Invention Grant
- Patent Title: Pneumatic tire
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Application No.: US15778620Application Date: 2016-11-25
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Publication No.: US11241917B2Publication Date: 2022-02-08
- Inventor: Naruhiko Honda
- Applicant: The Yokohama Rubber Co., LTD.
- Applicant Address: JP Tokyo
- Assignee: The Yokohama Rubber Co., LTD.
- Current Assignee: The Yokohama Rubber Co., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Thorpe North & Western
- Priority: JPJP2015-231722 20151127
- International Application: PCT/JP2016/084932 WO 20161125
- International Announcement: WO2017/090715 WO 20170601
- Main IPC: B60C11/03
- IPC: B60C11/03 ; B60C11/12 ; B60C11/13

Abstract:
A pneumatic tire, includes: an annular-shape tread portion; a sidewall portions; and bead portions. JIS hardness of tread rubber is within a range of 40 to 60 and snow traction index is 180 or higher. A rib positioned between circumferential grooves is demarcated in a center region of the tread portion. Closed grooves are formed in the rib. The closed grooves are inclined with regard to a tire axial direction such that a closed end faces a leading side. A groove wall of the closed groove on the leading side protrudes more outward in the tire axial direction than a groove wall on a trailing side. A difference between angles θ1 and θ2 of the groove walls on the leading and trailing sides of the closed grooves, respectively, with regard to the tire axial direction is within a range of 0°≤θ1-θ2≤5°.
Public/Granted literature
- US20180354309A1 Pneumatic Tire Public/Granted day:2018-12-13
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