Hubless caster
View Patent ↗A hubless caster assembly includes a caster body and at least one wheel, the wheel comprising a toroidal member having a bearing race, and a complementary bearing race supported by the caster body. Bearing elements in the races support the wheel in free rotation. The caster body may comprise a ring body having an axial opening, whereby the caster assembly has a large central aperture extending entirely therethrough. A centering ring may be secured in the axial opening with the complementary bearing race formed therein. A hub cap with visual treatment may be secured over the central aperture.
1. A hubless caster assembly, including:
a body frame comprised of a generally planar member having a large diameter central bore extending therethrough, and a rod portion extending integrally and within the plane of said planar member,
a pair of centering rings, each having an neck portion and a flange annular portion extending from an outer annular edge of said neck portion;
each neck portion of said centering rings being secured in a respective end of said large diameter central bore of said body frame;
a pair of toroidal wheels, each having an inner annular surface extending concentrically about the neck portion of a respective centering ring and spaced apart therefrom;
a pair of bearing races, each formed in a respective one of said inner annular surfaces of said wheels; and,
a plurality of bearings disposed in said bearing races and engaged in rolling contact with each of said neck portions and the respective inner annular surface to support said wheels in independent, freely rotating fashion about said central bore.
2. The hubless caster assembly of claim 1 , wherein said body frame further includes an integral rod extending in the nominal plane of said planar member, and stacked assembly means joined to said integral rod to form a kingpin assembly.
3. The hubless caster assembly of claim 2 , wherein said stacked assembly means includes at least one bushing dimensioned to be secured about said integral rod.
4. The hubless caster assembly of claim 2 , wherein said stacked assembly means includes at least one retaining ring dimensioned to be secured about said integral rod.
5. The hubless caster assembly of claim 2 , wherein said stacked assembly means includes an outer cylindrical configuration dimensioned to be secured in a furniture kingpin receptacle, whereby the caster assembly is free to rotate about the axis of the kingpin receptacle.
6. The hubless caster assembly of claim 1 , wherein said plurality of bearings includes a plurality of rollers.
7. The hubless caster assembly of claim 1 , wherein each of said wheels includes an inner flange extending from an inner annular surface, said inner flange retaining each wheel on the respective centering ring.
8. The hubless caster assembly of claim 1 , wherein said neck portion of each centering ring is secured in said central bore of said body frame by at least one of the following processes: press-fitting, bonding, or welding.
9. The hubless caster assembly of claim 2 , wherein said central bore, centering rings, neck portion, wheels, and bearing races all extend about a common axis of symmetry.
10. The hubless caster assembly of claim 9 , wherein said axis of symmetry is perpendicular to said generally planar member.
11. The hubless caster assembly of claim 10 , wherein said integral rod extends along a second axis that is perpendicular and non-intersecting to said axis of symmetry.
12. The hubless caster assembly of claim 1 , further including a decorative center cap adapted to be secured in at least one of said centering rings.