초록 ▼

hAn extruded aluminum upright support of a first, vertically elongated, extruded, integral, outer upright member and a second, vertically elongated, extruded, inner upright member telescopically arranged with each other, the outer member having a pair of spaced outer bearing channels, the inner memb

hAn extruded aluminum upright support of a first, vertically elongated, extruded, integral, outer upright member and a second, vertically elongated, extruded, inner upright member telescopically arranged with each other, the outer member having a pair of spaced outer bearing channels, the inner member having a second pair of bearing channels; a first pair of bearings positioned in the first pair of bearing channels and extending laterally into the second pair of bearing channels; and a second pair of bearings positioned in the second pair of bearing channels and extending laterally into the first pair of bearing channels. The bearings are laterally expandable and contractible relative to bearing channels into which they extend. The bearings have two faces in the shape of a laterally oriented V at an obtuse angle to each other cooperable with wedge-shaped spacers each having a sloped face engaging one of the two faces, one of the spacers being axially fixed, and a threaded actuator engaging the other of the spacers whereby the threaded actuator can be employed to linearly move the spacers toward or away from each other to laterally expand or contract the bearings.

대표청구항 ▼

An upright support comprising: a first, vertically elongated, extruded, integral, outer upright member having a first axial end and a second axial end; a second, vertically elongated, extruded, inner upright member having a first axial end and a second axial end; said first and second members being

An upright support comprising: a first, vertically elongated, extruded, integral, outer upright member having a first axial end and a second axial end; a second, vertically elongated, extruded, inner upright member having a first axial end and a second axial end; said first and second members being telescopically arranged with each other to allow said first axial ends to correlate with each other and said second axial ends to correlate with each other; said outer member in cross section having a pair of spaced side walls, and a pair of spaced end walls integral with said side walls to define a hollow interior receiving said inner member; said outer member having a pair of elongated, spaced protrusions extending into said hollow interior and defining a first pair of spaced outer bearing channels; said inner member having a pair of elongated, spaced projections extending adjacent said pair of protrusions and defining a second pair of bearing channels; a first pair of bearings positioned in said first pair of bearing channels and extending laterally into said second pair of bearing channels; said first pair of bearings being adjacent said second axial end of said outer extruded member; a second pair of bearings positioned in said second pair of bearing channels and extending laterally into said first pair of bearing channels; and said second pair of bearings being at said first axial end of said inner member.