Land vehicles – Wheeled – Occupant propelled type
Patent
1994-07-11
1996-11-26
Culbreth, Eric D.
Land vehicles
Wheeled
Occupant propelled type
280238, B62M 102
Patent
active
055777490
ABSTRACT:
A twin gear drive assembly for a bicycle comprising a front gear assembly with a plurality of gears for driving the rear gear; for driving the frontal wheel with an associated front derailleur; an intermediate gear with a shaft coupled to the front gear for concurrent rotation; a drive gear or the frame beneath the front gear assembly with pedals for the rotation thereof with a chain retainer for the drive gear; a lower gear with a larger number of teeth located beneath the drive gear of the second assembly with an associated chain coupling the upper and lower gears of the supplemental gear assembly and pebbles secured to the lower gear of the second assembly for rotating the lower gear directly, the upper gear through the second chain and the first driven gear through the axle therebetween; first control means for controlling the derailleur of the first gear assembly and a second control assembly for controlling the chain in its position with regard to the gears of the second assembly at the discretion of the operator.
REFERENCES:
patent: D270048 (1983-08-01), Bytheway
patent: 559299 (1896-04-01), Matthern
patent: 789580 (1905-05-01), Trainor
patent: 846033 (1907-03-01), Kidney
patent: 1154292 (1915-09-01), Cribbs
patent: 4576587 (1986-03-01), Nagano
patent: 4586914 (1986-05-01), Nagano
patent: 5085620 (1992-02-01), Nagano
patent: 5133695 (1992-07-01), Kobayashi
patent: 5158314 (1992-10-01), Farras Pinos
Culbreth Eric D.
Zeender F.
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