Hilti Aktiengesellschaft

Josef Fuenfer

Josef Obermeier

Gerhard Rumpp

Orlaw Massler

Daniel Seltmann

Composite gearwheel for an electropneumatic hammer drill, wherein the composite gearwheel has a basic body, consisting of a first material, and an encircling toothing, and wherein the encircling toothing is formed, along a first circular arc, by a toothed body of the composite gearwheel, and is formed, along the remaining second circular arc, by the basic body itself, wherein the toothed body consists of a second material that is different than the first material.

Composite gearwheel for an electropneumatic hammer drill

A handheld power tool () is provided, including a tool holder () for receiving and locking a tool () on a working axis (), and including a power tool housing (). A striking mechanism () includes a striker () for applying impacts in the impact direction () and an anvil () for absorbing the impacts and for transmitting the impacts in the impact direction () onto the tool () accommodated in the tool holder (). A collar () is fastened to the power tool housing () and to the anvil (). When the anvil () abuts a rebound impact damper () in the impact direction (), the elastic collar () applies a force acting in the impact direction () onto the anvil ().

Handheld power tool

A production method provides for punching holes in a metal strip, cold-forming the metal strip to form a guide tube, and joining the lengthwise edges of the metal strip to each other by a seam or teeth so as to create a uniform material. Subsequently, a piston-like striker is inserted into the guide tube.

Hand-held power tool and production method

A hand-held power tool is disclosed. The tool has a pneumatic striking mechanism. The striking mechanism includes a motor-driven exciter, a guide tube and a striker. A pneumatic spring configured inside the guide tube between the exciter and the striker is circumferentially sealed pressure-tight by an inner surface of the guide tube. The exciter and/or the striker are configured as a piston guided by the inner surface. An inner surface of the guide tube is provided with a plurality of molded depressions.

Chiseling power tool

A hand-held power tool includes a pneumatic percussion mechanism () having a driving member () reciprocating in the guide tube (), a percussion member () driven by the driving member (), and an air spring () located between the driving member () and the percussion member () transmits a reciprocating movement of the driving member () to the percussion member (), The hand-held power tool further includes a motor-driven elongate swashplate member () for reciprocating the driving member () a displacement stroke of which is adjusted by an adjusting member () displaceable along a longitudinal extent of a swashplate member () for adjusting a swashplate angle that determines the displacement stroke of the driving member ().

Hand-held power tool with a pneumatic percussion mechanism

A rock drill has an axially extending shank (1) with a drill head (2) on one end. The drill head (2) has an end face (3) with a cutting blade (4) and cutting pins (5) extending outwardly from the end face in the drilling direction. The cutting blade (4) extends diametrically across the end face and projects radially outwardly from the drill head (2) and axially outwardly from the end face (3). The cutting pins (5) are arranged on a diameter of the drill head which forms an acute angle relative to the cutting blade (4). Due to the acute angle between the cutting pins and the diametrically arranged cutting blade, removal grooves extending axially from the end face can be enlarged.

Growing community of inventors

Koenigsbrunn, Germany

Josef Fuenfer