US 11,724,544 B2
Pneumatic tire
Momoka Misaki, Kobe (JP); Dong Miao, Kobe (JP); and Hiroki Kawai, Kobe (JP)
Assigned to SUMITOMO RUBBER INDUSTRIES, LTD., Kobe (JP)
Filed by SUMITOMO RUBBER INDUSTRIES, LTD., Kobe (JP)
Filed on Dec. 28, 2021, as Appl. No. 17/563,725.
Claims priority of application No. 2021-001533 (JP), filed on Jan. 7, 2021.
Prior Publication US 2022/0212502 A1, Jul. 7, 2022
Int. Cl. B60C 9/18 (2006.01); B60C 9/00 (2006.01); B60C 9/20 (2006.01); B60C 11/00 (2006.01); B60C 11/03 (2006.01); C08L 9/06 (2006.01); B60C 1/00 (2006.01)
CPC B60C 9/1821 (2013.01) [B60C 9/0064 (2013.01); B60C 9/20 (2013.01); B60C 11/0008 (2013.01); B60C 11/033 (2013.01); C08L 9/06 (2013.01); B60C 2001/0066 (2013.01); B60C 2009/2077 (2013.01); B60C 2009/2083 (2013.01); B60C 2011/0025 (2013.01); C08L 2205/03 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A pneumatic tire having a tread portion and a belt layer, wherein the tread portion is arranged on the outer side of the belt layer in the tire radial direction, and the belt layer includes reinforcing cords comprising monofilaments in which 50/5 cm or more of the monofilaments are arranged in the tire width direction in the tire radial cross section of the belt layer, and
the maximum load capacity of the tire WL (kg) and the weight of the tire WT (kg) satisfy the following formula 1
(WT/WL)≤0.0140  formula 1
wherein the maximum load capacity is a value calculated using the following two formulas based on the tire cross-sectional width Wt (mm), the tire cross sectional height Ht (mm), the tire outer diameter Dt (mm), the volume of the space occupied by the tire V (virtual volume) and the rim diameter (Dt/2−Ht) in a state wherein the tire is assembled on a regular rim, has an internal pressure of 250 kPa and is in a no load state,
V (mm3)={(Dt/2)2−(Dt/2−Ht)2}×π×Wt and
WL (kg)=0.000011×V+100.