Hilti Aktiengesellschaft

Josef F&uuml;nfer

Helmut Burger

Franz Popp

Udo Hauptmann

Martin Richter

Konrad Artmann

Hanspeter Schad

Jens Frenzel

Michael Schamberger

Josef Bauer

Claus Gilger

Michael Bohuschke

A chuck for a rotary-percussion power tool ( ) and including a working tool guide ( ) for receiving a shank ( ) of a working tool, at least one locking member ( ) for limiting an axial displacement of the shank ( ) within an axial displacement length (X) from opposite sides, and a displaceable, spring-biased stop member ( ) cooperating, within the shank displacement length (X), with a power tool side, stop surface ( ) of the shank ( ).

Chuck for a percussion tool

A switch assembly ( ) for centrally arranged operating mode selection for an at least partially rotary and percussion combination hand tool device ( ) is comprised of a first switch sleeve ( ) for the switchable percussion drive ( ) and a second switch sleeve ( ) for the switchable rotary drive meshing with a tool spindle ( ) via a countershaft ( ) and a switch accessory ( ) connecting both switch sleeves ( ) together, whereby the countershaft ( ) and a percussion drive shaft ( ) of the percussion drive ( ) are arranged directly adjacent and parallel in a common axially extending zone (B) and rotationally-freely guide a driving gear pair ( ) in direct meshing engagement with each other and which can be engaged by way of the switch sleeves ( ).

Switch assembly for a combined hand tool device

A transmission ( ) for a hand tool device with two laterally spaced shafts ( ) having parallel axes (A, A&prime;). which can be switched using switch sleeves ( ) arranged movable in an axially limited manner on the shafts, whereby both switch sleeves ( ) are switchably coupled to one another by a switch transmission unit ( ) in a rotationally free axially form-fitting manner and engaging into the switch sleeves and which are resiliently spring-biased along the axes (A, A&prime;) by a spring arrangement ( ).

Switch transmission unit for combined switching of a gear

A rotary mode selection switch ( ) for the synchronized switching over of the operating mode of a hand tool. The switch ( ) comprising a manually externally actuated driving member ( ) and a driven member ( ), wherein the driving member ( ) includes two eccentrically disposed recesses ( &prime;) for receiving two spring elements ( &prime;). The two spring elements ( &prime;) include initial front surfaces ( &prime;) that contact the driving member ( ) and second front surfaces ( &prime;) that are oriented in the same direction, wherein with an angle shift (&agr;) of the driving member ( ) relative to the driven member ( ), at least one of the second front surfaces ( &prime;) of the spring elements ( &prime;) alternately contacts at least one eccentrically disposed contact piece ( &prime;, the contact piece axially engaging into the recesses ( &prime;), of the driven member ( ).

Rotary mode change switch for a hand tool

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 rotary switch for a hand-held tool and including a manually operated actuation member ( ) rotatable over a predetermined angle (&phgr;) for switching from one operational mode to another immediately adjacent operational mode, a rotatable switching member ( ) arranged coaxially with the actuation member ( ), an overhanging spring ( ) connected with the switching member ( ) for joint rotation therewith, and an operating pin ( ) connected with the actuation member ( ) and arranged eccentrically with respect to its rotational axis for deflecting an arm of the overhanging spring to thereby rotate the switching member ( ) over a predetermined angle to provide for a predetermined displacement of the switching element ( ) of the hand-held tool.

Rotary switch for a hand-held power tool and a switching device including the rotary switch

An electrical hand-held tool having a plurality of operational modes and including a tool spindle ( ) rotatably supported in the tool housing ( ) for rotation about a rotational axis (A), an outer sleeve ( ) arranged coaxially with the tool spindle ( ) and connected thereto for joint rotation therewith, a bolt ( ) supported in the housing without a possibility of rotation relative thereto and displaceable in a direction transverse to the rotational axis (A) for engaging in at least one opining ( ) provided in the sleeve ( ) at least in one of the operational modes of the electrical tool, and a sliding sleeve ( ) supported on a drive shaft ( ) of the electrical tool and connected with the bolt ( ) for displacing same in response to actuation of a mode selection switch ( ).

Combination electrical hand-held tool

A battery-powered drill including a housing ( ) with a handle ( ), an electrical drive motor ( ) located in the housing ( ) a battery unit ( ) insertable into the housing ( ) and fixedly securable therein for supplying electrical power to the electrical drive motor, a connection device for connecting the battery unit ( ) with the electrical drive motor ( ) and including a connector element ( ) projecting from the battery unit ( ) and a mating connector element ( ) provided in the housing ( ) and electrically connectable with the connector element ( ) provided on the battery unit ( ), and a press pin element for supporting the battery unit on the housing ( ) and displaceable against a spring-biasing force upon the mounting of the battery unit ( ) on the housing ( ) for securing the battery unit ( ) on the housing ( ).

Battery-powered drill

An electromotor including a stator (,), a rotor (,), a commutator (,) fixedly connected with the rotor (,), two carbon brushes (,) cooperating with the commutator (,), two brush holders (,) spaced from each other and aligned coaxially relative to each other, and a connection member (,) for connecting the two brush holders (,) and having two connection sections (,) formed of a non-conductive material, and an elastic section (,) extending between the connection sections (,), with each connection section (,) having an attachment point (,) for releasably connecting the connection section (,) with the stator, and with each brush holder (,) having an end region projecting beyond the carbon brush and with which the brush holder is arranged on the associated connection section (,).

Growing community of inventors

Königsbrunn, Germany

Josef Fünfer

Growing community of inventors

Königsbrunn, Germany

Josef F&uuml;nfer

Josef Fünfer