Rotary boat lift
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United States of America Patent
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-
Sep 8, 1998
Grant Date -
N/A
app pub date -
Jan 2, 1997
filing date -
Jan 2, 1997
priority date (Note) -
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Abstract
Boat lift apparatus comprises vertically oriented upper and lower box beam track members mounted adjacent a dock for the upper track member to extend above the deck of the dock. The upper track member is rotatable relative to the lower track member, and the two track members support a boat cradle for vertical displacement therealong between a lower position in which the cradle is partially submerged in water for loading and unloading a boat thereon and an upper position in which the cradle is on the upper track member and pivotal therewith to overlie the deck. The cradle is provided with upper and lower bearing arrangements by which the cradle is supported for vertical displacement along the track members, and the lower bearing arrangement is comprised of opposed pairs of bearing blocks having planar surfaces for sliding engagement with the track members, and the upper bearing arrangement is comprised of opposed pairs of bearing rolls in rolling engagement with the track members.
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