Black Decker Inc.

Tim Heimrich

David J Smith

Jarrett A Dunston

Manfred Droste

Michael R Marjomaa

Tobias Heep

John B Fogle

Benjamin Schramm

Dustin Jefferies

Kevin L Pulley

Rene Thieme

Dustin Jeffries

Marek Turisin

Petr Dusik

Vincent Wensheng Zou

Daniel Bernhart

Dieter Schmidtfrerick

Rene Gumpert

Joerg Roth

Daniel Kadlecek

Robert Miebach

Thomas Heilig

Pablo Garcia Ramiro

Jörg Roth

A handheld pole sander is provided including an elongate body having two ends, the elongate body including a first pole and a second pole made partially of electrically conductive material and capable of sliding in and out of each other in a telescopic manner the first pole and second pole are made from electrically conductive material. An electric motor electrically controlled by control electronics is provided, and a sanding head is attached via a pivot mechanism to a first end of the elongate body. At least one seal is located between overlapping parts of the first pole and second pole. The seal includes an electrically conductive material and provides an electrical connection between the first pole and second pole. Alternatively, at least one electrical contact is provided between the first pole and second pole to provide an electrical connection between the first pole and second pole.

Pole sander

A brushless direct-current motor is provided includes an inner stator and an outer rotor. The rotor includes a rotor core disposed around the stator, an inner annular member mounted on a rotor shaft, and a plurality of radial blades extending angularly from the rotor core to the inner annular member forming a fan. A first end cap is provided including a radial back plate proximate the fan and a center opening in the radial back plate through which the rotor shaft extends. A second end cap is provided including a main body disposed adjacent the stator opposite the fan. The radial back plate of the first end cap includes at least one sloped surface forming at least one air gap such that the airflow generated by the fan is centrifugally guided within the first end cap by the sloped surface and caused to exit through the air gap.

Outer rotor brushless motor having an axial fan

A handheld pole sander is provided including an elongate body having two ends, an electric motor electrically controlled by control electronics, and a sanding head attached via a pivot mechanism to a first end of the elongate body. The sanding head includes a hood and an output spindle projecting from the hood and rotatably driven by the electric motor. At least part of the elongate body includes a heat conductive part being at least partially made of heat conductive material. The control electronics are mounted on the elongate body adjacent to or in direct contact with the heat conductive part of the elongate body.

A brushless direct-current motor is provided includes an inner stator and an outer rotor. A rotor shaft extends through a stator core of the inner stator. A first end cap includes a radial back plate disposed on a first side of the stator and a front center opening through which the rotor shaft is supported via a front bearing. A second end cap includes an inner annular body extending axially inwardly and forming a rear center opening, an outer annular body, and a main body extending on a second side of the stator. The inner annular body includes a first portion that extends at least partially into an opening of the stator core and supports the rotor shaft via a rear bearing, and a second portion rearward of the first portion that received a rear end of the rotor shaft therein and houses a sensor board therein.

Outer rotor brushless motor stator mount

A power tool comprising: a conductive tube; a rear unit located at a rear end of the tube; a front unit located at a front end of the tube; a battery interface comprising a plurality of terminals, wherein the battery interface is located in the rear unit; a motor located in the front unit; at least one power line for supplying power from the rear unit to the front unit, wherein at least a portion of the power line is located within the tube; and an electromagnetic interference (EMI) suppressor for suppressing EMI from the at least one power line, the EMI suppressor comprising an electrical component electrically connecting the tube to a first terminal of the plurality of terminals.

Electromagnetic interference suppression

A hammer drill is provided including a motor, an electrical power circuit arranged to provide power to the motor, a tool holder arranged to hold a cutting tool, and a drive transmission operable in at least two modes of operation. A mode change mechanism is provided to switch the drive transmission between the at least two modes of operation, and at least one electrical switch is located within the electrical power circuit to provide power to the motor. Hammer drill further includes lock-on mechanism is configured to lock the at least one switch in the closed state when it is activated, a controller configured to control an operation of the motor, and an electrical power circuit configured to provide power to controller. The motor is prevented from operating when no power is provided to the controller.

Hammer drill

A power tool comprises a housing and an electric motor disposed in the housing. A rotary output is driven by the motor. Electronic sensor configured to sense operating parameters of the power tool includes a voltage sensor arranged to detect the voltage across the electric motor, a current sensor arranged to detect the current through the tool, and a speed sensor arranged to detect the angular velocity &#x3c9; of the output spindle. Electronic control apparatus is configured to determine from the operating parameter output signals the torque M of the rotary output and control the angular velocity of the rotary output in response to the calculation of the torque of said rotary output.

Power tool

Growing community of inventors

Bad Camberg, Germany

Tim Heimrich