Hofmann Maschinenbau Gmbh

Gebr. Hofmann Gmbh & Co. Kg

Franz Ruppert

Joachim Schwab

Georg Lipponer

Manfred Maier

An apparatus for improving the fit of a pneumatic tire on a wheel comprises a plurality a conical pressure rollers. A first pair of pressure rollers with their larger diameter positioned downwardly are arranged diametrically opposite each other with respect to the axis of the tire. A second pair of pressure rollers with their larger diameter positioned upwardly are arranged similarly diametrically opposite the pressure rollers with their larger diameter upwardly are arranged alternately with pressure rollers with their larger diameter downwardly in the peripheral direction of the tire.

Apparatus for improving the fit of a tire on a wheel

In a rotor wheel assembly for a tire testing drum comprising a hub and a testing drum portion which is supported relative to the hub by support means, the support means consists exclusively of discs, with at least three discs arranged symmetrically relative to a central plane passing radially through the hub. The support discs may comprise first and second conical discs and at least one flat disc.

Rotor wheel assembly for a tire testing machine

An arrangement for measuring, in a tire testing machine, radial and axial forces at a wheel consisting of a pneumatic tire and a rim. The measuring axle, on which the wheel is rotatably disposed during the measuring run, has two cylindrical axle parts, of which the first, interior axle part is mounted so that it can be moved radially and frictionlessly in a straight line, and the second, exterior axle part, in axial direction, is frictionlessly located on the first axle part. For introduction of the axial forces, a first force measuring device is provided that is connected with a tension-compression rod that is rigidly connected with the second axle part, and for measuring the radial forces, a second force measuring device is connected between the base plate and the first axle part.

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Heppenheim, Germany

Franz Ruppert