Patent ID: 8356797

Claim:
An adjustable support apparatus comprising a handle-nut assembly comprising a first portion comprising a slotted opening, and a first portion hole, a second portion comprising a tab comprising a threaded first hole having a diameter of approximately the diameter of the first portion hole, and a second hole intersecting the first hole and having a larger diameter than the first hole, a spring positioned in the slotted opening of the first portion and acting upon the tab; a tube assembly comprising a threaded rod projecting through the first portion hole and projecting through the intersecting first hole and second hole of the tab; and a jackscrew assembly comprising a base portion, a hollow support section, and a support, such that a portion of the threaded rod extends into the hollow support section, and such that the handle-nut assembly rests against the support, and such that the spring may be compressed by pushing the tab further into the first portion in order to align the larger second hole with the threaded rod in order to permit the handle-nut assembly to be freely rotated to a desired position, and such that when the spring is released, it forces the projecting tab outwardly with respect to the slotted opening in order to engage the threaded portion of the first hole of the tab against the threaded rod.