Multicelled, tubeless safety tire with air activated snow and ice studs
OwnerAzel L. Crandallinventor
Life of this patent
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Abstract
An improved automobile tire that incorporates studs for engaging a roadway surface during times when covered by snow and especially by ice; the studs protruding from a narrow area around the tire which during normal use in non-icy weather is concave so to form an annular recess in order that the studs do not engage the roadway; the tire having a separate air cell just behind the annular recess which is inflatable during icy weather by a separate valve so to push outwardly the recess thus exposing the studs beyond the remainder of the tire outer periphery.
Claims3
A safety tire comprising an outer casing and an inner tube mounted in said casing, wherein the inner tube is spaced from said casing forming inner and outer air cells, including a traction air cell formed peripherally in said outer casing symmetrical about a vertical plane passing through the center of said tire, wherein said tire has a peripheral thread having a relatively, flexible center section encompassing said traction air cell and stiff adjacent thread portions, including spring means embedded in said center sections biasing said center section radially inward to assume a normally concave position relative to the adjacent thread portions, including air valves for the inner and outer cells and a separate air valve for said traction cell, wherein said tube and casing are joined between the inner air cell and the center section to provide a center wall completing the enclosure of said traction air cell, whereby inflation of said traction air cell causes the outward movement of the center section to assume a convex position, in further combination with studs mounted on said center section and protruding outwardly therefrom.
Dependencies are inferred from the claim text.