Robert Boschgmbh

Ludwig Thome

Karl Wanner

Gerhard Meixner

Karl Frauhammer

Heinz Schnerring

Manfred Hellbach

Werner Lehmann

Peter Nadig

Thomas Klaas

Oliver Zirn

Georg Hansis

Felix Blank

Manfred Klein

Joerg Faelche

Karlheinz Bretthauer

Helmut Kapfer

Roland Hecker

The invention is based on a hand power tool having an electric motor () located in a housing (), via which an insertable tool () situated in a tool mount () is capable of being driven in a rotating manner, and having a safety device () with which a characteristic value for an occurrence of uncontrolled blockage of the insertable tool () can be detected via a sensor unit (), and the movement of the housing () can be decelerated. It is proposed that the safety device () is formed at least partially by a motor control unit (), via which the electric motor () can be actively decelerated when an occurrence of uncontrolled blockage of the insertable tool () is detected.

Hand-held machine tool

A hand-held power tool has a machine housing, a drive motor, a tool receptacle, a drive strand accommodated in the machine housing and extending between the drive motor and the tool receptacle, and a detection device for detecting an uncontrolled operational condition of the hand-held power tool, and a blocking device which in case of the uncontrolled operational condition form-lockingly connects the drive strand with the machine housing, the blocking device including at least one locking member which is housing-fixed in a rotary direction of the drive strand and at least one locking member which co-rotates in the drive strand so that the locking member and the blocking member are bringable in engagement with one another, the locking member and the blocking member being bringable in engagement with one another axially in direction of a rotary axis of the blocking member.

Hand-held power tool

A hand power tool has a machine housing, a drive motor accommodated in the machine housing, a drive train connected with the drive motor and provided with a tool receptacle for rotation of a tool insertable in the tool receptacle, a detecting device for detecting an uncontrolled operation of the hand power tool by detecting a blocking of the tool in a workpiece with a resulting impact-like turning of the machine housing, a blocking device provided for the drive train and releasable by the detecting device, the locking device having a locking toothing arranged in the drive train and a blocking member movably supported in the machine housing and form-lockingly engagable in the locking toothing so as to non-rotatably fix the drive train relative to the machine housing, the detecting device being formed so that it produces an electrical release signal in an uncontrolled operation, the blocking device being releasable by the electrical release signal, and further has electromagnet device actuatable by the release signal so that the locking member is engagable by the electromagnet device into the locking toothing.

Hand power tool

An angular attachment to a rotary and percussive power machine, such as a hammer drill, includes a rotary power input tubular member driven by a rotary part of the power machine, a tubular power output supported for rotation at an angle relative to the axis of rotation of the power input member and including a holder for a rotary and percussive work tool. The tubular power input and output members are interconnected by an intermediate power transmission. A device for transmitting impacts from the percussive part of the power machine includes two guiding channels arranged in alignment with central bores of the tubular power input and output members and each enclosing at least one impact deviating element. The impact deviating elements are in sliding engagement with each other and with a corresponding coupling member arranged in respective contact bores of the power input and output members.

Angular attachment for transmitting and deviating output power of a

An electrically driven linear vibrator has swing drive for vibrating troughs, jarring tables or the like comprises a stator with an exciter winding, an armature guided for linear movement in a direction transverse to the field produced by the stator and a pair of oppositely acting return springs forming together a swing drive, the vibration of which may be used to drive a device connected to the vibrator. The return springs may be constituted by metal springs, gas springs or a combination of both. The swing drive may be constructed as single-acting or double-acting drives. A diode may be connected with the electrical conductors leading to exciter winding so that at a line frequency of 50 Hz, an oscillation frequency of 100 Hz, 50 Hz or 25 Hz may be obtained. The vibrator may also be provided with a piston blower for cooling the windings of the stator.

Linear electromagnetic vibrator

A hand-held power tool has a tool holder, a tool axially reciprocable in the tool holder, and a striking mechanism including a drive piston and a striker having a disc-shaped plate with a small axial dimension and a striker shaft having a cross sectional dimension corresponding to that of a tool shaft. The striker shaft transmits impact energy directly to a rear end face of the tool shaft without an intermediate member.

Percussion hammer with a one piece striker

Growing community of inventors

Leinfelden-Echterdingen, Germany

Ludwig Thome