Patent ID: 8979148
Filing Date: 2015-03-17
Classification: B66C

Abstract:
1. A fly jib for a crane having a load block, comprising: a variable length beam having a load connection end and an opposite end; a rotation mechanism connected to said variable length beam, said rotation mechanism connectable to the load block so that said rotational mechanism can rotate said variable length beam with respect to the load block; and, a balance mechanism connected to said variable length beam, said balance mechanism keeping said variable length beam in a horizontal position, said balance mechanism including a movable counterweight which is longitudinally positionable along said variable length beam, said variable length beam including a main beam, a load beam connected to said main beam, and a telescoping beam, said telescoping beam received by and hydraulically extendable from said load beam, and said rotation mechanism including a plurality of support arms which are connectable to the load block; and, a disc bearing which rotationally connects said support arms to said main beam so that said main beam can be horizontally rotated with respect to said support arms.