Patent ID: 11904461
Assignee: MOTION DEVICE INC.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. The payload transportation device of claim 7, wherein the first coupler (227) comprises:
a plurality of internal pressurizing members (227-5, 227-6) configured to come into contact with outer surfaces of the pair of rotational shafts (226-1, 226-2) and to each have a wedge-shaped outer surface; and
a plurality of external pressurizing members (227-3, 227-4) having wedge-shaped inner surfaces to come into contact with the wedge-shaped outer surfaces of the internal pressurizing members (227-5, 227-6), and
wherein when the external pressurizing members (227-3, 227-4) are moved in an axial direction of the rotational shafts (226-1, 226-2), the internal pressurizing members (227-5, 227-6) pressurize the rotational shafts (226-1, 226-2) in a radial direction so that the pair of rotational shafts (226-1, 226-2) are coupled.