Patent ID: 7926671
Filing Date: 2011-04-19
Classification: B66C

Abstract:
1. A gantry crane configured for lifting a load comprising: a support structure including a first horizontal beam and a second horizontal beam spaced apart from the first horizontal beam, the first and second horizontal beams each having a first end, a second end, and a length between the first and second ends, the support structure further including a first side support frame and a second side support frame, wherein the first and second horizontal beams are connected to the first side support frame and the second side support frame such that the first ends of the first beam and the second beam are connected to the first side support frame and the second ends of the first beam and the second beam are connected to the second side support frame, and wherein the first and second beams extend generally parallel to each other between the first and second side support frames; a first main hoist mechanism capable of raising and lowering a load, the first main hoist mechanism mounted on the first horizontal beam for lateral movement along the length of the first horizontal beam; a second main hoist mechanism capable of raising and lowering a load, the second main hoist mechanism mounted on the second horizontal beam for lateral movement along the length of the second horizontal beam; a first powered auxiliary hoist mechanism capable of raising and lowering a load, the first auxiliary hoist mechanism mounted on the first horizontal beam for lateral movement along the length of the first horizontal beam; and, a second powered auxiliary hoist mechanism capable of raising and lowering a load, the second auxiliary hoist mechanism mounted on the second horizontal beam for lateral movement along the length of the second horizontal beam.