Anti-skid member and tire equipped with the anti-skid member

• US 6,199,610 B1
• Filed: 06/01/1998
• Issued: 03/13/2001
• Est. Priority Date: 10/09/1996
• Status: Expired due to Fees

• Current Assignee: Goichi Rubber Company Limited
• Original Assignee: Goichi Rubber Company Limited
• Inventors: Yanagawa, Koichi
• Primary Examiner(s): Maki, Steven D.
• Application Number:
  US09/077,568
• Time in Patent Office: 1,016 Days
• Field of Search: 152/210, 152/211, 152/212, 152/209.5, 36/59.A
• US Class Current: 152/209.5
• CPC Class Codes: B60C 11/16 of plug form, e.g. made from metal, textile
• CPC Class Codes: B60C 11/1618 actuated by temperature, e.g. by means of temperature sensitive elements

Abstract

An antiskid device (A) mounted to a tread (20) of a tire (2) has a pin (10) and a heat insulating member (11) attached to an end of the pin (10). The pin (10) is made of a material having a higher hardness in a first temperature range not higher than a predetermined temperature and a lower hardness in a second temperature range above the predetermined temperature. The insulating member (11) prohibits heat transfer from the tire (2) to the pin (10).

Claims

1. An antiskid device comprising:

a pin portion formed of a resin having a higher hardness in a first temperature range not higher than a predetermined temperature and a lower hardness in a second temperature range above the predetermined temperature; and

a heat insulating portion provided at one end of the pin portion and formed of said resin mixed with a heat insulating material;

wherein the pin portion and the heat insulating portion are formed integrally by simultaneous molding.

2. The antiskid device according to claim 1, wherein the resin is prepared by plasticizing polynorbornene with an aromatic oil.

3. The antiskid device according to claim 1, wherein the heat insulating material is cork.

4. The antiskid device according to claim 1, wherein the heat insulating material is asbestos.

5. The antiskid device according to claim 1, wherein the heat insulating material is a mixture of cork and asbestos.

6. An antiskid tire having a tread provided with antiskid devices,

wherein each of the antiskid devices comprises a pin portion formed of a resin having a higher hardness in first temperature range not higher than a predetermined temperature and a lower hardness in a second temperature range above the predetermined temperature, and a heat insulating portion provided at a base end of the pin portion and formed of said resin mixed with a heat insulating material, the pin portion and the heat insulating portion being formed integrally by simultaneous molding.

7. The antiskid tire according to claim 6, wherein the tread of the tire includes a recess for receiving each of the antiskid devices, the pin portion having a tip which is generally flush with or slightly retracted from a surface of the tread.

8. The antiskid tire according to claim 6, wherein the pin portion has a higher hardness than the tread in the first temperature range and a lower hardness than the tread in the second temperature range.

9. An antiskid tire having a tread provided with first antiskid devices and second antiskid devices:

wherein each of the first antiskid devices comprises a pin portion formed of a resin having a higher hardness than the tread in a first temperature range not higher than a predetermined temperature and a lower hardness than the tread in a second temperature range above the predetermined temperature, and a beat insulating portion at a base end of the pin portion and formed of said resin mixed with a heat insulating material, the pin portion and the heat insulating portion being formed integrally by simultaneous molding; and

wherein each of the second antiskid devices comprises a pin made of a rubber having a higher hardness than the tread in the first and the second temperature ranges.