US 9,809,067 B2
Air maintenance tire
Carolin Anna Welter, Schleich (DE); Andreas Frantzen, Trier (DE); Jeannot Frieden, Uebersyren (LU); Anne Therese Peronnet-Paquin, Luxembourg (LU); Stephan Rodewald, Canal Fulton, OH (US); Joseph John Kulig, Tallmadge, OH (US); and Mingliang Du, Copley, OH (US)
Assigned to The Goodyear Tire & Rubber Company, Akron, OH (US)
Filed by The Goodyear Tire & Rubber Company, Akron, OH (US)
Filed on Nov. 21, 2014, as Appl. No. 14/549,967.
Claims priority of provisional application 61/915,678, filed on Dec. 13, 2013.
Claims priority of provisional application 61/915,686, filed on Dec. 13, 2013.
Prior Publication US 2015/0165842 A1, Jun. 18, 2015
Int. Cl. B60C 23/12 (2006.01); B60C 13/02 (2006.01); B60C 1/00 (2006.01); C08K 5/39 (2006.01); C08K 5/3415 (2006.01); C08K 5/01 (2006.01); C08K 5/103 (2006.01); C08L 21/00 (2006.01)
CPC B60C 23/12 (2013.01) [B60C 1/0025 (2013.01); B60C 13/02 (2013.01); C08K 5/01 (2013.01); C08K 5/103 (2013.01); C08K 5/3415 (2013.01); C08K 5/39 (2013.01); C08L 21/00 (2013.01)] 18 Claims
 
1. A self-inflating tire assembly comprising:
a rim having a tire mounting surface extending between first and second rim flanges;
a tire mounted to the rim tire mounting surface, the tire having a tire cavity, first and second sidewalls extending respectively from first and second tire bead regions to a tire tread region;
the first sidewall having at least one bending region operatively bending within a rolling tire footprint responsive to a bending strain, whereby the bending region in a bending condition within said rolling tire footprint having a bending strain neutral axis, a compression side of the neutral zone, and an elongation side of the neutral zone;
a sidewall groove positioned within the compression side of the neutral axis of the one said bending region of the first tire sidewall;
an air tube positioned within the sidewall groove in contacting engagement with opposite groove surfaces at least partially surrounding the air tube, the sidewall groove operatively bending within the bend region responsive to the bending strain within the rolling tire footprint to compress the air tube from an expanded diameter to a flat diameter adjacent the rolling tire footprint, whereby forcing evacuated air from a flattened air tube segment along the air passageway;
the opposite groove surfaces comprising a rubber composition, the rubber composition comprising:
a diene based rubber;
from 0.25 to 5 parts by weight, per 100 parts by weight of rubber (phr), of castor oil; and
from 1 to 15 parts by weight, per 100 parts by weight of rubber (phr), of a vulcanization modifier selected from the group consisting of α,ω-bis(N,N′-dihydrocarbylthiocarbamamoyldithio)alkanes, bismaleimides, and biscitraconimides.