Carbide studs for stability and motive traction of footwear
OwnerJames Lefgreninventor
Life of this patent
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Abstract
The present invention provides a traction device for a terrain engaging element. The traction device defines a stud having a head portion and a shank portion extending from the head portion and adapted to be secured into the terrain engaging element. A plurality of spherical carbide pellets are bonded together on and to surfaces of the head. The carbide pellets are provided in multiple layers extending across the head surface. The carbide pellets are provided in a stacked relationship to each other so that during use the carbide pellets are capable of being individually dislodged to reveal a carbide pellet of an underlying layer.
Claims20
A traction device comprising:
- a head adapted to be secured to a footwear sole, with a lower surface adapted to engage a ground surface;
- a plurality of equally sized spherical carbide pellets arranged upon the lower surface of the head in a plurality of layers;
- a brazing metal extending within interstices between adjacent spherical carbide pellets to secure the pellets to the lower surface of the head;
- and
- a plurality of air voids extending between adjacent pairs of said plurality of carbide pellets and rendering said plurality of layers porous.
A traction device comprising:
- a head having a curved lower surface for ground engagement and an upper surface for engagement with a footwear sole, with a plurality of heads being provided upon said footwear sole to enhance traction;
- a plurality of equally sized spherical carbide pellets arranged in multiple curved layers upon the lower surface of the head, with each of said curved layers conforming to said curved lower surface of the head;
- a brazing metal extending within interstices between adjacent spherical carbide pellets to secure the plurality of pellets to the head;
- and
- a plurality of air voids extending between adjacent pairs of said plurality of carbide pellets and rendering porous said multiple curved layers of carbide pellets.
A traction device comprising:
- a head defining an upper surface and a lower surface being adapted to engage a footwear sole, with said head defining a plurality of extension portions spaced from a center and separated by a plurality of notches;
- a plurality of spherical carbide pellets bonded to the upper surface of the head, with the plurality of pellets being separated into distinct groupings at outer portions of said plurality of extension portions;
- and
- a plurality of air voids extending between adjacent pairs of said plurality of carbide pellets and rendering porous multiple layers of carbide pellets.
Dependencies are inferred from the claim text.