STUDDED VEHICLE TIRE

• US 3,566,948 A
• Filed: 02/28/1969
• Issued: 03/02/1971
• Est. Priority Date: 03/01/1968
• Status: Expired due to Term

• Current Assignee: N/A
• Original Assignee: N/A
• Time in Patent Office: 732 Days
• US Class Current: 152/210
• CPC Class Codes: B60C 11/0306 Patterns comprising block rows or discontinuous ribs
• CPC Class Codes: B60C 11/0311 Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
• CPC Class Codes: B60C 11/1625 Arrangements thereof in the tread patterns, e.g. irregular

Abstract

A pneumatic vehicle tire having a tread strip and a plurality of groups of skid protective studs of hard metal respectively arranged in said tread strip along different circumferential zones and protruding outwardly from said tread strip, said circumferential zones when viewing the tire in transverse direction thereof being located one behind the other, the wear resistance of the studs of at least one group being different from the wear resistance of the studs of at least another one of said groups.

Claims

1. A pneumatic vehicle tire having a tread strip and a plurality of groups of skid protective studs of hard metal respectively arranged in said tread strip along different circumferential zones and protruding outwardly from said tread strip, said circumferential zones when viewing the tire in transverse direction thereof being located one behind the other, the improvement therewith comprising the wear resistance of the studs of at least one group being different characteristically from the wear resistance of the studs of at least another one of said groups.

2. An improvement in a tire according to claim 1, which includes groups of skid protective studs near the marginal tread strip areas and also includes at least one group of skid protective studs transversely between the groups of studs near the marginal tread strip areas, the studs of the groups near said marginal areas having more wear resistance than the studs between said last mentioned groups.

3. An improvement in a tire according to claim 2, in which the studs of the greater wear resistance have a Vickers hardness of from 1300 to 1400 particularly whereas the studs of less wear resistance have a Vickers hardness of from 1200 to 1300.

4. An improvement in a tire according to claim 2, in which the difference in hardness between the studs of greater and lower wear resistance amounts to from 80 to 120 Vickers units.

5. An improvement in a tire according to claim 1, in which the studs of different wear resistant material always have approximately the same diameter.

6. An improvement in a tire according to claim 1, in which the studs of one group differ in transverse cross section from the studs of an adjacent group of studs.