Robert Boschgmbh

Robert Bosch Tool Corporation

Jan S Koegel

Ulli Hoffmann

Robert S Doumani

Ralph Dammertz

Brian Taylor

Thilo Koeder

Joachim Platzer

Hans Kaiser

Marcel Casota

Eric Hendrickson

Mark S Talesky

Timothy Szweda

Florian Bantle

Uwe Striggow

Csaba Kreiter

Brian H Chung

Gregory Chaganos

Venu Samprathi

Michael Luginbill

Marin Assaliyski

Daniel Winternitz

Juergen Wiker

Martin Assaliyski

Ji Yao

Eric B Hendrickson

An improvement for a power tool having a motor-driven working tool for performing an operation on a workpiece includes a material sensor positioned to sense the workpiece prior to operation by the working tool. The material sensor is configured to determine a material property of the workpiece and to generate a signal in response thereto. A processor coupled between the material sensor and the motor is configured to control the motor in response to the signal generated by the material sensor.

Workpiece material detector for a power tool

An extension is configured to be removably coupled to a base of a bench top power tool or work bench by a connection such that an upper surface of the extension is coplanar with a work surface of the bench top power tool or work bench. The extension is configured to be movably coupled to the base to support workpieces of varying shape and size that do not fit easily on the work surface.

Universal extension for work surfaces of bench top power tools and work benches

A support frame for a power tool includes a top configured to support a table top and a bottom arranged opposite and parallel to the top. The bottom is configured to support the support frame on a surface when the support frame is in a first position. The support frame further includes a side arranged between the top and the bottom and configured to support the support frame on the surface when the support frame is in a second position. When the support frame is in the first position and the second position, the table top is spaced apart from the surface.

Support frame for benchtop power tool

An airflow management system for a table saw includes an elongated hollow member and a dust cap. The elongated hollow member includes a first prong and a second prong, the first and second prongs being configured to be positioned adjacent a saw blade on opposite sides of a saw blade plane in which the saw blade is positioned. The first and second prongs define an opening and a partially enclosed space, in which an airflow channel is defined, therebetween. The dust cap is attached to the elongated hollow member and includes a hose connection fluidly connected to the airflow channel of the elongated hollow member and configured to connect to a vacuum source to pull air from the airflow channel through the hose connection.

Airflow and illumination system for a table saw

A table saw includes a lower guard assembly, a first airflow fan, a motor, and a drivetrain system. The lower guard assembly has a dust exhaust chute and is configured to at least partially enclose a lower portion of a saw blade. The first airflow fan is positioned in the lower guard assembly and is configured to produce a first airflow directed through the lower guard assembly toward the dust exhaust chute. The motor is configured to rotationally drive an output shaft, and the drivetrain system connects the output shaft to the first airflow fan and the saw blade to enable the motor to rotationally drive the first airflow fan and the saw blade simultaneously.

Airflow management system for a power tool

A power table saw has a saw blade driven by a motor with power selectively supplied to the motor by actuation of a switch. A riving knife is selectively positioned in an extended position and a retracted position relative to the blade. A blade guard is removably mounted to the riving knife above the blade. A sensible element on the riving knife can be detected by a first sensor when the riving knife is retracted, the first sensor has a non-null state when the sensible element is adjacent the first sensor and a null state otherwise. A second sensor has a null state when the blade guard is detected and a non-null state otherwise. A controller determines the states of the sensors and disengages power to the motor when the switch is actuated when the states of the sensors are different.

Guard detection system for a power tool

A table saw includes a safety system to protect a user from injury. The safety system detects a sensed condition and rapidly moves a saw blade away from the user. The safety system includes a dual ratchet mechanism to prevent the blade from rebounding back above a work surface after an initial rapid retraction of the blade. The table saw has a swing arm that rotates to move the blade below the work surface. A first ratchet engages a first contact surface of the swing arm after rotation of the swing arm over a first range of angular displacements to prevent counter rotation of the swing arm. A second ratchet engages a second contact surface of the swing arm after rotation of the swing arm over a second range of angular displacements to prevent counter rotation of the swing arm.

Ratchet and release mechanism for swing arm of table saw

Improvements to a table saw include a system for automatically adjusting the height of the cutting blade in relation to the height of the workpiece, a system for providing fine adjustment of the height or bevel angle of the saw blade or work surface, and a system for automatic speed control and shut-off for the saw blade.

Adjustment and control features for a power tool

A power tool arrangement includes a frame having an outlet. A power tool is coupled to the frame and includes a movable working element configured to engage a work piece. A hose includes first and second opposite ends and a biasing device configured to bias the hose into a longitudinally compressed position. The first end is coupled to the outlet. The second end is coupled to the working element such that the second end follows the movement of the working element and the hose thereby moves between the longitudinally compressed position and a longitudinally expanded position.

Power tool arrangement with a spring loaded hose

For a machine tool designed in particular as a saber saw, a configuration including a carrying frame is provided, via which the lifting rod and the support element are joined to form a unit that can be rotated about the longitudinal axis of the power tool, is mounted on the casing side, and guides a drive part of the lift drive on the lifting rod side.

Motor-driven machine tool

A table tool includes a table which carries a power tool. The table includes table base and a table top. The table top includes a central table top portion fixed to the table base. The central table top portion of the table top includes a left perimeter, a right perimeter, and a rear perimeter. A first table top extension is configured to be selectively coupled to the table on the left perimeter, and the right perimeter of the central table top portion with the first table top extension slideable relative to the central table top portion. A second table top extension is configured to be selectively coupled to the left perimeter, the right perimeter, and the rear perimeter of the central table top portion with the second table top extension fixed relative to the central table top portion.

Modular table system for table saws

A table saw includes a workpiece support surface and a laser apparatus. The workpiece support surface defines a blade opening through which a cutting blade is configured to extend. The laser apparatus is configured to emit a laser light away from the workpiece support surface.

Optical alignment device for a table saw

A power tool includes a table structure having a work surface and a motor assembly having an output drive positioned under the work surface. The motor assembly is adjustable relative to the work surface between a first position that is close to the work surface and a second position that is further from the work surface. A fan member is coupled to the motor assembly to generate an airflow. A blade case is positioned under the work surface including a first sidewall and an opposing second sidewall, and an air guide configured to channel the airflow into the blade case through an opening in the first sidewall. The air guide is further configured to move with the motor assembly between the first position and the second position. The air guide covers the opening in both the first position and the second position.

Table saw having airflow apparatus

A handheld jigsaw, such as a compass saw (), is disclosed that comprises a housing () and a lifting rod () having a pendulum mechanism (). The pendulum mechanism includes a pendulum lever () with which a pendulum stroke can be given during sawing to a saw blade () carried by the lifting rod (). The lifting rod () is arranged such that it can rotate about its own axis () thereof and pivot transversely to the axis (), and wherein the pendulum mechanism () can rotate about the axis ().

Hand-held power jigsaw

A table saw includes a workpiece support surface and a laser apparatus. The workpiece support surface defines a blade opening through which a cutting blade is configured to extend. The laser apparatus is configured to emit a laser light away from the workpiece support surface. A laser support element having an upper portion above the workpiece support surface and a lower portion below the workpiece support surface, and the laser apparatus is connected to the lower portion, and the reflective surface is positioned on the upper portion to reflect the laser light toward the support surface to visually indicate a position.

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Arlington Heights, IL, United States of America

Jan S Koegel