Patent ID: 6217005
Filing Date: 2001-04-17
Classification: B66F

Abstract:
A load supporting device, comprising:a housing having opposite ends, a longitudinal axis extending between said opposite ends, a bore extending through said housing along said longitudinal axis, and an outer surface;said bore having two sets of threads, each of said sets of threads extending inwardly along said bore from a respective end of said housing;a pair of opposed extension members each having a threaded portion and a head portion, said threaded portion of a first one of said pair of extension members having right hand threads, said threaded portion of a second one of said pair of said extension members having left hand threads, each of said threaded portions being threadably received in a respective one of said sets of threads of said bore of said housing and being extendable therefrom; anda pair of base plates, each base plate being removably positionable against one of said head portions for abutting against a surface, each of said base plates having a plurality of flanges extending therefrom for surrounding said head portion when positioned against said base plate to resist rotation of said portion with respect to said base plate, said plurality of flanges defining a gap therebetween, said gap permitting lateral movement of said head portion in a single direction with respect to said base plate.