

Wheeled

Occupant propelled type

C224S427000

Reexamination Certificate

active

07931289

ABSTRACT:
The bicycle may have a frame and a seat post. A cross section of the seat post may have an airfoil shape wherein a leading surface is sharper (i.e. less round) compared to prior art airfoil shaped bicycle frames. Additionally, a maximum thickness of the airfoil shape may be located more rearward compared to prior art airfoil shaped bicycle frames and bicycle front forks. This configuration may provide for a reduction in drag. A battery pack may be mounted to a rear side of the seat post.

REFERENCES:
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patent: 4982975 (1991-01-01), Trimble
patent: 5221102 (1993-06-01), Spangler
patent: 5426570 (1995-06-01), Davis
patent: 6889992 (2005-05-01), Vroomen et al.
patent: 7147237 (2006-12-01), Cobb
patent: 7654550 (2010-02-01), Chuang
patent: 2008/0251555 (2008-10-01), Andrews
patent: 2010/0225090 (2010-09-01), Cusack et al.
Dreese, John; “The Dreese Airfoil Primer”; Parts 1-5.
“NACA Air Foil”; Wikipedia article; http://en.wikipedia.org/wiki/NACA—airfoil.

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