Patent ID: 11926470
Assignee: VALCO INDUSTRIES, INC.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 2:
3. The bin of claim 1, wherein the at least one lifting mechanism comprises at least one rotationally driven stepped cam and the drive comprises a motor for rotating the stepped cam; wherein:
the cam includes a cam surface, and a cam follower assembly that comprises two cam followers and a cam follower roller provided between the two cam followers, wherein the cam followers support the one of the plurality of support legs and are positioned above the stepped cam and in contact with the cam surface;
the cam follower roller is lower than or approximately tangential to the bottom surface of the cam followers, whereby the cam follower is in contact with the cam surface throughout at least a portion of the rotation of the stepped cam; and
the cam and the cam follower rollers are in rolling contact, thereby reducing the sliding friction between the cam surface and the cam follower when the stepped cam is rotating.