Hilti Aktiengesellschaft

Oliver Koslowski

John Van Taack-Trakranen

Josef Schittl

Goran Golubovic

Bernhard Brehm

Markus Forstner

Egon Koenigbauer

Stefan Groer

Michael Fuchs

Konrad Lieb

Egon KÖNIGBAUER

A ring saw blade includes a flat annular support which has a side face and an outer circumference. One or more cutting elements are disposed along the outer circumference. An annular groove is recessed into the side face and has a radially inner flank and a radially outer flank. The radially inner flank is conical and a first cone describing the radially inner flank has a half opening angle of between 10 degrees and 30 degrees.

Ring saw blade

A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. A guide roller is disposed on a first side of the cutting plane where the ring saw blade is guidable by the guide roller from the first side. A guide roll is disposed on a second side of the cutting plane where the ring saw blade is guidable by the guide roll from the second side. The guide roll is disposed in a hood that is pivotable relative to the cutting plane.

Ring saw

A handheld core drilling device includes a tool receptacle where the tool receptacle has a receiving sleeve and a tool receiving piece disposed in the receiving sleeve. A compression spring arrangement is disposed within the receiving sleeve. Exactly three equally spaced retaining tabs are formed on the receiving sleeve along a circumferential direction and each retaining tab has a respective stop surface that faces the tool receiving piece. Exactly three equally spaced bearing surfaces are formed on the tool receiving piece along a circumference of the tool receiving piece and each bearing surface faces a respective stop surface. Each of the bearing surfaces includes a stud with a stud surface where the stud surfaces in a radial direction are at most half as wide as the bearing surfaces in the radial direction.

Electrical handheld core drilling device

A method to control a power tool (), especially a handheld core drilling machine, includes a drive () to drive a tool () and a control unit () for when a workpiece (W) is being processed. The method encompasses the following method steps: The power tool includes a drive () to drive a tool () and a control unit () to control at least the rotational speed of the drive.

Intuitive, adaptive drilling function

A process for controlling and a core drilling machine () having an electrical motor () for rotational drive of a core drill bit () having cutting edges () oriented axial to a work piece (), a feeding means () for generating the feed of the core drill bit () against the work piece () and having a controller () for controlling, relative to a first one-to-one control parameter, detected by a sensor (') for electrical power consumption (P) or torque (M). A force sensor (&#x2032;) is connected to the controller () for detecting the contact pressing force (F) of the core drill bit () as the second control parameter.

Feed adaptation core drill

An overload protection arrangement for a portable power tool includes a magnetic clutch () arranged in a drive train of the power tool between an electromotor () and a tool chuck (), control electronics () for controlling the magnetic clutch (), a self-actuated torque-dependent overload clutch () likewise arranged in the drive train, and a sensor () for detecting an open condition of the overload clutch () upon the overload of the drive train and connected with the control electronics ().

Growing community of inventors

Puergen, Germany

Oliver Koslowski