Bicycle frame

Details Bicycle frame Bicycle frame

1991-06-11

1993-04-13

Focarino, Margaret A.

Land vehicles

Wheeled

Occupant propelled type

280274, B62K 1900

Patent

active

052015378

ABSTRACT:
An improved form of bicycle frame comprising a down tube attached to a seat tube at their lower ends and a back top tube affixed between the down tube and seat tube to form a first large triangle similar to a conventional bicycle frame. The upper end of the down tube is connected to a head tube, as is an upper end of a front top tube. A lower end of the front top tube is connected intermediate the ends of the back top tube thereby forming a small triangle between a portion of the down tube, a portion of the back top tube, and the front top tube. This smaller triangle functions as a gusset to provide a new frame configuration and to increase the strength thereof as well as increase the crotch clearance of the frame.

REFERENCES:
patent: D143572 (1946-01-01), Bruce
patent: 642493 (1900-01-01), Rosenberg
patent: 694567 (1902-03-01), Moore
patent: 1220938 (1917-03-01), Blanchard
patent: 2550941 (1951-05-01), Schuricht
patent: 4813696 (1989-03-01), Moulton
patent: 4921267 (1990-05-01), Kirk

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