Patent ID: 6688838
Filing Date: 2004-02-10
Classification: B25J

Abstract:
A cleanroom lift comprising:a) a vertically movable carriage; b) a carriage shaft assembly having a rotating member and at least one preloaded bearing having an inner race disposed over a portion of the rotating member and an outer race coupled to the carriage; c) a first link having a single piece construction comprising an upper member and a lower member coupled by at least one traverse member, at least one of the upper and lower members having a first end coupled to the rotating member of the carriage shaft assembly; d) a first linkage shaft assembly having a rotating member and at least one preloaded bearing having an inner race disposed over a portion of the rotating member and an outer race coupled to a second end of at least one of the upper and lower members the first link; e) a second link having a single piece construction comprising an upper member and a lower member coupled by at least one traverse member, at least one of the upper and lower members having a first end coupled to the rotating member of the first linkage shaft assembly; and f) a gripper coupled to the second link.