Patent ID: 7344117

Claim:
An adjustable lift support apparatus, comprising: a base; a sleeve, attached onto the base via a tail end of the sleeve, having an inner surface on which at least one groove is formed from a head end of the sleeve along a first axial direction; at least one meshing device each of which corresponds to one of the at least one groove, each of the at least one meshing device being mounted within the corresponding groove and comprising a flexible protrusion disposed toward the first axial direction; a shaft, inserted into the sleeve via a first end of the shaft, having an outer surface on which at least one rack consisting of a plurality of teeth is provided along a second axial direction, each of the at least one rack respectively corresponding to one of the at least one groove and being partially disposed within the corresponding groove, such that the flexible protrusion of the corresponding meshing device is meshed between two neighboring teeth of said at least one rack; and a support, attached onto a second end of the shaft; wherein the lifting and the lowering of the support together with the shaft is actuated by applying an external force on the support or the shaft to make each of the at least one rack move with respect to the flexible protrusion of the corresponding meshing device, until the flexible protrusion of the corresponding meshing device is meshed between the two neighboring teeth of said at least one rack at a desired height.