Hilti Aktiengesellschaft

Jens Frenzel

Hans-Werner Bongers-Ambrosius

Helmut Nussrainer

Helmut Burger

Uto Plank

Reinhard Schulz

Josef F&uuml;nfer

Peter Gerold

Torsten Tussing

Michael Schamberger

A brush holder () has a carbon holder () which forms a guide () for a carbon brush () and at which a holding spring () that presses the carbon brush () against a first guide side of the guide () with a holding pressure force (HF), is provided, with the holding spring () having two portions () which are biased against one another, and with the carbon holder () and the carbon brush () projecting through between the two portions ().

Brush holder

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 percussion rotary hand-held power tool including a percussion piston ( ), an anvil ( ), a chuck ( ) for receiving a working tool, an axially displaceable and rotatable guide tube ( ) located in the housing ( ) and extending in a telescopic-like manner over the chuck ( ) and the anvil ( ) from a chuck region up to a region of the percussion piston ( ), and a sealing element ( ) located between the guide tube ( ) and the housing ( ) and having at least one axial seal ( ) for performing only axial movement and at least one rotary shaft seal ( ) for performing only rotary movement.

Percussion rotary hand-held power tool with a rotatable guide tube

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 tool for drilling and/or chiselling has an axially extending guide tube (9) with at least one radially extending air passage (10) and a control body for selectively closing the air passage. The control body has the stop (30) interacting with a first stop shoulder (18) on a driving anvil (17). The control body can be displaced relative to the guide tube (9) opposite to the working direction of the tool against the biasing action of a spring (12) supported on a connecting sleeve (13) of the control body. The driving anvil (17) has a second stop shoulder (19) facing opposite to the working direction and interacting with a stop surface (20) facing in the working direction. The stop surface (20) is secured axially with the guide tube (9).

Drilling and/or chiselling tool

A tool for drilling and/or chiseling has a striking mechanism (6) within a guide tube (9) for reciprocating a first piston (7) and, via an air cushion, for reciprocating a second piston (19) within the guide tube. The second piston drives a driving anvil (17) in the driving direction. Between the first and second pistons (7, 19) the guide tube (9) has a series of radially extending first air passages (10) arranged in a first plane (E1) extending perpendicularly of the driving direction. A control body can be shifted over the guide tube (9) and is connected to the driving anvil (17). The guide tube (9) has a second series of radially extending second air passages (11) therethrough arranged in a second plane (E2) spaced from the first plane (E1) at a distance (A) opposite to the driving direction.

Growing community of inventors

Landsberg, Germany

Jens Frenzel