Patent ID: 7081098

Claim:
A lie-down massager comprising: a) a base frame having an elongated top panel, wherein an elongated top opening is formed centrally and lengthwise through the elongated top panel; b) a rider provided below the elongated top panel of the base frame; c) a guide member movably engaged between the base frame and the rider so as to enable the rider to make a horizontally reciprocal movement relative to the base frame; d) a lifter having a top plate and a bottom plate, a fluid operated cylinder fixed to the bottom plate, and a compressor providing pressurized fluid to the fluid operated cylinder, wherein the fluid operated cylinder has a cylinder shaft that is connected to the top plate, wherein the cylinder shaft moves the top plate up and down; wherein the lifter further comprises a guide shaft fixed between the cylinder shaft and the top plate, and a guide bearing that guides the guide shaft, wherein the guide bearing is fixed to the bottom plate, wherein the guide bearing has a guide hole that receives the guide shaft, wherein the guide shaft has a polygonal cross section, and the guide hole has the same polygonal cross section; and e) massage bumps attached on the top plate of the lifter and moving vertically and/or horizontally along the elongated top opening of the elongated top panel of the base frame.