Back to results
US 4,230,269 AGranted
Traction device
OwnerJoseph Uchanskiinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerJoseph Uchanskiinventor
Estimating the term…
The traction device is adapted to be placed under the slipping wheel of a vehicle which is disabled for lack of traction as a result of the slipping wheel being unable to develop any driving torque on top of snow, ice, mud or other slippery surface. Generally, the traction device possesses a body having rectangular shape and provided with a narrow elongated tongue to facilitate the insertion of the device underneath the slipping wheel. The device is provided with protrusions randomly disposed over the body so as to improve frictional engagement between the device and the slippery surface of the road. Additionally, the leading edge of the tongue is provided with protuberances which are adapted to engage with the surface of the slipping wheel to assist in the engagement of the device with the slipping wheel. The device is manufactured from a one-piece flat sheet of expanded metal having a plurality of elongated hexagonally-shaped interstices interconnected by bridges having slanting surfaces having sharp edges which are directed into the surfaces of both the slipping wheel and the road so as to oppose the movement of the traction device with respect to the wheel and the road.
A device for improving traction underneath a slipping wheel of a vehicle disabled on a slippery road surface, comprising a body of substantially rectangular sheet of expanded metal sheet, and an elongated tongue extending from one of the transverse edges of said sheet to initiate interengagement between the surface of said slipping wheel and said road surface, said body including a plurality of randomly spaced protrusions, each being located along an individual line parallel to the longitudinal axis of said body, each line being spaced from an adjoining line by a distance which is at least equal to the width of the protrusion, said sheet having a wheel engaging surface and a road engaging surface.
A device for improving traction underneath a slipping wheel of a vehicle disabled on a slippery road surface, comprising a body of substantially rectangular sheet of expanded metal sheet, and an elongated tongue extending from one of the transverse edges of said sheet to initiate interengagement between the surface of said slipping wheel and said road surface, said body including a plurality of randomly spaced protrusions, each being located along an individual line parallel to the longitudinal axis of said body, each line being spaced from an adjoining line by a distance which is at least equal to the width of the protrusion, said body further being provided with reinforced perimetrical edges and said tongue being provided with reinforcements along the longitudinal perimetrical edges, said sheet having a wheel engaging surface and a road engaging surface.
A device for improving traction underneath a slipping wheel of a vehicle disabled on a slippery road surface, comprising a body of substantially rectangular sheet of expanded metal sheet, and an elongated tongue extending from one of the transverse edges of said sheet to initiate interengagement between the surface of said slipping wheel and said road surface, said sheet having a wheel engaging surface and a road engaging surface, said body including a plurality of randomly spaced protrusions, each being located along an individual line parallel to the longitudinal axis of said body, each line being spaced from an adjoining line by a distance which is at least equal to the width of the protrusion, said body being provided with reinforced perimetrical edges, said tongue being provided with reinforcements along the longitudinal perimetrical edges, and said tongue having a leading edge provided with wheel surface engaging members, said protrusions being in the form of dimples, a reinforcing washer secured within each dimple, said wheel surface engaging members being in the form of prongs developed from the body of the expanded metal sheet and turned out of the plane of said wheel engaging surface, said expanded metal sheet comprising a plurality of adjoining elongated hexagonally shaped interstices, said adjoining interstices being interconnected by bridges, said bridges having slanted surfaces terminating in sharp edges and defining said wheel engaging and road engaging surfaces, the slanted surfaces being canted towards said road engaging surface in the direction of said tongue.
Dependencies are inferred from the claim text.