Floating boat lifting apparatus for raising or lowering the boat from or onto the water
AssigneeKsb & Sungpoong Co., Ltd
InventorsIm Cheol Choi, Gyeong Hwa Jeon
Life of this patent
Estimating the term…
Abstract
A boat lifting device for lifting a ship, such as a motorboat, a utility boat, a prefabricated rubber boat, a shipping boat, a cruise yacht, or a dinghy yacht, above the surface or for floating the same on the surface and, more particularly, to a boat lifting device operated by a hydraulic cylinder, air, water pressure, a worm gear, or a rotor.
Claims35
A watercraft lifting apparatus for raising or lowering the watercraft from or onto water, comprising:
- a lifting assembly positioned between a pair of parallel floats to receive the watercraft;
- and
- a pair of U-typed guide structures to guide the parallel floats below or above the water, wherein the pair of parallel floats is longitudinally extended, and
- wherein the lifting assembly is inwardly and downwardly configured to receive or support the watercraft and includes:
- a pair of bunks longitudinally extended,
- a pair of V-typed beams supporting the bunks,
- a longitudinally extended central beam welded at its edges to the lower part of the pair of V-typed beams,
- two pairs of arm structures each connected to both edges of each of the pair of V-typed beams through two pairs of first rotating axles respectively, and
- two pairs of hydraulic cylinders, each cylinder being connected between a second rotating axle positioned below the first rotating axle and a fourth rotating axle of the central beam.
A hydraulic cylinder-operated watercraft lifting apparatus for raising or lowering the watercraft from or onto water, comprising:
- a lifting assembly positioned between a pair of parallel floats to receive the watercraft;
- and
- two pairs of hydraulic cylinder assemblies to guide the parallel floats below or above the water, wherein the pair of parallel floats is longitudinally extended, and wherein each hydraulic cylinder assembly comprises:
- a hydraulic cylinder connected between a third rotating axle which is attached to a protrusion formed on one end of a frame and a first rotating axle which is attached to an upper surface of the floats,
- a first support which is attached to a lower surface of the protrusion of the frame,
- a second support attached to the upper surface of the floats,
- a second rotating axle connecting the first support and the second support, and
- the first rotating axle connecting the second support and the hydraulic cylinder.
A worm gear-operated watercraft lifting apparatus for raising or lowering the watercraft from or onto water, comprising:
- a lifting assembly positioned between a pair of parallel floats to receive the watercraft;
- and
- two pairs of worm gear assemblies to guide the parallel floats below or above the water, wherein the pair of parallel floats is longitudinally extended, and
- wherein each worm gear assembly comprises:
- a first support attached to the protrusion formed on both ends of a U-typed frame;
- a worm wheel connected to a rotating axle in a hole formed on one end of the first support;
- a worm connected to a saw teeth of the worm wheel;
- a worm axle;
- a motor connected to the worm axle;
- a second support connected by the rotating axle of the first support and attached to an upper surface of the floats;
- and
- a housing enveloping the worm wheel, the worm and the worm axle, and attached to a side of the protrusion of the U-typed frame.
A nonrotational-float watercraft lifting apparatus for raising or lowering the watercraft from or onto water, comprising:
- a lifting assembly positioned between a pair of parallel floats to receive the watercraft;
- and
- two pairs of hydraulic cylinder assemblies to guide the floats below or above the water, wherein the pair of parallel floats is longitudinally extended, and
- wherein the hydraulic cylinder assembly comprises a hydraulic cylinder, a bracket sliding in an inside of a cylindrical pillar, and eight sleeves installed on outside edges of the bracket for guiding a sliding movement of the bracket.
A frame-improved hydraulic cylinder-operated watercraft lifting apparatus for raising or lowering the watercraft from or onto water, comprising:
- a lifting assembly positioned between a pair of parallel floats to receive the watercraft;
- and
- two pairs of hydraulic cylinder assemblies to guide the floats below or above the water,
- wherein the pair of parallel floats is longitudinally extended, and
- wherein the hydraulic cylinder assembly comprises:
- a hydraulic cylinder,
- a first support connected to one end of the hydraulic cylinder through a first rotating axle,
- an arm wherein one end of the arm is connected to the other end of the hydraulic cylinder through a second rotating axle, and wherein the other end of the arm is connected to a tip of a float support, and
- a second support attached to an outer surface of an upright upper end of a U-typed frame, and
- a hole for receiving an arm axle through which arm turns are received.
A nonrotational-float watercraft lifting apparatus for raising or lowering the watercraft from or onto water, comprising:
- a lifting assembly positioned between a pair of parallel floats to receive the watercraft;
- and
- two pairs of hydraulic cylinder assemblies to guide the floats below or above the water,
- wherein the pair of parallel floats is longitudinally extended,
- wherein a U-typed frame is embedded in the floats, and
- wherein each hydraulic cylinder assembly comprises:
- a hydraulic cylinder,
- a bracket sliding in an inner part of a cylindrical pillar, and
- rollers installed on four side surfaces for guiding a sliding movement of the bracket.
A hydraulic rotor-operated watercraft lifting apparatus for raising or lowering the watercraft from or onto water, comprising:
- a lifting assembly positioned between a pair of parallel floats to receive the watercraft;
- and
- two pairs of hydraulic cylinder assemblies to guide the floats below or above the water,
- wherein the pair of parallel floats is longitudinally extended, and
- wherein each hydraulic rotor assembly comprises:
- a hydraulic rotor;
- a main gear;
- an idle gear;
- a fan-shaped gear;
- a bracket fixed in a groove of the float;
- and
- an arm.
Dependencies are inferred from the claim text.