Lift system with follower system

摘要

A hydraulic lifting apparatus includes a main hydraulic cylinder and main hydraulic circuit operatively connected to the main hydraulic cylinder. First and second spaced apart follower hydraulic cylinders are also provided. A hydraulic lifting system includes first and second lift towers. Each lift tower includes a main hydraulic cylinder, a main hydraulic circuit, and at least one follower hydraulic cylinder. A follower hydraulic circuit is operatively connected to the at least one follower hydraulic cylinder. A lifting beam spans between the first and second lift towers. The main hydraulic cylinder of each tower is positioned along the beam axis.

主权项

1. A hydraulic lifting apparatus comprising:
a main hydraulic cylinder movable between an extended position and a retracted position; a main hydraulic circuit operatively connected to the main hydraulic cylinder; and first and second spaced apart follower hydraulic cylinders, each being movable between an extended position and a retracted position, wherein the first and second follower hydraulic cylinders are positioned on opposite sides of the main hydraulic cylinder, and wherein each of the main hydraulic cylinder and the first and second follower hydraulic cylinders support a header beam, and wherein each of the main hydraulic cylinder and the first and second follower hydraulic cylinders are positioned on a common base, and wherein said hydraulic lifting apparatus further includes a follower hydraulic circuit operatively connected to the follower hydraulic cylinders, the follower hydraulic circuit being separate from the main hydraulic circuit, and wherein the main hydraulic circuit includes a main hydraulic pump and the follower hydraulic circuit includes a follower hydraulic pump.