Land vehicles – Wheeled – Occupant propelled type
Reissue Patent
1999-09-21
2008-03-04
Morris, Lesley D. (Department: 3611)
Land vehicles
Wheeled
Occupant propelled type
C074S594100
Reissue Patent
active
RE040127
ABSTRACT:
A human powered drive units each including a pair of a rotatable member having a sprocket and a supporting member having a sprocket, which are arranged up and down, and including a chain extended around the rotatable member and the supporting member, are disposed at left and right sides, respectively. The left and right rotatable members1, 100are fixed on a driving shaft15.A chain ring6on which the load is applied is mounted on the driving shaft between upper rotatable member1and rotatable member100.In each of the units, constraining means including a free crank (10for the right-hand unit, and1000for the left-hand unit) and arm (11for the right-hand unit, and1100for the left-hand unit), is provided so as to maintain perpendicularity of a shaft of the pedal relative to the plane in which the chain moves. By the rider kicking the pedal along the closed orbit including a linear orbit portion, the force transmitted to the pedal from the foot of the rider is efficiently converted to a rotational force in a longer period of time, thus increasing the power input.
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Franklin Eric J.
Morris Lesley D.
Scharich Marc A.
Venable LLP
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