Patent ID: 6435768
Filing Date: 2002-08-20
Classification: B63C,B66C,B66D,B66F

Abstract:
A boat lift apparatus connectable to an elongated tubular piling, a lower portion of which receives support when embedded into a bottom of a body of water, comprising:a motor connected to a gearbox and having an output shaft extending into said gearbox; a first worm gear arrangement including a first worm, a first worm gear and a first support shaft, said first worm rigidly connected coaxially to said output shaft and drivingly engaged with said first worm gear which is rigidly connected on said first support shaft, a rotational axis of said first support shaft oriented orthogonally to a rotational axis of said output shaft; a second worm gear arrangement including a second worm, a second worm gear and a second support shaft, said second worm spaced from said first worm gear and rigidly connected on said first support shaft, said second worm drivingly engaged with said second worm gear, said second worm gear rigidly connected on said second support shaft, a rotational axis of said second support shaft oriented orthogonally to a rotational axis of said first support shaft; an elongated frame connected to said gearbox; a cable drum having a length of cable and mounted for rotation on a third support shaft connected to said frame, said third support shaft substantially parallel with said second support shaft; said cable drum operably connected to, and rotationally driven by, said second support shaft responsive to rotational output of said output shaft to withdraw and extend said cable on said cable drum.