Box beam bicycle type frame

Details Box beam bicycle type frame Box beam bicycle type frame

1990-03-08

1991-09-10

Crow, Stephen R.

Undertaking

A63B 2100

Patent

active

050467239

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 (1984-09-01), Gustafsson
patent: 3596921 (1971-08-01), Bruckl
patent: 3861715 (1975-01-01), Mendoza
patent: 4936570 (1990-06-01), Szymski

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