Abstract: A device for transporting objects vertically and in a helical pattern into and out of a pool of water or similar liquid including carrier means, hydraulic cylinder means adapted to receive the carrier means and be activated by a selected fluid at a selected pressure, guide means carried by the cylinder and adapted to follow a helical elongated cam means as the cylinder is moved vertically along the cam means into and out of the pool of liquid, frame means connecting the hydraulic cylinder and cam means to the structure of the pool. Pressurized fluid supply means are provided to selectively supply fluid at a selected pressure to the hydraulic means whereby the carrier can be lowered into or raised out of the pool while being rotated through an arc during a portion of the upward and downward travel of the hydraulic cylinder.