Title:
LOW NOISE TIRE
Document Type and Number:
Japanese Patent JPS63159111
Kind Code:
A
Abstract:
PURPOSE:To reduce air-columnar resonant sound in a tire having a plurality of circumferential grooves, by providing point heights having a predetermined width at predetermined intervals along the lengthwise direction of the main grooves, and by specifying the length of sub-grooves. CONSTITUTION:In a section in which ribs 3 are sectioned by sub-grooves, point heights 3a having a width WS which is equal to 0.2 to 0.5 times as large as the width Wm of main grooves 1 are formed extending toward the main grooves, along the lengthwise direction of the main grooves 1 at intervals which are 0.1 to 0.4 times as large as the circumferential ground contact length of the tire. Further, the length (I) of sub-grooves 2 is less than one-half of the width L of the ribs 3 so that it extends to the intermediate position of each rib 3. Thus, the ribs 3 forming the main grooves 1 is made to be concave and convex, thereby it is possible to prevent noise due to air-columnar resonance without deteriorating the wet characteristic and the maneuvering characteristic of the tire.
Inventors:
HIBINO MASAYOSHI
Application Number:
JP30549886A
Publication Date:
July 02, 1988
Filing Date:
December 23, 1986
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD
International Classes:
B60C11/04; B60C11/12; (IPC1-7): B60C11/06
Domestic Patent References:
| JPS58191610A | 1983-11-08 | |||
| JPS61178205A | 1986-08-09 | |||
| JPS5654091U | 1981-05-12 |
Attorney, Agent or Firm:
Shinichi Ogawa