Hilti Aktiengesellschaft

Hilti Aktiengessellschaft

Martin Richter

Konrad Artmann

Hans-Werner Bongers-Ambrosius

Udo Hauptmann

Werner Kleine

Tim Pr&ouml;ls

Franz Popp

Uto Plank

Thomas Hofbrucker

Reinhard Schulz

Hanspeter Schad

Maximilian Stock

Josef F&uuml;nfer

Wolfgang Lippacher

Wolfgang Erdt

Armin Below

Martin Mayr

Albert Busler

Josef Entner

Wolfgang Regelsberger

Johann Augustin

Josef Bauer

Hans-Werner Bongus-Ambrosius

Peter Sternberger

Kent Karlsson

Boris Koller

Stefen Götzfried

A cup-shaped drill head with an inner conical surface () for force-locking connection with an exterior conical surface () of a driving drill shaft (), which at the leading end changes over into a cup base () with a center point (P), whereby in the change over from the cup base () to the inner conical surface () a lesser curvature (K) is present than at the center point (P).

Cup-shaped rock drill head

A drill head for rock drilling comprising cutting edges () made of hard material, which is detachably connected axially, over a bearing surface (), with a drilling shaft () with at least one radially projecting driver blade () by a bayonet-type connection slot (), wherein at least one connection slot () is present, which forms two axially opposing undercuts (), within which the driver blade () has limited axial movement.

Rock drill head

An assembly for a percussion power tool includes a carrying handle ( ) and a flush head ( ) which is connected with the power tool chuck ( ) for flushing a working tool receivable in the chuck and which has an inlet opening ( ) for a flushing fluid and communicating with the working tool stem ( ), the carrying handle ( ) and the flush head ( ) forming a functional unit.

Carrying handle for a percussion power tool

A percussion electrical tool including an electrical motor ( ) located in a firedamp-protected housing ( ), control electronics ( ) for controlling operation of the electric motor ( ); an inverted rectifier ( ) connecting the control electronics ( ) with the electric motor ( ); an electronic module ( ) located in the housing ( ); an intermediate wall ( ) for separating the electronic module ( ) from a portion of a housing volume in which the electric motor ( ) is located, connected with the inverted rectifier in a heat-conductive manner, and having a fluid-cooled cooling medium conduit.

Rotary-percussion electrical tool

A support for supporting a power tool ( ) on a displacement carriage ( ) and including an attachment element ( ) for connecting the power tool ( ) with the carriage ( ), and a bolt insertable into an eyelet ( ) of the power tool ( ) for releasably connecting the attachment element ( ) with the power tool ( ) with the bolt ( ) having axial and radial conduits ( ) communicating with an outer cylindrical surface of the bolt ( ), so that predetermined position of the bolt ( ) in the eyelet ( ), a drilling fluid can be delivered through the bolt ( ) to fluid conduits ( ) of the power tool ( ).

Support for supporting a power tool on a displacement carriage

A rock drilling tool including a tip ( ) formed of a hard material and provided at one end of the tool stem and a shank ( ) provided at an opposite end of the stem ( ) and having a plurality of entrain grooves ( ) extending up to a free end surface of the shank ( ), with an entire recessed surface ( ) of an entrain groove ( ) being larger than an entire outer surface ( ) of a groove-forming rest web ( ), and with a mean rest cross-sectional area (A&prime;), which is measured within an axial section of the drilling tool having a length at least equal to a product of a natural logarithm base and a stem diameter (e&times;D), deviating from a mean rest cross sectional area (A) along the entire tool length maximum by 20%.

Rock drilling tool

A rock drill including a drilling rod ( ), a cup-shaped drilling head ( ) secured to the drilling rod ( ) at one of its ends, and connection elements including at least one radially projecting, entraining web ( ) associated with the drilling rod ( ) and received in at least one axially extending entrain slot ( ) which is formed in an entrain surface of the cup-shaped drilling head ( ) for securing the drilling head ( ) to the drilling rod ( ) for joint rotation therewith and for a limited axial displacement relative thereto.

Rock drill

An electric tool device ( ) for an at least partially rotating and percussive striking driving mechanism with a pneumatic striking mechanism ( ), which is driven over a gear assembly ( ) by an electronically commutated electric motor ( ) with an internal rotor ( ) having poles ( ) and an external stator ( ), having field coils ( ) connected with a DC-AC converter of control electronics ( ), the power take-off side of the rotor shaft ( ) being mounted in the gear assembly ( ) and the driving end of the rotor shaft ( ) with the freely protruding poles ( ) engaging the stator ( ), being introduced coaxially into the stator ( ).

Percussive striking electric tool device

An electrical hand operated tool driving device ( ), such as a hammer drill, a combination hammer or a chipping hammer, has an electropneumatic striking mechanism ( ), for which a cooling medium ( ), for cooling the striking mechanism ( ), flows through a liquid-tight cooling medium duct ( ), which is disposed in a housing ( ) of the tool driving device ( ).

Electrical hand operated tool driving device with an electropneumatic striking mechanism

A working tool for use with a percussion power tool and including a cushioning elongate stem ( ), and a head ( ) connected with the stem ( ) for joint rotation therewith and for a limited axial displacement relative thereto, with the tool head ( ) being adapted, with respect to its resistance associated with its cushioning properties, to characteristics of the percussion piston ( ) of the power tool and with the tool stem ( ) and the tool head ( ) having mutually abutting each other end surfaces ( ) which form at least a partially flat contact upon abutting each other.

Working tool for a percussion power tool

A drilling and/or chiseling tool ( ) comprises a shaft ( ) and a cylindrical insertion end ( ) connected with the shaft ( ) with at least one elongated recess ( to ), open toward the outer surface of and toward the free end of the insertion end ( ) and forming a rotationally locking groove. A collar ( ) is disposed between the shaft ( ) and the insertion end ( ) and extends at least partially around the tool ( ) and projects at least radially outwardly of the shaft ( ) and of the insertion end ( ). The cylindrical insertion end ( )has a diameter not less than mm and preferably larger than mm. The at least one recess ( to ) has a cross-sectional area, extending perpendicularly to the axis of the tool ( ), and expands toward the outer surface and is provided essentially in the form of an arc of a circle. A tool chuck of a drilling and/or chiseling device, matched to the insertion end, is provided to receive the insertion end ( ) of the tool ( ) and fit rotationally locking bodies into the at least one elongated recess ( to ).

Drilling and/or chiseling tool

A percussion electrical hand-held tool including a housing ( ), a percussion element ( ) located in the housing, and a planetary gear unit ( ) located in the housing ( ) for converting a rotational movement ( ) of the drive shaft (&ohgr;) of the hand-held tool ( ) into a reciprocating movement (&ugr;) of the percussion element ( ), with the planetary gear unit ( ) including a sun gear ( ) changing of a setting (&agr;) of which provides for adjusting of an impact amplitude of the reciprocating movement (&agr;) of the percussion element ( ), and control unit located in the housing ( ) for adjusting the impact amplitude in accordance with a manual axial force applied to the handle of the hand-held tool ( ).

Percussion electrical hand-held 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 drilling and/or chiseling device has a drive spindle ( ) for a drilling and/or chiseling tool with two ring gears ( ) of different sizes, a countershaft ( ) with a drive pinion ( ), a wobble drive ( ) for a striking mechanism, mounted on the countershaft ( ), and a switching sleeve ( ), mounted on the countershaft ( ) so that it can be shifted axially by a switching element ( ). The switching element displaces the switching sleeve ( ) into four different modes of operation of the drilling and/or chiseling device.

Drilling and/or chiseling device

A device for transmitting impulse-like blows to a continuously rotatable tool bit (6) is formed as an axially extending adapter (1) having a first chuck for the tool bit (6) and being insertable at a trailing end into a second tool bit chuck in a manually operated tool equipped with a striking mechanism. The adapter (1) has a housing (2) containing a unit for superimposing a second blow component on the first impulse blow component produced by the striking mechanism, so that an impulse-like drilling blow can be transmitted to the drill bit (6) made up of an axially directed blow component and a torsional blow component.

Growing community of inventors

Freising, Germany

Martin Richter