Title:
EPOCH-MAKING GEAR CRANK FOR BICYCLE
Document Type and Number:
Japanese Patent JPH06239284
Kind Code:
A
Abstract:
PURPOSE: To ensure the proper achievement of such a revolutionary and very large increase in driving force as two or three times of a conventional value, exactly at the same travel speed as in a conventional case.
CONSTITUTION: Upper corner gears 6 and 3T are formed on the left upper end corner of an oblong base plate 5 integrated with the crankshaft 4 of a conventional rear crank 3. Also, the same number of under corner gears 7 and 3T are formed on the opposite right end lower corner of the plate 5. In addition, the upper corner gear 6 and under corner gear 7 at both ends of the plate 5 are connected to the free wheel 13 of a rear wheel via a chain 10.
More Like This:
| JP2019515832 | Locking device for vehicles with pedals |
| JP2003183889 | COATED PART |
| WO/2012/009571 | BICYCLE TRANSMISSION |
Inventors:
TAMURA KIICHI
Application Number:
JP6589593A
Publication Date:
August 30, 1994
Filing Date:
February 16, 1993
Export Citation:
Assignee:
TAMURA SENNOSUKE
International Classes:
B62M3/00; B62M9/00; (IPC1-7): B62M9/00; B62M3/00