Firma Carl Freudenberg

Roland Ehmsen

Rolf Vogt

Herbert Schumacher

Ulrich Fruedenberg

Fritz Heck

Werner Trauth

A seal for a reciprocating rod, comprised of a sealing ring of elastomeric material, which is provided at its end facing away from the space to be sealed off with a recess that opens towards the rod and in the direction of the end, into which a guide ring is inserted. At a distance from the end, the guide ring is provided with one radially outwardly pointing projection which is snapped into the sealing ring. The sealing ring is undetachably secured to the guide ring during storage and assembly.

Seal for a reciprocating rod

A ferrofluid seal for a shaft comprising several sealing gaps concentrically arrayed about a shaft. Each gap is filled with ferrofluid liquid through a bore-hole. Each of the bore-holes is sealed and hydraulically isolated from the other bore-holes.

Growing community of inventors

Weinheim, Germany

Roland Ehmsen