Lifter

Details Lifter Lifter

1987-12-11

1988-12-20

Sikes, William L.

Implements or apparatus for applying pushing or pulling force

Rack and pinion

254 11, 254 97, B66F 712

Patent

active

047921218

ABSTRACT:
A device for lifting and positioning a heavy object, comprising a base, a pair of arcuate arm moving rack gears, a pair of arms rotatively affixed to the arcuate rack gears, a pair of arm moving pinion gears fixed to an axle rotatively affixed to each arm and in mechanical engagement with one of the pair of arcuate arm moving rack gears adapted when rotated to move the pair of arms up and down, a foot device rotatively affixed to the pair of arms, a foot pinion gear fixed to an axle rotatively fixed to the pair of arms and fixedly attached to the foot to rotate the foot when the foot pinion gear is rotated, a foot control pinion gear fixedly attached to the base, an elongated member having a rack gear on both of its terminal portions, one of such rack gears in mechanical engagement with the foot pinion gear and the other elongated member rack gear in mechanical engagement with the foot control pinion gear so that when the arm moving pinion gears rotate they cause not only the arm to move up and down but also cause the rack gear of the elongated member in engagement with the foot to linearly move the elongated member rack gear in engagement with the foot control pinion gear and to thus rotate the foot pinion gear to maintain the foot stable and essentially horizontal as the pair of arms are moved from the horizontal to the vertical position and points in between.

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