Federal-mogul Burscheid Gmbh

Ernst Thielenhaus Gmbh & Co. Kg

Marc Stephan Klopp

Martin Wolters

Harald Goldau

Jens Picard

Frank Horn

Ulrich Lenhoff

A device for measuring edge and rounding features on a piston ring includes a planar support element for the piston ring, a stop operatively connected thereto for bearing defined piston ring sections thereon, and a measuring unit, which is disposed at a predefinable angle with respect to the support element or the stop.

Equipment for measuring piston rings

A method for finishing a valve seat for ball valves, in particular for fuel injection valves in internal combustion engines. The workpiece to be finished and a finishing tool are driven in an opposite direction of rotation, whereby the axes of rotation of the workpiece and the finishing tool are aligned with each other at an angle of from 1&deg; to 10&deg;. The finishing tool rests against the inside surface of the workpiece to be finished over its entire circumference. The surface of the workpiece to be treated is provided with a crowned shape. A finishing stone with a wear-resistant and preferably cone-shaped working surface is employed as the finishing tool, whereby a narrow sealing zone with a convex contour in the longitudinal section is produced in the crowned surface of the workpiece by partial removal of material.

Method of finishing a valve seat for ball valves, in particular for fuel injection valves in internal combustion engines

Growing community of inventors

Radevormwald, Germany

Marc Stephan Klopp