Title:
HEAVY LOAD HIGH SPEED RADIAL TIRE
Document Type and Number:
Japanese Patent JPH01244902
Kind Code:
A
Abstract:
PURPOSE:To swell a crown part following the regular internal pressure charge so as to prevent the generation of a standing wave by improving its generation critical speed by respectively specifying a proportional relation or the like of each radius in each part of a tire. CONSTITUTION:Ratio of a radius RC100, passing through a regular crown point PC100 being a point on a tire equator C in a tread surface in the time of regular internal pressure charge, to a radius RC5, passing through a 5% crown point PC5 in the time of 5% regular internal pressure charge, is set to 1.06 or more. While the ratio of the radius RC100 to a difference, between the radius RC100 and a radius RS100 passing through a regular shoulder point PS100 being a point in an end edge in the tire axial direction of a crown part 20 in the tread surface in the time of regular internal pressure charge, is set to 0.02 or more. Further the tread surface is formed into a mid-swollen shape where the radius RC5, passing through the 5% crown point PC5, is larger than a radius RS5 passing through a 5% shoulder point PS5.
Inventors:
NOMA HIROYUKI
KAWAMURA KAZUHIKO
NISHIDA YASUO
KAMIYOKO KIYOSHI
KAWAMURA KAZUHIKO
NISHIDA YASUO
KAMIYOKO KIYOSHI
Application Number:
JP2825589A
Publication Date:
September 29, 1989
Filing Date:
February 06, 1989
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
B60C3/04; B60C9/08; B60C11/00; (IPC1-7): B60C3/04
Domestic Patent References:
| JPS533124A | 1978-01-12 | |||
| JPS58112804A | 1983-07-05 | |||
| JPS5442481A | 1979-04-04 | |||
| JPS57147901A | 1982-09-13 |
Attorney, Agent or Firm:
Naemura Tadashi