Invention Grant
US08146631B2 Pneumatic tire and method of producing the same as well as tire curing mold
有权
气动轮胎及其制造方法以及轮胎硫化模具
- Patent Title: Pneumatic tire and method of producing the same as well as tire curing mold
- Patent Title (中): 气动轮胎及其制造方法以及轮胎硫化模具
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Application No.: US12414023Application Date: 2009-03-30
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Publication No.: US08146631B2Publication Date: 2012-04-03
- Inventor: Yuji Tomatsu
- Applicant: Yuji Tomatsu
- Applicant Address: JP Tokyo
- Assignee: The Yokohama Rubber Co., Ltd.
- Current Assignee: The Yokohama Rubber Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Greer, Burns & Crain, Ltd.
- Priority: JP2008-105958 20080415
- Main IPC: B29C33/42
- IPC: B29C33/42 ; B29D30/52 ; B60C11/12

Abstract:
Provided are a pneumatic tire, a method of producing the pneumatic tire, and a tire curing mold, with which decrease in wet performance of a pneumatic tire in a worn state can be effectively prevented while chipping of land portions such as blocks is prevented in releasing the tire from a mold. The pneumatic tire of the present invention includes: a tread portion provided with groove portions and land portions; and sipes provided in the land portions. Each of the sipes has at least one end, in a longitudinal direction, being terminated within the corresponding land portion. Each sipe is provided with: a first offset portion protruding toward one side in a sipe thickness direction; and a second offset portion protruding toward the other side in the sipe thickness direction at a position on an inner side, in a tire radial direction, of a position at which the first offset portion protrudes. For each sipe, a sipe length (L2) in a worn state is set to be substantially the same as a sipe length (L1) in an original state, and a sipe path length (M2) in the worn state is set to be larger than a sipe path length (M1) in the original state. The method of producing a pneumatic tire of the present invention and the tire curing mold are used for producing the pneumatic tire.
Public/Granted literature
- US20090255616A1 PNEUMATIC TIRE AND METHOD OF PRODUCING THE SAME AS WELL AS TIRE CURING MOLD Public/Granted day:2009-10-15
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