RUN-FLAT DEVICE
First Claim
Patent Images
1. A run-flat device for use with a pneumatic tire comprising:
- an inner ring having an axis of rotation, the inner ring comprising at least two annular pieces;
a deformable outer ring comprising at least two annular pieces; and
a flexible interconnected web extending between the inner and outer ring and comprising at least two annular pieces, the interconnected web comprising at least two radially adjacent layers of web elements at every radial cross-section of the run-flat device, the web elements defining a plurality of generally polygonal openings and comprising at least one radial web element that is angled relative to a plane that extends radially through the axis of rotation;
wherein a substantial amount of load is supported by a plurality of the web elements working in at least in part tension when the run-flat device is in direct contact with the ground.
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Accused Products
Abstract
A run-flat device, which is inserted into pneumatic tires to allow mobility in the event of pressure loss in the pneumatic tire, can comprise an inner ring, outer ring, and an interconnected web connecting the two. The run-flat device can support an applied load by working in tension and compression.
99 Citations
25 Claims
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1. A run-flat device for use with a pneumatic tire comprising:
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an inner ring having an axis of rotation, the inner ring comprising at least two annular pieces; a deformable outer ring comprising at least two annular pieces; and a flexible interconnected web extending between the inner and outer ring and comprising at least two annular pieces, the interconnected web comprising at least two radially adjacent layers of web elements at every radial cross-section of the run-flat device, the web elements defining a plurality of generally polygonal openings and comprising at least one radial web element that is angled relative to a plane that extends radially through the axis of rotation;
wherein a substantial amount of load is supported by a plurality of the web elements working in at least in part tension when the run-flat device is in direct contact with the ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A pneumatic tire comprising:
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a rim; an annular inner ring coupled to the rim; an interconnected web coupled to the inner ring, the interconnected web comprising a plurality of polygonal shaped web elements and openings, the polygonal shaped web elements being stronger in tension than in compression; an annular outer ring attached to the interconnected web on a side of the interconnected web opposite that of the annular inner ring, the annular outer ring comprising a deformable material; and an external pneumatic tire operatively coupled to the rim. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification