B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
152/78.4
B60C 17/06 (2006.01)
Patent
CA 1213818
ABSTRACT The base part of an emergency running ring manufactured from an elastomer material changes into two upwardly inclined, outwardly directed support pieces having a high load capacity. The support pieces enclose a drop-base, groove-shaped annular channel and have a stepped outer flank. At least one annular groove filled directly or indirectly with a lubricant and closed by sealing lips communicating with the annular channel through at least one sealing lip forming the load end of the associated lever-like support piece. In intact pneumatic tires the sealing lips are held in the closed position on account of the nip pressure prevailing in the base part and, if necessary, through additionally inserted expanding fillers, but with the onset of the emergency running are opened by the wheel load acting on the support pieces, whereby the lubricant is released and reaches the contiguous surfaces between the pneumatic tire and the emergency running ring for lubrication. This emergency running ring is characterized above all by the fact that it has a low weight and offers the defective pneumatic tire a wide support surface. In addition, its outwardly directed support pieces advantageously support the flanks of the pneumatic tire when they are subjected to the effect of transverse forces when cornering. This emergency running ring is particularly suited for assembly in tubeless pneumatic tires for heavy road vehicles having two-part or multipart flat-base or steep shoulder rims of a large width.
462004
Piepenbrink Ulrich
Stein Hermann
Fetherstonhaugh & Co.
Vorwerk & Sohn Gmbh & Co. Kg
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