Patent ID: 7604134

Claim:
A portable knockdown trolley hoist, comprising: an overhead trolley support member having a top portion and a bottom portion opposing one another; a trolley having a plurality of upper roller bearings, a plurality of lower roller bearings, opposing first mounting plates, an extension boom, and a hoist, said plurality of upper roller bearings and said plurality of lower roller bearings opposing one another, each having shafts transversely mounted to said opposing first mounting plates, said plurality of upper roller bearings above and adjacent said top portion of said overhead trolley support member, said plurality of lower roller bearings below and adjacent said lower portion of said overhead trolley support member, said extension boom having a sheave mounted thereto, said hoist having a winch and a hoist cable, said hoist cable extending from said winch and about said sheave and having a lifting end; opposing raised support members; opposing raised mounts, each said opposing raised mount having opposing second mounting plates removably fastened one to other and sandwiching said overhead trolley support member therebetween, said trolley rollably mounted to said overhead trolley support member between said opposing raised mounts; opposing substantially upright legs, each said opposing raised support member having at least two of said opposing substantially upright legs removably fastened thereto.