Keith D Rasmussen

US Patent:

47521023, Jun 21, 1988

Filed:

Apr 14, 1986

Appl. No.:

6/852383

Inventors:

Keith O. Rasmussen - San Francisco CA

International Classification:

A47C 340
E04G 122

US Classification:

297345

Abstract:

Apparatus having telescoping box-like cage sections and capable of raising a person or object to a desired height and solidly supporting same at such height, the relative movement of the sections being guided by pre-loaded rollers bearing against vertical guide surfaces provided by the flanges of angle iron members forming the vertical edges of the cage sections. A method is disclosed for assembling the apparatus with the rollers pre-loaded against the cooperating guide surfaces by clamping the angle iron members of the outer cage inwardly before connecting them with cross members under tension.