United States Patent [191 [11] 4,340,104 Kuan [45] Jul
United States Patent [191 [11] 4,340,104 Kuan [45] Jul. 20, 1982 3,739,829 6/1973 Powell et a1. ................. .. 152/330 R [54] DEFLATED TIRE LUBRICANT 3,850,217 11/1974 Edwards et a1. 152/330 RF [75] Inventor: Tiong H. Kuan, Stow, Ohio 3,931,843 l/ 1976 Edwards et al. .. 4,045,362 8/1977 Kuan et a1. [73] Assignee: The General Tire & Rubber Company, 4,057,092 11/1977 Tracy .......... .. .. l52/379.l Akron, Ohio 4,096,898 6/1978 Mosserly et a1. .... .. [21] Appl. No.: 134,832 Primary Examiner—John E. Kittle [22] Filed: Mar. 28, 1980 [57] ABSTRACT . Related US. Application Data To facilitate relative movement between thelinternal surfaces of a pneumatic tire which come into contact [63] Continuation of Ser. No. 920,673, Jun. 30, 1978, aban when the tire is run in a de?ated condition, the interior doned. of the tire is coated with a lubricant which does not [51] Int. Cl.3 ....................... .. B60C 17/00; B60C 5/12 ?ow at normal tire operating temperatures. The matrix [52] US. Cl. .............................. .. 152/330 L; 152/347; of the lubricant is a polyester, polyurea or polyurethane ' 252/51.5 A; 252/56 R; 252/56 S which does not begin to flow until the tire reaches a [58] Field of Search ............. .. 152/152, 330 R, 330 L, temperature of from 65° C. to 150° C. If the lubricant 152/330 RF, 347, 374; 156/115; 252/51.5 A, 56 were allowed to flow at operating temperatures, it S, 56 R would adversely effect the balance and performance of p [56] References Cited the tire.
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