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.
Universal caster
2019-04-30
Patent
Electronic Resource
English