Abstract: A pneumatically striking hand-held power tool is controlled by the following steps. An acceleration (a) along a striking axis (8) of the hand-held power tool (1) is detected. A driving power is reduced if the detected acceleration (a) is greater than a threshold value (A), the threshold value (A) being selected to be greater than maximum acceleration values (a1, a2) that occur on a workpiece during the striking operation of the hand-held power tool (1).

Abstract: A chuck, which is releasably connectable with a tool spindle (1), includes a guide sleeve (3) having a plurality of openings (4), a plurality of locking elements formed as tilt segments (5) each having an axially fixedly supported, support part (7) and a radially tiltable locking part (8) extendable into a respective opening (4) of the guide sleeve (3) for engaging the tool spindle (1), and a manually displaceable locking sleeve (6) for radially locking the locking elements.

Abstract: A hand-held power tool includes a vibration-compensating mass (3, 3?) secured on the tool housing and having at least one rigid compensation mass (4, 4?, 4?) oscillating along an oscillation axis (A), formed of a plurality of fixedly connected with each other mass components (12, 12?, 12?), and supported relative to the housing (2), by at least one spring (5).

Abstract: A hand-held power tool includes a motor-driven percussion mechanism including a guide tube (21), a reciprocating driving member (22) displaceable in the guide tube (21) for driving, via a gas spring, an impact member (23) likewise displaceable in the guide tube (21) a motor-driven eccentric wheel (17) rotatable about an axis (D) which is spaced from the percussion mechanism axis (S) in a direction perpendicular to the percussion mechanism axis (S) by a distance (X), and a connection rod (29) eccentrically supported on the eccentric wheel (17) and connected to the driving member (22) for converting a rotational movement of the eccentric wheel (17) into a reciprocating movement of the driving member (22).

Abstract: An oscillation damper (3) which is designed for being mounted on a housing (2) of a hand-held power tool (1) and includes an oscillating damping mass (4); and at least one spring (5) located completely, with respect to its axial length, within the damping mass (4) for axially compressively preloading the damping mass (4) against the housing (2) of the power tool (1).

Abstract: A chuck for a rotary and/or percussion power tool includes a rotatable sleeve-shaped base body (1), and at least two wear-resistant guide shells (6, 7) located within the base body and connected with the base body (1) for joint rotation therewith and having projecting radially inwardly entraining elements, with at least one of the at least two guide shells (6, 7) being radially displaceable in the base body (1) within certain limits and forming a projecting radially inwardly locking member (9).

Abstract: A chuck, which is releasably connectable with a tool spindle (1), includes a guide sleeve (3) having a plurality of openings (4), a plurality of locking elements formed as tilt segments (5) each having an axially fixedly supported, support part (7) and a radially tiltable locking part (8) extendable into a respective opening (4) of the guide sleeve (3) for engaging the tool spindle (1), and a manually displaceable locking sleeve (6) for radially locking the locking elements.

Abstract: An electrical hand-held power tool includes a non-contacting electrical manual control switch (3) having an operating element (4) and a sensor switch (5), a pivotable carrier (6) which carries a switching element (13) and which is manually controlled by the operating element (4) of the manually control switch (3), the sensor switch (5) being connected with the carrier (6) vibration-free, and pivot transmitting device (7) axially displaceable along the vibration axis A) of a vibrating assembly (2) of the power tool relative to the operating element (4) for pivoting the carrier (6) in response to actuation of the operating element (4).

Abstract: A percussion mechanism (21; 41) for a percussion power tool includes an impact element (24; 44) reciprocating along a percussion axis (22; 42) of the percussion mechanism (21; 41) and acting on the striker (26, 46). The contact point (27, 47) and counter-contact point (28, 48) are provided between the striker (26, 46) and the impact element (24, 44), with the contact point (27, 47) being formed as an exposed contact point and being arranged outside of the percussion axis (22; 42).

Abstract: An electrical hand-held tool includes an electric motor (2) having a rotor shaft (3) extending transverse to the tool percussion axis (A), a rotor sheet stack (4) supported on the rotor shaft, and a pinion (5) supported on the rotor shaft, a percussion mechanism (6) including an eccentric (7), and a drive gear (8) engageable with the motor pinion (5) for driving the eccentric (7), with the rotor sheet stack (4) being arranged, with respect to the percussion axis A, completely diametrically opposite the drive gear (8).

Abstract: A hand-held electrical combination hammer drill capable of being used both as a drilling hammer and as a chisel hammer, and including an actuation member (17) for actuating an electrical on-off switch of the hammer drill and located on the tool handle switching elements (3, 4) for switching between drilling and chiseling operations, stop elements (5–22) actuated by the switching means (3, 4) for retaining the actuation member (17) in a on-position of the on-off switch upon selection of the chiseling operation, and a stop switch (15) having, upon selection of the chiseling operation, a first position in which the stop switch provides for securing the actuation member (17) in its on-position with the stop elements (5–22), and a second position in which the stop elements occupies a non-operative position in which the actuation member, upon being released, automatically moves into its off-position under an action of a biasing force.

Abstract: An electrical hand-held power tool includes a non-contacting electrical manual control switch (3) having an operating element (4) and a sensor switch (5), a pivotable carrier (6) which carries a switching element (13) and which is manually controlled by the operating element (4) of the manually control switch (3), the sensor switch (5) being connected with the carrier (6) vibration-free, and pivot transmitting device (7) axially displaceable along the vibration axis A) of a vibrating assembly (2) of the power tool relative to the operating element (4) for pivoting the carrier (6) in response to actuation of the operating element (4).

Abstract: A vibration-decoupling arrangement for supporting a percussion unit (2) in a hand-held percussion power tool includes a spring (4) arranged between the percussion unit (2) and a tool housing (3) and preloaded against an engagement point (P) in the housing (3) for preventing vibrations of the percussion unit (2) from being transmitted to the housing (3), and two axially spaced, flexurally deformable, articulated arms (5a, 5b) secured in the housing (3) for supporting the percussion unit (2) in the housing (3), with the arms (5a, 5b) being secured in the housing (3) with a possibility of a limited axial displacement and without any slip motion relative to the housing.

Abstract: A partially percussive electrical hand tool machine (1) having a portable housing (3), a striking mechanism module (4) connected, in a vibration-damped manner, to the housing (3) and having electrical lines (5) for electrical connection of the relatively moveable striking mechanism module (4) to the housing (3). The electrical lines (5) are non-vibrationally attached in a bending flexible wiring bridge (7) arranged transverse to the striking axis (A).

Abstract: An electrical tool includes a housing (2) in which at least one of motor (3), electronics (16), and drive gear (4) is arranged, a conductor channel (11) having at least one flexible section (14) and a rigid section (15), and at least one stranded conductor arranged in a receptacle (12) of the conductor channel (11) and having one of its ends connected with a conductor of the network cable (8) of the tool and another of its ends conductively connected with a component of the electrical tool (1).

Abstract: The object of the invention is a device, intended for a multifunctional, hand-held tool machine, for example, an electric combination hammer, for the ON/OFF switching or changeover of individual system functions when changing the processing mode, for example, from “hammer drilling” to “chiseling”. Pursuant to the invention, the changeover device, which is to be actuated by the user, is coupled with a mechanical driving mechanism, by which a bistable switch, comprising two mutually oppositely movable elements, is actuated. In a combination hammer, the invention guarantees that, when the chiseling operation is selected, certain functions of the system, such as a monitoring of the reaction moment, are interrupted or changed over.

Abstract: An electrical tool includes a housing having inlet (7) and outlet (8) openings, a brushless electric motor (2) and an inverted rectifier (3) both arranged in the housing (9) between inlet (7) and outlet (8) openings in an air stream (5) of an air volume (6), and a link condensator (10) located in the housing (9) in the air stream (5), with the inverted rectifier (3) being arranged, in the air flow direction, downstream of the link condensator (10) and upstream of the electric motor (2).

Abstract: An electrical hand tool machine (1) having an assembly (2) vibrating along an axis of vibration (A), a non-contacting electrical manual control switch (3) with an operating means (4) and a sensor switch (5), wherein the sensor switch (5) is connected non-vibrating with an at least pivotable switching means carrier (6), whose axis of pivot (S) is oriented along the axis of vibration (A) and which can be manually controlled by the operating means via a pivot transmitting means (7) that is limited axially displaceable

Abstract: An electrical hand-held tool includes an electric motor (2) having a rotor shaft (3) extending transverse to the tool percussion axis (A), a rotor sheet stack (4) supported on the rotor shaft, and a pinion (5) supported on the rotor shaft, a percussion mechanism (6) including an eccentric (7), and a drive gear (8) engageable with the motor pinion (5) for driving the eccentric (7), with the rotor sheet stack (4) being arranged, with respect to the percussion axis A, completely diametrically opposite the drive gear (8).

Abstract: A vibration-decoupling arrangement for supporting a percussion unit (2) in a hand-held percussion power tool includes a spring (4) arranged between the percussion unit (2) and a tool housing (3) and preloaded against an engagement point (P) in the housing (3) for preventing vibrations of the percussion unit (2) from being transmitted to the housing (3), and two axially spaced, flexurally deformable, articulated arms (5a, 5b) secured in the housing (3) for supporting the percussion unit (2) in the housing (3), with the arms (5a, 5b) being secured in the housing (3) with a possibility of a limited axial displacement and without any slip motion relative to the housing.