e-caster9-1

e-caster7-2
e-caster9-2
e-caster9-3

caster9-3-2
The force in the horizontal direction balances with the reaction force from the step
The reaction force from the step hinders overtaking action

e-caster9-4

Mechanism for effectively utilizing the reaction force from the step
Mechanism for reducing the burden at the start of operation

caster9-3-4
We call the developed caster a step over climbing caster