The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 2007
Filed:
May. 10, 2002
Fumio Takahashi, Tokyo, JP;
Fumio Takahashi, Tokyo, JP;
Bridgestone Corproation, Tokyo, JP;
Abstract
To provide a pneumatic tire in which noise can be reduced without changing the basic design of the block pattern, a chamfered portionis provided at a tire widthwise-direction outer side endA of a leading edgeA of a block. When the tire rolls and the blockcontacts a road surface, first, with respect to the leading edgeA, a flat portioncontacts the ground, and then the chamfered portioncontacts the ground. Because the height of the chamfered portiongradually decreases towards the tire widthwise-direction outer side end, the leading edgeA at the chamfered portiongradually makes contact with the road surface, whereby force input that generates sound is dispersed in terms of input timing and it is possible to suppress the generation of noise (mainly a striking sound) at the initial state of the blockcontacting the road surface. Furthermore, by changing the tire widthwise-direction position of the flat portionin a tire circumferential direction, it is possible for the entire block to gently receive stress generated at the time of rolling, whereby it is possible to suppress the level of noise generated by the blockat the time the blockcontacts the ground at a low level.