Hilti Aktiengesellschaft

Rory Britz

Rainer Ontl

Markus Hartmann

Thomas Hofbrucker

Hans-Werner Bongers-Ambrosius

Franz Popp

Stefan Schmid

Aaron Wiedner

David Hruza

Peter Brugger

Frank Fritsch

Ernst-Rudolf Luebkert

Kathrin Sax

David Koscheck

Tobias Schmid

Valentin Keller

Kevin Guo

Georg Fürfanger

Ralph Neuh&auml;user

Michael Nitzschner

James Zhong

Florian Hurka

The portable power chiseling tool has a tool holder, an electric motor, a striking mechanism and an idle strike catcher. The tool holder can receive a tool and retain it movably on a working axis. The striking mechanism includes an exciter piston, a striker, an anvil and a guide for the anvil. The exciter piston is coupled to the electric motor. The guide guides the anvil on the working axis. The idle strike catcher for the anvil has a conical inner surface facing the anvil. The anvil has an associated end face facing in the striking direction. The end face rests against the conical inner surface when the anvil is in its forwardmost position in the striking direction. The end face of the anvil has a first segment and a second segment in the circumferential direction. The second segment is offset in the striking direction relative to the first segment.

Portable power tool

A power tool for chiseling and drilling includes a housing, a motor disposed inside the housing, and a pneumatic percussion mechanism. An operation mode selector switch is disposed on the housing and has a first operation mode setting and a second operation mode setting where the first operation mode setting activates the pneumatic percussion mechanism and the second operation mode setting deactivates the pneumatic percussion mechanism. A valve has an inlet-port formed inside the guiding tube and an outlet-port formed outside the guiding tube where the valve is connected to the operation mode selector switch. The valve is closed in the first operation mode setting which disables an air exchange between the inlet-port and the outlet-port and the valve is open in the second operation mode setting which enables the air exchange between the inlet-port and the outlet-port.

Power tool

A hand-held machine tool for a striking tool has a motor, an impact mechanism, a spool valve, and a pneumatic chamber. The impact mechanism has an exciter piston moved by the motor, and a hammer coupled to the exciter piston via a pneumatic chamber between the exciter piston and the hammer, and a striker in front of the hammer in the striking direction. In a working position counter to the striking direction, the striker bears on a stop, in a starting position the striker is offset in the striking direction relative to the working position, and in a rest position the striker is offset in the striking direction relative to the starting position. In the starting position, the hammer bearing on the striker closes the spool valve and, in the rest position, the hammer bearing on the striker opens the spool valve.

Striking hand-held machine tool

The invention relates to a striking hand-held machine tool having a tool holder for holding a striking tool on a working shaft, an electric motor, and a striking mechanism. In the striking direction, the striking mechanism has an exciter piston, a pneumatic chamber, a striker, an intermediate chamber and a rivet snap following one another. A closed channel connects a first channel opening in the pneumatic chamber and a second channel opening in the intermediate chamber. A non-return valve, which shuts off during an air flow from the first channel opening to the second channel opening and opens during an air flow from the second channel opening to the first channel opening, is arranged in the channel. Arranged on the second channel opening is a shut-off valve, which is forced into a position closing the second channel opening when the rivet snap is in the working position.

An electrical hand-held power tool () includes a housing () in which a drive () is located, a ventilator () for forming a suction region () and a pressure region () in the housing () which provide for an air flow (L) that serves for cooling at least parts of the drive (), and a separation element () arranged between the suction region () and the pressure region () and fixedly secured in the housing (), the separation element () having an opening for forming a limited wire passage region () from the suction region () into the pressure region ().

Hand-held power tool with grounding

A hand-held power tool includes a pneumatic percussion mechanism having a percussion piston reciprocating along a percussion axis and having a bore extending at an angle to the percussion axis, and an air spring for displacing the percussion piston.

Hand-held power tool with a pneumatic percussion mechanism

An extracting device () for removing material cut away in the operation of a motor-driven hand tool, has an extracting opening () and a receiving space () for the cut material, which communicate with one another through an extracting path, and an air current generator () for generating an air current (L) from the extracting opening () to the receiving space (). A closure device () is provided between the extracting opening () and the receiving space (), which at least substantially places the extracting path in a closed position and which is operated by the air current (L). The closure device () is arranged between the extracting opening () and the air current generator () and the closure device () has a closure element (), which can be removed from a valve seat () by means of an underpressure created by the air current generator () for forming an open position of the closure device.

Dust extracting device

A hand-held power tool () connectable with a dust suction module () includes a motor () and an air flow generator () which for cooling the motor () is located, together with the motor (), in air flow path () between an air inlet and an air outlet () both formed in the tool housing, (), with an air inlet having a side opening () and a connection opening () connectable with the suction path () of the dust suction module () and the dust suction module () having a suction conduit () for connecting the suction path () with the air flow path () and adjoining the connection opening () in a connected condition of the dust suction module () with the power tool, and with the power tool () further having a closing member provided on the connection opening (), operable by the dust suction module (), and having, in an attached position of the dust section module (), an open position, and having a closed position in the detached condition of the dust suction module ().

Hand-held power tool with a dust suction module

A hammer drill () includes a clockwise and counterclockwise driven tool spindle (), a drive pinion () operatively connectable with the tool spindle () for transmitting a torque thereto, a separate control handle () for selecting one of the hammer drill functions including a pure drilling operation, a pure percussion operation, and a rotary-percussion operation), and a switching device () which is adjustable in accordance with a position of the control handle () and which is shiftable by the control handle () in a clockwise rotation position for effecting a pure drilling operation in a clockwise direction and in a counterclockwise rotation position for effecting a pure drilling operation in a counterclockwise direction.

Hammer drill

A motor-switch arrangement for a hand-held power tool includes a drive motor (), an actuating switch () with a contact plug (), and an adapter () arranged between the contact plug () and the drive motor () and having a plug connecter () cooperating with the counter-plug contact element () of the drive motor () for establishing a first electrical plug connection (a) of the adapter (), and a counter-plug connecter () electrically connected with the plug connecter () and cooperating with a plug contact element () of the contact plug () for establishing a second electrical plug connection (b) of the adapter ().

Motor-switch arrangement for a hand-held power tool

A commutator for commutator motors has a glass carrier body (), and a plurality of electrically conductive segments () which are arranged at an outer circumferential surface () of the carrier body ().

Commutator

A cooling and flushing arrangement ( ) for a tool ( ), has a coolant and flushing agent ( ) in a closed storage tank ( ), which is connected to a suction pump ( ) and has a closed flushing circulation system ( ) running from the storage tank ( ) through a filter ( ), connected via a pressure pump ( ) and through a collecting member ( ) associated with the tool ( ), with a suction line ( ) running back to the storage tank ( ). A reservoir circulation system ( ) for the coolant and flushing agent ( ), contains a reservoir ( ) connected to the storage tank ( ) via a float valve ( ) situated in the storage tank ( ), and is connected at another location in the flushing circulation system ( ) to the reservoir ( ) via a valve ( ).

Cooling and flushing means for tools used for working rock

A piston pump comprised of a cylinder ( ), an automatically closing intake valve ( ) to a pump chamber ( ), a sealing reciprocating piston ( ) and a sealing upstream filter piston ( ), wherein the piston ( ) together with the filter piston ( ) are elastically spring-biased and axially limitedly moveable and form together with the filter piston ( ) an automatically closing discharge valve ( ).

Piston pump with piston spring-biased to filter piston

A suction module for an electrical hand-held power too land including a housing ( ) at least partially receivable in the battery-receiving chamber ( ) of the power tool ( ) in the power tool, electrical conductors ( ) for connecting the module housing ( ) with a power source ( ), battery contacts ( ) for electrically connecting the module housing with the power tool ( ), an aspirator ( ) having a drive motor ( ) for producing vacuum and located in the module housing ( ), with the aspirator ( ) being connectable with a suction head ( ) arrangeable in a region of a working tool.

Growing community of inventors

Kaufering, Germany

Rory Britz