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

Claim 11:
12. The payload transportation device of claim 1, wherein a pair of first driven wheels (343a, 343b) are coupled to a bottom surface of the first assembly (1),
wherein a pair of second driven wheels (344a, 344b) are coupled to a bottom surface of the second assembly (2),
wherein the driven wheel (343a) on one side and the driven wheel (343b) on the other side, which are included in the pair of first driven wheels (343a, 344b), are pivotable about a driven wheel central shaft (345) having a length in a direction perpendicular to hinge shafts (350a, 350b), and
wherein the driven wheel (344a) on one side and the driven wheel (344b) on the other side, which are included in the pair of second driven wheels (344a, 344b), are pivotable about a driven wheel central shaft (346) having a length in a direction perpendicular to the hinge shafts (350a, 350b).