Title:
PNEUMATIC TIRE FOR HEAVY LOAD
Document Type and Number:
WIPO Patent Application WO/2012/033121
Kind Code:
A1
Abstract:
The present invention addresses the problem of improving bead durability and rolling resistance performance. [Solution] Provided is a heavy load pneumatic tire (1) with a carcass (6) having a carcass ply (6A) which is extended from a tread portion (2) through a sidewall portion (3) and then folded over around a bead core (5) in a bead portion (4). The bead core (5) has an inner surface (5a) extending along a bottom surface (4a) of the bead portion (4) in the radial direction of the tire. In a normal condition in which the tire is set on a normal rim (R) and charged to a normal internal pressure with no load and in a standard weight load condition in which the tire under the normal condition is loaded with a normal weight and grounded at a camber angle of zero degrees, an angle (θ1) formed between the inner surface (5a) of the bead core (5) and a rim sheet surface (13) of the normal rim (R) falls within 0 +/- 3 degrees.
Inventors:
TODOROKI DAISUKE (JP)
MAEHARA ATSUSHI (JP)
MAEHARA ATSUSHI (JP)
Application Number:
PCT/JP2011/070350
Publication Date:
March 15, 2012
Filing Date:
September 07, 2011
Export Citation:
Assignee:
SUMITOMO RUBBER IND (JP)
TODOROKI DAISUKE (JP)
MAEHARA ATSUSHI (JP)
TODOROKI DAISUKE (JP)
MAEHARA ATSUSHI (JP)
International Classes:
B60C15/02; B60C15/024; B60C15/04
Foreign References:
| JPH11129710A | 1999-05-18 | |||
| JP2005193868A | 2005-07-21 | |||
| JP2005186795A | 2005-07-14 | |||
| JP2000016034A | 2000-01-18 | |||
| JP2005178668A | 2005-07-07 | |||
| JP2002219913A | 2002-08-06 |
Other References:
See also references of EP 2599646A4
Attorney, Agent or Firm:
SUMITOMO Shintaro (JP)
Shintaro Sumitomo (JP)
Shintaro Sumitomo (JP)
Download PDF:
Claims: