US 11,052,476 B2
Reciprocating saw
Joshua Adams, Milwaukee, WI (US); Ryan J. Denissen, Sussex, WI (US); and Carmen J. Castanos, Milwaukee, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Sep. 19, 2019, as Appl. No. 16/576,105.
Application 16/576,105 is a continuation in part of application No. 16/422,189, filed on May 24, 2019, granted, now 10,875,110.
Application 16/422,189 is a continuation of application No. 15/723,815, filed on Oct. 3, 2017, granted, now 10,300,541, issued on May 28, 2019.
Application 15/723,815 is a continuation of application No. 14/296,892, filed on Jun. 5, 2014, granted, now 9,776,263, issued on Oct. 3, 2017.
Application 14/296,892 is a continuation in part of application No. 12/842,209, filed on Jul. 23, 2010, granted, now 9,579,735, issued on Feb. 28, 2017.
Claims priority of provisional application 61/831,968, filed on Jun. 6, 2013.
Prior Publication US 2020/0009668 A1, Jan. 9, 2020
Int. Cl. B23D 51/16 (2006.01); B23D 49/16 (2006.01); B23D 49/10 (2006.01)
CPC B23D 51/16 (2013.01) [B23D 49/10 (2013.01); B23D 49/162 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A reciprocating saw comprising:
a housing;
a motor positioned within the housing and configured to operate in a forward mode and in a reverse mode, the forward mode corresponding to rotation of the motor in a first rotational direction, and the reverse mode corresponding to rotation of the motor in a second rotational direction opposite the first rotational direction;
a drive mechanism positioned within the housing and coupled to the motor, the drive mechanism including
a driven gear that is rotated by the motor, the driven gear being vertically-oriented within the housing and having an upper portion and a lower portion,
a connecting rod coupled to the driven gear to translate rotary motion of the driven gear into reciprocating motion,
an output shaft coupled to the connecting rod to reciprocate relative to the housing through a cutting stroke and a return stroke, the output shaft configured to support a tool element, and
a counterweight coupled to the driven gear and rotating with the driven gear;
wherein when the motor is operated in the forward mode, the counterweight moves in a first direction through the upper portion of the driven gear during the cutting stroke of the output shaft to drive the tool element into a workpiece during a start of the cutting stroke, and moves through the lower portion of the driven gear during the return stroke of the output shaft, and
wherein when the motor is operated in the reverse mode, the counterweight moves in a second direction opposite the first direction through the lower portion of the driven gear during the cutting stroke of the output shaft to move the tool element away from the workpiece during the start of the cutting stroke, and moves through the upper portion of the driven gear during the return stroke of the output shaft.