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US 12,599,978 B2Granted
Reciprocating tool
AssigneeMilwaukee Electric Tool Corporation
InventorChristopher M. Didier
Life of this patent
Estimating the term…
Abstract
A power tool includes: a housing having a handle configured to be grasped by a user; a motor supported by the housing and defining a motor axis; a driving gear rotated by the motor about the motor axis; a driven gear defining a rotation axis that is parallel to the motor axis, the driven gear engaging the driving gear to be rotated by the driving gear about the rotation axis; a crankshaft coupled to and rotatable with the driven gear; a counterweight having a first yoke coupled to the driven gear to translate rotation of the driven gear into reciprocating motion of the counterweight; and a spindle having a second yoke coupled to the crankshaft to translate rotation of the driven gear into reciprocating motion of the spindle, wherein the counterweight and the spindle reciprocate opposite one another.
Claims23
A power tool comprising:
- a housing having a handle configured to be grasped by a user;
- a motor supported by the housing and defining a motor axis;
- a driving gear rotated by the motor about the motor axis;
- a driven gear defining a rotation axis that is parallel to the motor axis, the driven gear engaging the driving gear to be rotated by the driving gear about the rotation axis;
- a crankshaft coupled to and rotatable with the driven gear;
- a counterweight having a first yoke coupled to the driven gear to translate rotation of the driven gear into reciprocating motion of the counterweight;
- and
- a spindle having a second yoke coupled to the crankshaft to translate rotation of the driven gear into reciprocating motion of the spindle,
- wherein the counterweight and the spindle reciprocate opposite one another, and
- wherein the motor axis is positioned between the rotation axis and a distal end of the spindle that projects from the housing.
7 more elements
A power tool comprising:
- a housing having a handle configured to be grasped by a user;
- a motor supported by the housing;
- a driving gear rotated by the motor;
- a driven gear defining a rotation axis, the driven gear engaging the driving gear to be rotated by the driving gear about the rotation axis;
- a crankshaft coupled to and rotatable with the driven gear;
- a counterweight having a first yoke coupled to the driven gear to translate rotation of the driven gear into reciprocating motion of the counterweight, the counterweight defining a center of gravity;
- and
- a spindle having a second yoke coupled to the crankshaft to translate rotation of the driven gear into reciprocating motion of the spindle,
- wherein counterweight and the spindle reciprocate opposite one another, and
- wherein the center of gravity of the counterweight is positioned within a height of the spindle.
7 more elements
A power tool comprising:
- a housing;
- a motor supported by the housing;
- a driving gear rotated by the motor;
- a driven gear defining a rotation axis and including an eccentric shaft, the driven gear engaging the driving gear to be rotated by the driving gear about the rotation axis;
- a bearing movably supported on the eccentric shaft;
- a crankshaft coupled to eccentric shaft and rotatable with the driven gear;
- a grease passage at least partially defined through the crankshaft;
- a counterweight having a first yoke, the eccentric shaft extending through the first yoke such that rotation of the driven gear causes reciprocating motion of the counterweight, the bearing being positioned between eccentric shaft and the first yoke;
- and
- a spindle having a second yoke coupled to the crankshaft to translate rotation of the driven gear into reciprocating motion of the spindle,
- wherein the counterweight and the spindle reciprocate opposite one another, and
- wherein reciprocation of the spindle causes grease to move through the grease passage to lubricate the bearing.
9 more elements
A power tool comprising:
- a housing having a handle configured to be grasped by a user;
- a motor supported by the housing and defining a motor axis;
- a driving gear rotated by the motor about the motor axis;
- a driven gear defining a rotation axis that is parallel to the motor axis, the driven gear engaging the driving gear to be rotated by the driving gear about the rotation axis;
- a crankshaft coupled to and rotatable with the driven gear;
- a counterweight having a first yoke coupled to the driven gear to translate rotation of the driven gear into reciprocating motion of the counterweight;
- and
- a spindle having a second yoke coupled to the crankshaft to translate rotation of the driven gear into reciprocating motion of the spindle,
- wherein the counterweight and the spindle reciprocate opposite one another,
- wherein the spindle defines a reciprocation axis along which the spindle reciprocates, and
- wherein a center of gravity of the counterweight is positioned along the reciprocation axis.
8 more elements
A power tool comprising:
- a housing having a handle configured to be grasped by a user;
- a motor supported by the housing and defining a motor axis;
- a driving gear rotated by the motor about the motor axis;
- a driven gear defining a rotation axis that is parallel to the motor axis, the driven gear engaging the driving gear to be rotated by the driving gear about the rotation axis;
- a crankshaft coupled to and rotatable with the driven gear;
- a counterweight having a first yoke coupled to the driven gear to translate rotation of the driven gear into reciprocating motion of the counterweight;
- and
- a spindle having a second yoke coupled to the crankshaft to translate rotation of the driven gear into reciprocating motion of the spindle,
- wherein the counterweight and the spindle reciprocate opposite one another,
- wherein the spindle defines a reciprocation axis along which the spindle reciprocates, and
- wherein a center of gravity of the counterweight is vertically offset from the reciprocation axis and positioned within a height of the spindle.
8 more elements
A power tool comprising:
- a housing having a handle configured to be grasped by a user;
- a motor supported by the housing and defining a motor axis;
- a driving gear rotated by the motor about the motor axis;
- a driven gear defining a rotation axis that is parallel to the motor axis, the driven gear engaging the driving gear to be rotated by the driving gear about the rotation axis;
- a crankshaft coupled to and rotatable with the driven gear;
- a counterweight having a first yoke coupled to the driven gear to translate rotation of the driven gear into reciprocating motion of the counterweight;
- a spindle having a second yoke coupled to the crankshaft to translate rotation of the driven gear into reciprocating motion of the spindle,
- a gear case enclosing the driving gear, the driven gear, the crankshaft, and the counterweight;
- and
- a fastener extending inwardly from the gear case, the fastener configured to be received in an elongated aperture of the counterweight to guide reciprocation of the counterweight,
- wherein the counterweight and the spindle reciprocate opposite one another.
8 more elements
Dependencies are inferred from the claim text.