Universal caster
AssigneeTaikoh Co., Ltd.
InventorYasuharu Asai
Life of this patent
Estimating the term…
Abstract
A universal caster is provided that, with a hand truck, for loading and transporting a heavy substance. The universal caster includes a lower stage turning part A being mounted to an upper stage supporting shaft in the upper stage turning part B, thereby being made turnable with respect to the upper stage turning part; and a universal metal fitting that pivotally supports a wheel, being mounted to a lower stage supporting shaft in the lower stage turning part, thereby being made turnable with respect to the lower stage turning part, the lower stage supporting shaft being disposed in a displaced manner in a horizontal direction from the upper stage supporting shaft, and the wheel being supported by the wheel shaft through one or a plurality of rows of spiral springs.
Claims6
A universal caster, comprising:
- turning parts at upper and lower two stages, the lower stage turning part being mounted to an upper stage supporting shaft in the upper stage turning part, thereby being made turnable with respect to said upper stage turning part, and
- a universal metal fitting that pivotally supports a wheel, having a pair of bifurcated leg parts and being mounted to a lower stage supporting shaft in said lower stage turning part, thereby being made turnable with respect to said lower stage turning part,
- said lower stage supporting shaft being disposed in a displaced manner in a horizontal direction from said upper stage supporting shaft, and being disposed in a displaced manner in a horizontal direction from a vertical line passing through a wheel shaft of said universal metal fitting, and
- said wheel being supported by the wheel shaft through one row of spiral spring or a plurality of rows of spiral springs;
- wherein said spiral spring is loaded between the outer circumferential surface of a shaft cylinder that is rotatably disposed through bearings disposed in a portion located inside of the pair of bifurcated leg parts of said universal metal fitting for said wheel shaft, and the inner circumferential surface of said wheel.
A universal caster, comprising:
- turning parts at upper and lower two stages, the lower stage turning part being mounted to an upper stage supporting shaft in the upper stage turning part, thereby being made turnable with respect to said upper stage turning part, and
- a universal metal fitting that pivotally supports a wheel, having a pair of bifurcated leg parts and being mounted to a lower stage supporting shaft in said lower stage turning part, thereby being made turnable with respect to said lower stage turning part,
- said lower stage supporting shaft being disposed in a displaced manner in a horizontal direction from said upper stage supporting shaft, and being disposed in a displaced manner in a horizontal direction from a vertical line passing through a wheel shaft of said universal metal fitting, and
- said wheel being supported by the wheel shaft through one row of spiral spring or a plurality of rows of spiral springs, and
- said spiral spring is loaded between the outer circumferential surface of a rotary barrel that is fixed to said wheel shaft pivotally supported by bearings disposed on the outside faces of the pair of bifurcated leg parts of said universal metal fitting, and the inner circumferential surface of said wheel.
Dependencies are inferred from the claim text.