Patent ID: 6561368
Filing Date: 2003-05-13
Classification: B66C

Abstract:
A telescoping tube assembly comprising:a frame; a first longitudinal tube section mounted on the frame; an innermost longitudinal tube section disposed within the first longitudinal tube section and adapted for telescoping motion into and out of the first longitudinal tube section, wherein the innermost longitudinal tube section comprises a remote end; a cabling system comprising a top pulley assembly and a bottom pulley assembly, the bottom pulley assembly adapted for movement relative to the top pulley assembly and in response to the telescoping motion of the innermost longitudinal tube section wherein the top pulley assembly is stationary relative to the first longitudinal tube section; one or more cables extending within the telescoping tube sections from the remote end of the innermost longitudinal tube section and traversing the top pulley assembly and the bottom pulley assembly, wherein the top pulley assembly is traversed before the bottom pulley assembly, the one or more cables being fixed relative to the frame.