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

Claim 2:
3. The payload transportation device of claim 2, wherein the first power transmission portion comprises rotational shafts (231-1, 231-2) rotated by the driving force of the lift-driving unit (210), cam members (232, 233) rotated by the rotational shafts (231-1, 231-2), and lifting members (235, 236) configured to linearly move upward or downward due to rotations of the cam members (232, 233), and
wherein the second power transmission portion comprises rotational shafts (251-1, 251-2) rotated by the driving force of the lift-driving unit (210), cam members (252, 253) rotated by the rotational shafts (251-1, 251-2), and lifting members (255, 256) configured to linearly move upward or downward due to rotations of the cam members (252, 253).