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US 4,727,917 AGranted
Alternating lug tire
AssigneeThe Firestone Tire & Rubber Company
InventorDavid L. Stewart
Life of this patent
Estimating the term…
Abstract
An off-the-highway vehicle tire employing long and short lugs alternately disposed about the periphery in a substantially symmetric manner whereby lugs from each side of the tire strike the ground substantially simultaneously thereby minimizing side forces.
Claims4
An off-the-highway vehicle tire comprising:
- (a) carcass means having a tread area for receiving a tread means;
- (b) tread means comprising:
- (i) a first lug extending transverse to a mid-circumferential line about said tire, said first lug extending from the edge of said tread area through said mid-circumferential line, and
- (ii) a second lug extending transverse to a mid-circumferential line about said tire said second lug extending from the opposite edge of said tread area to a point short of said mid-circumferential line of said tire, wherein said second lug is disposed directly opposite said first lug such that said first and second lugs are substantially symmetrical about said mid-circumferential line;
- (c) tie bar means disposed between said first and second lugs, wherein said first lug is at a substantially constant angle with respect to said mid-circumferential line.
2 more elements
In an off-the-highway vehicle tire having a plurality of alternating short and long lugs oppositely disposed about the periphery of said tire, having a mid-circumferential line, the improvement comprising:
- (a) substantially symmetrical positioning of said short and long lugs about said mid-circumferential line;
- (b) tie bar means disposed between said short and long lugs, wherein a substantial portion of one of said lugs is directly opposite a portion of one of said long lugs, said portions of said short and long lugs being equidistant from said mid-circumferential line, and wherein said long lug is at a substantially constant angle with respect to said mid-circumferential line.
A pneumatic tire for tractors and like vehicles comprising:
- (a) a casing;
- (b) a first set of lugs disposed about the periphery of said casing and angularly disposed with respect to the mid-circumferential line of said casing and extending from the shoulder of said casing to a point on the same side of said mid-circumferential line, wherein said lugs are at a substantially constant angle with respect to said mid-circumferential line;
- and
- (c) a second set of lugs alternately disposed between each of said lugs of said first set of lugs and disposed about the periphery of said casing angularly disposed with respect to the mid-circumferential line of said casing and extending through said mid-circumferential line, wherein said lugs are at a substantially constant angle with respect to said mid-circumferential line whereby oppositely disposed adjacent first and second lugs provide substantially the same contact surfaces.
1 more element
Dependencies are inferred from the claim text.