Patent ID: 8827091

Claim:
A family of cranes each comprising a lower traveling body and an upper rotating body rotatably mounted on the lower traveling body, the upper rotating body including a rotating frame and lifting equipment mounted on the rotating frame, the lifting equipment including a boom and a plurality of types of winches, thereby allowing each crane to have a specified lifting capacity, wherein the family of cranes includes: a first model crane having a first lifting capacity; a second model crane having a second lifting capacity greater than the first lifting capacity; a third model crane having a third lifting capacity greater than the second lifting capacity; a fourth model crane having a fourth lifting capacity greater than the third lifting capacity; a lifting capacity difference between the first model crane and the second model crane being different from a lifting capacity difference between the third model crane and the fourth model crane; the first model crane and the second model crane each including a first type of rotating frame which has a first mounting space arrangement for mounting the lifting equipment of the second model crane; and the third model crane and the fourth model crane each including a second type of rotating frame which has a second mounting space arrangement for mounting the lifting equipment of the fourth model crane.