主权项 |
1. A portable lifting device comprising:
a pair of stanchion assemblies, each comprising a stanchion assembly base member, a stanchion assembly top member, and at least one vertical stanchion having a lower end engaging and being supported by the base member and an upper end engaging and supporting the top member; a plurality of parallel beam assemblies, each having a first beam assembly end removably attached to a first one of the stanchion assembly top members and a second beam assembly end removably attached to a second one of the stanchion assembly top members; and a guide assembly comprising a plurality of collars connected by at least one guide assembly cross member, each collar being slidably mounted to one of the parallel beam assemblies so that the guide assembly is slidable along an axis parallel to the beam assemblies. |