Hilti Aktiengesellschaft

Uto Plank

Stefan Hammerstingl

Erwin Manschitz

Anton Neumaier

Ernst-Rudolf Lübkert

Alexander Buchenau

Olaf Koch

Harald Geiger

Armin Below

Josef Anzinger

Karin Groth

Martin Richter

Gerhard Rumpp

Josef Fünfer

Holger Cecchin

Jens Frenzel

Jochen Erhardt

Matthias Keith

Ulrich Mandel

Andres Wellmann Jelic

Helmut Nussrainer

Johann Augustin

Dieter Kraus

Manuel Rosenzweig

Vera Nuebel

Josef FÜNFER

An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is designed as an externally toothed gearwheel and is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing about an axis of rotation on the other side, an axial gap, preferably for optionally receiving at least part of a lubrication space separating element, is provided between an eccentric wheel surface facing the connecting rod and a connecting rod surface facing the eccentric wheel.

Electropneumatic impact mechanism

An electric hand-held power tool, in particular a hammer drill and/or chipping hammer, having an electropneumatic impact mechanism which has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in an axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing via an end plate of the transmission housing on the other side, wherein the transmission housing is subdivided at least into a main shell and a cover shell separate from the main shell, such that the guide tube is braced against the main shell at least partially by the cover shell.

Electric hand-held power tool

Hammer drill and/or chipping hammer having a drive motor, an impact mechanism and a tool fitting for fitting a tool, wherein the impact mechanism has an anvil that is axially displaceable in an anvil guide and acts on the tool, wherein the impact mechanism has an idle-strike damper element and a rebound-strike damper element, which are formed in one piece with one another and as such form a combined damper element, wherein the anvil guide is arranged outside, preferably only outside the combined damper element.

Impact mechanism arrangement

An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing on the other side, wherein the impact mechanism has a bearing body on which the eccentric wheel is mounted rotatably by means of a pair of plain bearings.

The tool holder according to the invention for a chipping hammer has a tool receptacle for receiving a tool and a tool securing device for securing the tool in the tool receptacle. The tool securing device provides a shaft having an eccentrically arranged mandrel and at least one end piece and a bar having at least one eye in which the end piece engages in a form-fitting manner. The tool securing device is pivotable into at least one first position for inserting and removing the tool and into at least one second position for securing the tool. The eye has a non-circular cross-section.

Tool holder

A portable hand-held power tool (), especially in the form of a drilling or chisel hammer, includes a drive assembly () located in the tool housing () for driving a tool spindle () along an operational axis (A), a first handle () which is rotatable around a first pivotal axis (S) by a first handle suspension (), a second handle () located on the opposite sides () of the housing which is rotatable around a second pivotal axis (S) by a second handle suspension (), and spring elements for retaining the handles () in their initial position, with the first and second handle suspensions () extending partially circumferentially about the drive assembly ().

Hand-held power tool with spring-loaded handle suspension

A hand-held power tool includes two vibration-damped handles (), two handle attachment axles () for securing the two handles () on the tool outer housing (), respectively, and extending at an angle to respective longitudinal axes () of respective handles (), each handle attachment axle being surrounded, at least in some areas, by the mounting section () of the respective handle (), a damping sleeve () formed of an elastic material and provided between the mounting section () of the respective handle () and the respective handle attachment axle (), with the damping sleeve () forming a first damping element, and a damping body () provided on a free end () of each handle () and forming a second damping element and having an extension (D) in a radial, with respect to the handle longitudinal axis, direction that is greater than a minimal radial extension (T) of the handle () at its free, second end.

Hand-held power tool

An electrical hand-held power tool includes an assembly () vibrating along a vibration axis (A) during operation of the power tool, at least one, transversely projecting, vibration-decoupled pivotal side handle (), a manual switch () having an actuation element () arranged in the side handle () and switchingly connectable with at least one sensor switch () which is located in the assembly () in vicinity of the handle pivot point (G), by a switching rod () having a switching element () and being pivotally supported on the side handle at a switching pivot point (S) spaced from the handle pivot point (G) and from the vibration axis (A).

Percussion hand-held power tool with contactless manual switch located in side handle

A chuck for a percussion hand-held power tool including a coupling sleeve ( ) for receiving a working tool and having two diametrically opposite, slot-shaped, radial openings ( &prime;) in which two locking members ( ) radially and axially displace a locking sleeve surrounding the coupling sleeve ( ) and the locking members ( ), and a spring-biased push-sleeve ( ) formlockingly cooperating with the locking members ( ), with the locking members ( ) being supported against the inner surface ( ) of the locking sleeve ( ), extending into an interior of the coupling sleeve ( ), and having each a radial dimension greater than a thickness of the coupling sleeve wall and a width decreasing toward a chuck axis (A).

Chuck for a percussion hand-held power tool

A chuck for receiving a tool shank of a boring tool and including radially displaceable engagement members ( ) formlockingly engageable in the radial recesses ( ) formed in the clamp region of the tool shank, an axially displaceable control sleeve ( ) for radially displacing the engagement members between their engagement and release positions, and a resilient holding member ( ) arranged between the control sleeve ( ) and the clamp region of the tool shank and having a detent element ( ) for preventing displacement of the control sleeve into its locking position ( ) from its release position ( ) into which the control sleeve was displaced upon insertion of the boring tool.

Chuck for a boring tool

A percussion mechanism for an electrical hand-held power tool including a guide tube, a percussion piston ( ) axially displaceable in the guide tube ( ), an anvil ( ) for impacting a working tool and axially displaceable together with the percussion piston ( ), a gas spring ( ) provided on an axial side of the percussion piston ( ) remote from the anvil ( ), an air channel ( ) for aeration of the gas spring ( ) and extending between an axial region of the gas spring ( ) and an axial region of the anvil ( ) outwardly of the inner surface of the guide tube ( ), and a ventilation opening ( ) for communicating the air channel ( ) with a surrounding environment and which is closed by the anvil ( ) in its operational position.

Percussion mechanism for an electrical hand-held tool with a blank blow cut-off

A chuck for drilling and chiseling tools and including a receiving sleeve at least one through-opening formed in a sleeve wall at least one locking member supported for a limited pivotal movement about a pivot axis, which extends substantially perpendicular to a longitudinal axis of the receiving sleeve, and projecting at least partially into the through-opening (12) of the sleeve with the locking member (6) extending in its locking position through the through-opening (12) into a receiving sleeve inferior, a guide ring surrounding the receiving sleeve and at least partially overlapping the locking member (6) in its locking position, preventing the locking member (6) from pivoting into its release position and an actuation sleeve (7) displaceable in a direction opposite to an operational direction of the tool against a spring-biasing force for enabling pivoting of the locking member (6) into the release position, with the locking member (6) being pivotally connected with the actuation sleeve (7).

Chuck for drilling and chiseling tools

In a hand-held tool having a tool holder for receiving a variety of tool bits, a probing device is provided for checking the surface configuration of the shank of a tool bit inserted into the tool holder. The probing device includes at least one control element arranged to move radially inwardly through an opening in the tool holder. If the control element moves radially inwardly into an axially elongated recess in the tool bit shank, it moves out of stopping engagement with a slide permitting the slide to move relative to the control element and initiating a switching operation for changing the driving action of the hand-held tool.

Hand-held tool with switching means for variable operation

A hand-held device, such as a hammer drill, has a replaceable axially extending holder for a working tool. The device includes a sensor and a signal transmitter for adjusting its operating characteristics. The holder has through openings containing locking elements and control elements. The locking elements and control elements are radially displaceable within the through openings by a locking sleeve. The position of the locking sleeve in the axial direction of and relative to the holder determines the cooperation of the sensor and the signal transmitters.

Variably operable hand-held device

A hand-held device with a holder for a working tool has a sensing mechanism for automatically initiating different operating modes. Different configurations of working tools inserted into the holder can be sensed by sensing elements in the form of balls. The balls cooperate with pivotal levers and a sensor for producing switching signals for initiating a switching operation.

Growing community of inventors

Freising, Germany

Uto Plank