Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1987-07-16
1989-06-13
Simmons, David
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152167, 152211, B60C 1116
Patent
active
048383295
ABSTRACT:
A nonskid device for a tire, shoe sole or the like. The device comprises a stud that is embedded in a hole formed inwardly from the tread of the tire or shoe sole. The stud is a generally spherical or cylindrical body having an annular stud tip formed integrally therewith at one end thereof and is retained in the hole, either directly or via a cup, by an annular projection protruding inward from the wall of the hole. In normal slip-free travel, the stud tip does not project above the tread, and only the apex of the spherical or cylindrical body thereof is exposed at the plane of the tread. When the tread slips relative to the road surface, a force acts on the apex to cause the stud to rotate by a small angle. This causes the stud tip to rise beyond the plane of the tread and bite into the road surface. The stud tip thus comes into contact with the road surface only when required to prevent slipping, which, in the case of the device being applied to a vehicle tire, minimizes damage to the road and prevents pollution from road dust during normal driving.
REFERENCES:
patent: 2540045 (1951-01-01), Crooker
patent: 2572996 (1951-10-01), Dunlap
patent: 2696864 (1954-12-01), Crooker
patent: 2869311 (1959-01-01), Beeston, Jr.
patent: 3179147 (1965-04-01), Edsmar
patent: 3842880 (1974-10-01), Keinanen
patent: 3987831 (1976-10-01), Walrave et al.
patent: 4619301 (1986-10-01), Hiroki
Ohuchi Kiyoyuki
Shimizu Ken'ichi
Agency of Industrial Science and Technology
Ministry of International Trade and Industry
Simmons David
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