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US 4,234,369 AGranted
Method for repairing and retreading vehicle tires
AssigneeVakuum Vulk Holdings Ltd.
InventorWilhelm Schelkmann
Life of this patent
Estimating the term…
Abstract
For use in repairing or retreading tires, particularly large tires for earth-moving equipment and the like, the portion to be repaired or retreaded is covered and surrounded by a flexible enclosure attached to the tire in gas-sealing relationship by an adhesive. The adhesive will remain effective even at the temperatures necessary for vulcanization. The enclosure has a gas connection so that it can be evacuated or pressurized to remove air and gas occlusions. A gasket can be used in conjuction with the adhesive.
Claims12
A method for repairing a void in a portion of a vehicle tire comprising the steps of:
- placing unvulcanized rubber in the void;
- covering and enclosing the unvulcanized rubber and at least the portion of the tire immediately surrounding the portion to be repaired with a flexible enclosure;
- attaching the edges of said enclosure to the tire around the portion to be repaired in gas-tight relationship by means of a plastically deformable adhesive that remains effective at the elevated temperature necessary for complete vulcanization of the unvulcanized rubber;
- applying gas pressure conditions to the space between said enclosure and the tire so as to evacuate air and gas occlusions from the space and apply said enclosure tightly against the tire so that said enclosure deforms into tight fitting relationship with the surface contours of the tire;
- and
- heating the unvulcanized rubber placed in the void to raise its temperature and effect complete vulcanization thereof.
3 more elements
Dependencies are inferred from the claim text.