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US 6,554,533 B2Granted
Hydraulic boat hoist
OwnerByron L. Godberseninventor
Life of this patent
Estimating the term…
Abstract
A boat hoist including a four-post rectangular frame structure having a pair of rails connected between pairs of posts in a parallel manner, a hydraulic piston and cylinder unit mounted within one rail and operationally connected to a level lift pulley and cable suspension system interconnected between the frame and a vertically movable platform mounted on the frame, the piston and cylinder unit provided with either a switch or a valve to prevent accidental lowering of the platform.
Claims3
A hydraulically operated boat hoist comprising:
- a rectangular lifting frame having four corners;
- a horizontally disposed platform attached to said frame, said platform being movable in a vertical direction between a lowered position and a raised position;
- first means for exerting an upwardly directed force at a first point on said movable platform;
- second means separate from said first means for transmitting said upwardly directed force to a second point on said movable platform remote from said first point, wherein said upwardly directed force is evenly distributed between said first point and said second remote point, to raise the platform in a level manner;
- said first means including hydraulic means operable in a first position to raise said platform, operable in a second position to lower said platform, and operable in a third position to maintain said platform in a raised position;
- wherein said hydraulic means includes a piston and cylinder unit, with said piston connected at an exposed end to a pair of flexible cables having free ends each of which is connected to a said first point;
- and
- wherein said hydraulic means including further a switch unit mounted on said cylinder, said switch unit operable upon engagement with said piston to place said hydraulic means in said third position.
5 more elements
Dependencies are inferred from the claim text.