Land vehicles – Wheeled – Occupant propelled type
Patent
1997-10-16
1999-12-28
Mai, Lanna
Land vehicles
Wheeled
Occupant propelled type
2802811, B62M 102
Patent
active
060070846
ABSTRACT:
A front drive train bicycle has practically the parts of a simple bicycle. The major difference is in the location of the drive train. The front drive train bicycle has a steerer tube extension (38) where the bottom bracket shell. (22) is attached. A crankset consisting of a bottom bracket (21), a chainwheel (24), crank arm (52), and pedals (54) is attached to the bottom bracket shell (22). A rear wheel (32) with its gear or freewheel (28) is attached to the fork tips (42). A chain (26) connects the chainwheel (24) to the rear wheel gear or freewheel (28). A front wheel (34) is attached to the rear dropouts (44). A down tube stay (30) is used instead of a chainstay (20). The front drive train bicycle has a shorter overall length because there is no bottom bracket between the two wheels and also because it uses relatively smaller wheels. It is also lighter in weight because of these. It requires less space for parking and storing away. It is easy to lift and carry around.
REFERENCES:
patent: 356095 (1887-01-01), Bouck
patent: 434605 (1890-08-01), Molin
patent: 1846224 (1932-02-01), Roberds
patent: 4618160 (1986-10-01), McElfresh
patent: 4773662 (1988-09-01), Phillips
patent: 5501478 (1996-03-01), Doan
patent: 5568935 (1996-10-01), Mason
Bicycle Maintenance and Repair, --1986 Rodale Press, Inc. p. 14.
The Bicycle Repair Book--1985. Rob Van Der Plas p. 41.
Lerner Avraham H.
Mai Lanna
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