Drive mechanism for a reciprocating tool
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United States of America Patent
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Apr 2, 2013
Grant Date -
May 27, 2010
app pub date -
Jan 27, 2010
filing date -
Oct 23, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A drive apparatus for a reciprocating tool includes a plunger and a wobble plate interface operatively connected to a drive shaft assembly. The wobble plate interface includes a lower portion having an effective lower pivot connection, and an upper pivot connection to a rear portion of the plunger. The wobble plate interface is configured to reciprocate the plunger generally in its lengthwise direction during alternating cutting and return strokes. The distances between the upper and lower pivot connections of both the rocker and wobble plate interface together with the distance between the upper pivot connections thereof to the plunger define a four bar mechanism that produces a path of movement of an attached cutting blade that is effective to apply a progressive non-linear cutting force to a work piece during the cutting stroke.
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