Box beam bicycle type frame

Details Box beam bicycle type frame Box beam bicycle type frame

1985-12-30

1990-06-26

Crow, Stephen R.

Undertaking

A63B 2100

Patent

active

049365703

ABSTRACT:
Frame for a bicycle type apparatus such as a bicycle type exerciser or a bicycle, having a closed, rectangular box beam cross section reach tube oriented with the major axis of the cross section in a vertical plane secured between a handlebar head tube and a seat mast. The reach tube has an angular configuration including a rear horizontal section extending along the chain guard, and an upwardly and forwardly extending diagonal section.

REFERENCES:
patent: D243165 (1977-01-01), Wheeler
patent: D275589 (1984-08-01), Gustafsson
patent: 3596921 (1971-08-01), Bruckl
patent: 3809402 (1974-05-01), Haines et al.
patent: 3861715 (1975-01-01), Mendoza
patent: 4298893 (1981-11-01), Holmes
Mark's Handbook for Mechanical Engineers, McGraw Hill, 8th Edition, pp. 5-30, 5-31, 5-32.

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