Title: Bicycle construction

Abstract: A bicycle construction for tandem operation includes an auxiliary drive means which may be attached to a conventional single operator bicycle between the main drive means and the rear wheel to permit operation by two occupants. The auxiliary drive means comprises a pair of first auxiliary sprockets each connected to an associated one of a pair of independently supported rotary pedals each of which is coupled to an associated fork of a forked rear wheel support. A pair of second auxiliary sprockets is mounted on the main drive means, each of the second auxiliary sprockets being coupled to a respective one of the main rotary pedals. A pair of support columns coupled to the bicycle frame may be provided to serve as an auxiliary seat support, at one end, and as an auxiliary rotary pedal support at its other end. The auxiliary crank arms associated with the auxiliary rotary pedals may be coupled to eccentrically mounted bearing for adjusting the spacing between the auxiliary drive means and the main drive means.

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Other info:

Inventors: Blow, Jr., James H. (Piscataway, NJ, US)

Application Number: 651211
Filing Date: 1976-01-21
Publication_date: 1977-06-14
Assignee:
Primary Class(es): 280/7.16 280/231
Other Classes:
US Patent Ref:

516435	Mar, 1894	Hasbrouck	280/7.
599859	Mar, 1898	McFadden	280/7.
2227799	Jan, 1941	Sizelove	280/7.
2277727	Mar, 1942	Swanson	280/231.
2385892	Oct, 1945	Swanson	280/231.
2723132	Nov, 1955	Oberwegner	280/231.
3913944	Oct, 1975	Blo, Jr.	280/231.

Other Refs:
Primary Examiner: Song, Robert R.
Assistant Examiner:
Attorney: Woldman; Jesse