About 46 results
https://drivepatents.com/patents/1010375 · 10 Aug 2011
There is provided a pneumatic tire to improve on-ice braking performance. A pneumatic tire comprises plural blocks on a tread surface of the tire defined by plural circumferential grooves extending in a tread circumferential direction and plural lateral gr...
https://drivepatents.com/patents/1016086 · 2 Feb 2011
It is a problem to provide a pneumatic tire where disengagement between sipe wall surfaces is suppressed. In a sipe formed in a block of a tread portion, two ridge portions (32) and (34) are formed in one sipe wall surface (29P), and two valley portions th...
https://drivepatents.com/patents/1069651 · 1 Mar 2006
A pneumatic tire comprises a tread portion provided with blocks (5), the blocks are axially divided by at least one circumferential groove (3) and circumferentially divided by oblique grooves (4) inclined with respect to the tire axial direction towards on...
https://drivepatents.com/patents/1072793 · 9 Nov 2005
A pneumatic tire 110 comprising a tread portion 112 having a plurality of blocks 126, each of which blocks being defined into substantially a quadrilateral form by two pairs of main grooves each having a different angle with respect to an equatorial plane ...
https://drivepatents.com/patents/1073707 · 28 Sep 2005
The tire has a running strip with a profile, the profile positive of which is formed by a circumferential groove (3), transverse grooves (7), and such elements as profile blocks (2a) or circumferential running strip bands (1). The transverse grooves have a...
https://drivepatents.com/patents/1075962 · 13 Jul 2005
It is an object of the present invention to improve the running performance on snowy and icy roads, and for this purpose, blocks provided with sipes are formed at a tread portion. The sipes (9A,9B) include an open top (Up) end that opens at a block surface...
https://drivepatents.com/patents/1076543 · 29 Jun 2005
A pneumatic tire including a tread provided with a plurality of blocks. Tread surfaces of the blocks 18 are provided with second arcuate portions 20B, which have a center of curvature outside of the tire, at a leading edge 18f side and a trailing edge 18k ...
https://drivepatents.com/patents/1079797 · 2 Mar 2005
A pneumatic tire having a block pattern of a tread defined by a plurality of circumferential grooves (1,2) extending in a circumferential direction of the tread and a plurality of lateral grooves (3) each extending across the circumferential grooves to tre...
https://drivepatents.com/patents/1081877 · 8 Dec 2004
An end of a block 18 formed on a tread surface of a tire is chamfered in such a manner that a curvature of a chamfer increases toward the end of the block. Accordingly, a ground contact pressure which usually increases locally at the end of the block 18 is...
https://drivepatents.com/patents/1083135 · 20 Oct 2004
A wheel tread part 2 of a tread is constituted of a longitudinal main groove 3 formed in a circumferential direction via a center of a width direction, a plurality of longitudinal subgrooves 4 formed on both side parts of the longitudinal main groove 3 in ...