Robert Boschgmbh

Robert Bosch Tool Corporation

S-B Power Tool Company

Credo Technology Corporation

Nanjing Chervon Industry Co., Ltd.

Nanjing Chervon Indusrty Co., Ltd.

Robert S Doumani

Timothy Szweda

Eric R Laliberte

Brian Taylor

Mark S Talesky

Brady J Groth

Jaime Moreno

Brian Hyuk Joon Chung

Amit K Mehta

Paul D Hatch

James Dangora

Jan S Koegel

Eric Hendrickson

Jason Feldner

Engin Hassamanci

Ronald Arvey

Brian H Chung

Dennis Powell

Craig Wilson

Tom Bajek

Venu Samprathi

A power tool assembly includes an arbor shaft configured to support a shaping device, a belt operably connected to the arbor shaft and configured to rotate the arbor shaft, a motor including a power shaft operably connected to the belt through a motor end pulley, and a positioning device operably connected to the motor, the positioning device configured to rotate the motor about a motor mounting axis of rotation which is offset from an axis of rotation of the motor end pulley, thereby modifying a tension of the belt.

Power tool with improved belt tensioning

In one embodiment, a table saw assembly includes a motor assembly, an electrically conductive belt operably connected to the motor assembly, an arbor shaft operably connected to the belt, a drop arm assembly rotatably supporting the arbor shaft, a first pulley rotatably supporting the belt, the first pulley including an inner component defining an inner bore and an outer component defining an outer surface, the first pulley configured to electrically isolate the inner bore from the outer surface, and an alignment adjustment mechanism operably connected to the first pulley, the alignment adjustment mechanism configured to selectably position the first pulley along an axis of rotation of the first pulley.

Table saw with pulley alignment mechanism

In one embodiment, a table saw assembly includes a motor assembly, an electrically conductive belt operably connected to the motor assembly, an arbor shaft operably connected to the belt, a drop arm assembly rotatably supporting the arbor shaft, and a first pulley rotatably supporting the belt, the first pulley including an inner bore and an outer surface, the first pulley configured to electrically isolate the inner bore from the outer surface.

Table saw with electrically isolated arbor shaft

A method of mounting a capacitive coupling plate to a power tool assembly including a drop arm assembly, an actuating device configured to transfer a force to the drop arm assembly, and a control system configured to control the actuating device includes connecting a capacitive coupling plate bracket formed from a non-conductive material to a drop arm frame of the drop arm assembly, and mounting the capacitive coupling plate to the capacitive coupling plate bracket.

Method of operating a power tool with a protected coupling plate

A power tool assembly includes a drop arm assembly rotatably supporting an arbor shaft and movable between a first drop arm position and a second drop arm position, an actuating device configured to transfer a force to the drop arm assembly when the drop arm assembly is at the first drop arm assembly position, a control system configured to control the actuating device to transfer the force to the drop arm assembly when an unsafe condition is sensed, a motor operably connected to the arbor shaft through a gear, and a gear housing which houses the gear, the gear housing formed from a non-conductive material.

Power tool motor with reduced electrical noise

A method of resetting a drop arm assembly in a power tool assembly from a first drop arm assembly position whereat a portion of a shaping device mounted on the drop arm assembly does not extend above a workpiece support surface, includes removing a throat plate from a throat plate opening, moving at least a portion of a blade wrench downwardly through the throat plate opening, operably coupling the blade wrench with an arbor shaft of a drop arm assembly, releasing a first latch from engagement with a drop arm frame of the drop arm assembly after removing the throat plate, pulling the coupled blade wrench in an upwardly direction to a second drop arm assembly position whereat the portion of the shaping device extends above a workpiece support surface, and latching the drop arm assembly at the second drop arm assembly position with a second latch.

Drop arm reset method

In accordance with one embodiment, a reciprocating saw includes a housing, a plunger at least partially positioned within the housing and configured to reciprocate with respect to the housing along a plunger axis, a wobble plate assembly operably connected to the plunger and a motor, a first guide rail supported by the housing and extending longitudinally along the plunger axis, and a spherical component in contact with the first guide rail, the spherical component and the first guide rail configured to inhibit rotation of the wobble plate assembly.

Reciprocating tool with linear guides

A power tool assembly includes a drop arm frame with an opening configured to rotatably support an arbor shaft, a lower surface spaced apart from the opening, and a plurality of ribs extending between the lower surface and the opening. The plurality of ribs define a respective one of a plurality of axes, the plurality of axes intersect at a locus, and the locus is adjacent to, but spaced apart from, a center of gravity of the drop arm assembly. The power tool assembly further includes an actuating device configured to transfer a force to the drop arm assembly when the drop arm assembly is at the first drop arm assembly position, and a control system configured to control the actuating device to transfer the force to the drop arm assembly when an unsafe condition is sensed.

Power tool drop arm with offset ribbing

In accordance with one embodiment, a reciprocating saw includes a housing, a spindle shaft configured to reciprocate within the housing, the spindle shaft including a plurality of first grooves extending along an axis of the spindle shaft, a locking bushing including an internal bore, the locking bushing supported by the housing such that the plurality of first grooves is at least partially located within the internal bore, the locking bushing including a plurality of axially extending grooves within the internal bore, each of the plurality of axially extending grooves aligned with a respective one of the plurality of first grooves, and a plurality of first ball bearings, each of the plurality of first ball bearings positioned at least partially within a respective one of the plurality of axially extending grooves and the aligned respective one of the plurality of first grooves.

Reciprocating tool with linear ball rails

A power tool assembly includes a latch movable between a first latch position whereat the latch supports a drop arm assembly in a first drop arm assembly position, and a second latch position whereat the latch does not support the drop arm assembly position at the first drop arm assembly position, and an arbor lock movable between a first lock position whereat the arbor lock prevents movement of the drop arm assembly toward the second drop arm assembly position when the drop arm assembly is in the first drop arm assembly position, and a second lock position whereat the arbor lock does not prevent movement of the drop arm assembly toward the second drop arm assembly position when the drop arm assembly is in the first drop arm assembly position.

Power tool with arbor lock

A power tool assembly includes a drop arm assembly movable along a drop path between a first drop arm assembly position whereat a shaping device portion supported by the drop arm assembly extends above a workpiece support surface and a second drop arm assembly position whereat the portion does not extend above the workpiece support surface, the drop arm assembly including a capacitive coupling plate bracket formed from a non-conductive material and connected to a drop arm frame, and a capacitive coupling plate mounted to the capacitive coupling plate bracket, an actuating device configured to transfer a force to the drop arm assembly when the drop arm assembly is at the first drop arm assembly position, and a control system operably connected to the capacitive coupling plate and configured to control the actuating device to transfer the force to the drop arm assembly when an unsafe condition is sensed.

Power tool with protected coupling plate

A power tool assembly includes a drop arm assembly including a drop arm frame and an arbor shaft configured to support a shaping device at least partially above a workpiece support surface, the drop arm assembly configured to move within a drop plane to drop the shaping device completely beneath the workpiece support surface, a belt operably connected to the arbor shaft and configured to rotate the arbor shaft through a slave pulley, the slave pulley having a slave pulley axis of rotation, a motor including a power shaft operably connected to the belt through a motor end pulley, the motor end pulley having a motor end pulley axis of rotation, and an orbit bracket configured to orbitally support the drop arm assembly, the orbit bracket defining a drop arm orbit axis located between the motor end pulley axis of rotation and the slave pulley axis of rotation.

Power tool with drop arm orbit bracket

Table saw

A power equipment in one embodiment includes a swing arm assembly movable along a swing arm path between a first swing arm position adjacent a latch hold mechanism and a second swing arm position spaced apart from the latch hold mechanism, a shroud portion mounted on the swing arm assembly and configured to partially enclose a shaping device when the shaping device is mounted on the swing arm assembly, and a hose system configured such that when a hose system inlet plenum is aligned with a shroud portion outlet plenum, dust from the shroud portion outlet plenum is passed to the hose system inlet plenum and the hose system inlet plenum does not interfere with movement of the swing arm assembly along the swing arm path.

Blade drop power tool with dust management

A table saw in one embodiment a swing arm movable along a swing arm path between a first swing arm position adjacent a latch hold mechanism and a second swing arm position spaced apart from the latch hold mechanism, a blade supported by the swing arm, a charge coupling plate mounted in close proximity to the blade so as to form a capacitor, an actuating device configured to transfer a force to the swing arm when the swing arm is maintained at the first swing arm position resulting in a bias on the latch hold mechanism, and a control system configured to control the actuating device to transfer the force to the swing arm in response to a sensed change in capacitance of the capacitor.

Growing community of inventors

Hoffman Estates, IL, United States of America

Robert S Doumani