Patent ID: 6695533
Filing Date: 2004-02-24
Classification: B63C

Abstract:
A hydraulic lift device for an in-water boat hoist having a base frame, a purality of vertically extending stanchions, and an upwardly moveable lift platform, having a first end and a second end, said hydraulic lift device comprising:a horizontally extending rigid support member having a first end and a second end, including: a horizontally planar base panel; a corresponding horizontally parallel planar top panel; said planar base panel and planar top panel each having a corresponding forward edge and rearward edge and a corresponding first end edge and second end edge; said base panel further defining a first aperture proximate its first end edge and a second aperture proximate its second end edge; a vertical panel back extending between and connecting the rearward edges of the base panel and top panel between their respective first and second end edges, forming a unitary first end edge and a unitary second end edge; and a first end panel and a second end panel extending between and affixed to the first unitary edge and the second unitary edge, respectively; a hydraulic cylinder including a cylinder body affixed horizontally within said support enclosure member, said cylinder body being closed proximate the support enclosure member's first end, and having a piston rod with an outer end, extendable from said cylinder body, horizontally, toward the support enclosure member's second end; said hydraulic cylinder further comprising: a vertical yoke member with an upper end and lower end, affixed vertically centered and perpendicular to the piston rod at its outer end; a reverse directional cable transfer means located proximate to the cylinder body and affixed within the support enclosure member; a first downward directional cable transfer means located proximate the first end of the support enclosure member and affixed therein; a second downward directional cable transfer means located proximate the second end of the support enclosure member and affixed therein; a first lift cable affixed to the upper end of the yoke member and extending substantially horizontally over the first downward directional cable transfer means substantially 90Â° vertically downward, through said first aperture, and affixed to the first end of the lift platform; a second lift cable affixed to the lower end of the yoke initially extending substantially horizontally over the reverse directional cable transfer means and then substantially 180Â° horizontally over the second downward directional cable transfer means substantially 90Â° vertically downward through said second aperture and affixed to the second end of the lift platform; a power source for operating the hydraulic cylinder; and a means of activating said hydraulic cylinder.