US 11,724,543 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. 17/563,450.
Claims priority of application No. 2021-001546 (JP), filed on Jan. 7, 2021.
Prior Publication US 2022/0212500 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)] 10 Claims
OG exemplary drawing
 
1. A pneumatic tire having a tread portion and a belt layer, wherein
the tread portion is arranged on an outer side of the belt layer in a tire radial direction, the belt layer includes reinforcing cords comprising monofilaments in which 50 lines/5 cm or more of the monofilaments are arranged in a tire width direction in a tire radial cross section of the belt layer, and a maximum load capacity of the tire WL (kg) and a weight of the tire WT (kg) satisfy the following formula 2
0.015≤(WT/WL)  formula 2
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.