Machine element or mechanism – Gearing – Adjustable
Reexamination Certificate
2004-07-28
2008-08-19
Lewis, Tisha D (Department: 3681)
Machine element or mechanism
Gearing
Adjustable
C464S161000
Reexamination Certificate
active
07412909
ABSTRACT:
The invention provides a non-stage transmission which shifts gear in response to a load without requiring any independent actuator for changing a change gear ratio, and can achieve a large change gear ratio on the basis of a small-sized and low-cost structure.The non-stage transmission is structured such that a rocker arm4is reciprocated via a connection rod18, a means for changing a stroke of the reciprocating motion is provided, and an output shaft2is driven in one direction whichever of forward and backward directions of the reciprocating motion of the rocker arm4. An input side turning body13is structured such as to drive an output side turning body14via an energizing spring12. The stroke of the reciprocating motion is changed by rotating a crank shaft lever by a cam groove13din a clockwise direction in correspondence to an increase of a load so as to shorten a distance between points Q, S. A torque and a rotational number of the output shaft are changed on the basis of a change of the stroke.
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Lewis Tisha D
Myers Jeffrey D.
Peacock & Myers, P.C.
Updegraff Samantha A.
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