B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
26/190, 152/78.4
B60C 17/04 (2006.01) B60C 7/20 (2006.01) B60C 17/00 (2006.01)
Patent
CA 1195220
RUN-FLAT TIRE AND METHOD OF MAKING SAME ABSTRACT OF THE DISCLOSURE A run-flat pneumatic tire having an annular struc- tural compression element in the inside surface of the crown thereof, which compression element is stabilized by a multiplicity of closely spaced spoke-like radial ele- ments in the tire sidewalls such that de-pressurized op- eration of the tire without damage is possible. The com- pression element is a helix with closely spaced coils wound from a rod of a cross-sectional shape selected from various solid and tubular configurations. Round, square, and rectangular coil cross-sectional configurations are shown as are interlocking convex/concave, tongue/groove arrangements. Methods of installing the helical compres- sion element in the tire as by winding up the helix to reduce its diameter such that it can pass through the beads, or by introducing one end of an end coil of the helix over one of the beads into the interior of the tire and providing a relative rotation to feed the helix into the tire are taught. The compression element can be bonded in place and various means for preloading the in- stalled helix are also disclosed.
433371
Kopsco M. Alan
Markow Edward G.
Grumman Aerospace Corporation
Marks & Clerk
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