Patent ID: 9745033
Date: 2017-08-29
CPC Classifications: B63C

Claim:
1. A stacker crane for movement of watercraft having a watercraft mass, the stacker crane used in a watercraft storage facility having storage modules, the stacker crane comprising: a bridge operatively suspended in the watercraft storage facility, the bridge including a length; a trolley connected to the bridge, the trolley positioned to translate along the length of the bridge, the trolley including a trolley center of rotation, a trolley mass, and a trolley footprint; a mast device operatively connected to the bridge and connected to the trolley, the mast device including a top, a stanchion and a mast device mass, the top having a first end and a second end, the first end substantially positioned along an axis defined by the trolley center of rotation, the second end attached to the stanchion, the stanchion including a length and having a central axis outside the trolley footprint by a distance approximately equal to a length of the top of the mast device; and a lift assembly attached to the stanchion, the lift assembly including lifting armatures shaped to accept the watercraft and a lift assembly mass, the lift assembly positioned to translate vertically along the length of the stanchion.