Resilient tires and wheels – Tires – resilient – Patches
Patent
1974-06-11
1976-03-30
Hoffman, Drayton E.
Resilient tires and wheels
Tires, resilient
Patches
152353R, 152185, B60C 500
Patent
active
039467848
ABSTRACT:
In the case of a retreading operation a conventional symmetrical tire casing is prepared for retreading by buffing the outer peripheral or crown portion of the casing and the outer peripheral portions of both side wall portions of the casing adjoining the crown portion are also buffed. In addition, one side wall portion of the casing is buffed to a point closely adjacent the bead portion thereof and the buffed portions of the tire casing then have cement applied thereto in a conventional manner prior to the application of a retread rubber strip or strips to the cemented portions of the buffed tire casing. Thereafter, the tire casing, with the retread rubber applied thereto is cured in the usual manner. The retread rubber overlying the one fully buffed side wall of the tire casing is generally radially straight and the other side of the retread rubber applied to the buffed outer peripheral portions of the other side wall of the tire casing is generally flush with the area of maximum width of that side wall of the casing, whereby the outer peripheral surface of the retreaded tire casing is generally twice the width of the crown portion of the casing. Further, the outer peripheral surface of the retreaded tire casing is generally cylindrical and thereby appreciably widens the ground contact area of the retreaded tire casing distributing the load of the vehicle portion supported therefrom over a greater area to thus reduce wear of the retreaded tire casing per unit of area of tread surface. In the case of new tire construction, a symmetrical tire casing is constructed in the usual manner and generally the same configuration of side wall and tread rubber is cured thereon in order to produce a wide laterally offset tread surface and an outer side wall which has a thicker covering of rubber than the inner side wall.
REFERENCES:
patent: 2240855 (1941-05-01), Phillips
patent: 2281359 (1942-04-01), Kennet
patent: 3554259 (1971-01-01), Webb
patent: R18638 (1932-10-01), Michelin
Hoffman Drayton E.
Jacobson Harvey B.
O#Brien Clarence A.
Skaggs H. Grant
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