Not applicable.
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Not applicable.
1. Field of the Invention
The invention relates generally to a lift and storage device for a small boat tender, inflatable or rigid, and more particularly to a singlehanded means to stow and retrieve a small yacht tender on the roof or over the stern section of a larger host vessel.
2. Description of Related Art
In the operation of a sailboat or a power boat, many marine venues require that the boat be anchored offshore and as a result, a small boat such as a dinghy or personal watercraft is needed to transfer persons and/or supplies between shore and the anchored host vessel. Therefore, it is not uncommon to see such larger vessels with a dinghy in tow, attached by a tow line to the stern of the larger host vessel.
Handling of the dinghy, particularly when the boat is in motion, has posed problems. Towing of a dinghy with a tow line which is secured to the dinghy at a single point, results in a significant drag on the boat which greatly affects the operation of the host vessel. Further, water currents or turbulence can interfere with the safe raising and storage of the dinghy, particularly in rough seas. Problems arise if the dinghy motor is not removed during such towing. There is a serious risk that the dinghy motor will be flooded with water if the dinghy submerges with the wave action in rough waters.
Removal of the motor leads to other problems. The dinghy tends to drift uncontrollably because of its relative light weight construction. This drifting problem becomes relatively acute in narrow waterways where other vessels as well as adjacent permanent structures such as boat docks, swimming docks, launching ramps, etc. may be present. Further, in such narrow waterways the speed of the host vessel is reduced which significantly increases the drifting problem.
Since the dinghy is used to transfer persons to and from shore, it is necessary to first install the outboard motor on the dinghy before it can be used. Such installations pose additional problems since most dinghies are not particularly stable and minor changes in weight distribution can easily shift and tilt the dinghy dramatically. Installing an outboard motor on the dinghy in open waters can easily result in loss of the outboard motor as well as in personal injury. As a result, many boat operators choose to simply tow the dinghy with the outboard motor installed and accept the risk of possible water damage over the potential difficulties and safety aspects associated with outboard motor removal and installation.
The prior art has attempted to solve some of the stated problems. For example, Anderson, U.S. Pat. No. 3,143,991 describes a device for carrying a dinghy on a transom shelf of a step providing a shelf area extending rearwardly of the stern and slightly above the waterline of the host vessel. The device is a bi-articulated linkage mechanism attached to the transom of a power cruiser. The bi-articulated frame is hoisted until the frame has pivoted upwardly sufficient to lift the inboard side of the dinghy out of the water and support most of the dinghy's weight thereon, yet leave the outboard side of the dinghy at least partially in the water. At this point, inboard portions of the frame have moved into abutting relation with the inboard side of the dinghy.
The dinghy is then hoisted clear of the water by hauling in on an outboard line attached to the outboard side of the dinghy. During this sequence, the dinghy laterally tilts toward the cruiser moving about a pivot axis provided by pivot pins on the linkage. As the dinghy is lifted by the outboard line, the bi-articulated linkage becomes fully folded on the shelf and with the weight of the dinghy progressively aiding the tilting and linkage folding movement. Upon completion of the tilting movement, the dinghy nests against the stern edge of the cruiser substantially directly above the gunwale. A line is secured to a suitable cleat on the cruiser to maintain this dinghy until the dinghy is launched for use.
Sandrow, U.S. Pat. No. 4,964,358 describes a dinghy rigging mechanism designed to permit the expeditious recovery, hoisting and stowing of a small boat or dinghy in an upright position at the stern of a host vessel. The invention is devised to be readily detached from the host vessel and stowed to avoid unsightly presence of the equipment when it is not being used.
The rigger equipment may be detachably affixed for use directly on the transom of a host vessel or adapted to be detachably secured at the trailing edge of a swim platform. The mechanism is devised to dip into the water, allowing the small boat or dinghy to be floated into position on the arms of the rigging apparatus. Since the dinghy is recovered while being maintained upright, the outboard motor or steering equipment need not be removed from the dinghy in order to recover and stow the small craft on the host vessel.
Burke, U.S. Pat. No. 5,018,475 describes a bracket for securing a dinghy to a yacht. The bracket has a member adapted to fit over one of the pontoon portions of the dinghy. The bracket has, at one end thereof, an element for removably securing the member to the yacht. The bracket also comprises a mounting assembly for mounting the member to the dinghy.
Maurizio, U.S. Pat. No. 5,133,275 describes the onboard dinghy cradle which comprises a framework of hollow tubings that are secured together by fittings and connectors. The framework produced includes bottom cross members which extend across the width of the dinghy at a predetermined distance below the bottom surface thereof. Side tubings are also provided for positioning one side of the dinghy close to a supporting surface for the cradle, such as a swim platform, and to keep the dinghy from moving away as it is being boarded or left. The cradle is pivotally mounted to the supporting structure so it can be pivoted to a vertical storage position, having the dinghy, with or without a small outboard motor attached thereto, up and out of the water.
Weaver, U.S. Pat. No. 4,850,295 describes a davit for an inflatable dinghy or other small inflatable boat including a pair of lock devices secured to the stern of the carrier host boat for engaging and supporting a hanger assembly mounted on the inflatable dinghy and enabling the dinghy, to be swung between in-water and out-of-water positions, and a pair of stand-off brackets attached to the stern of the carrier host boat that support the inflatable dinghy in its raised out-of water position. Each hanger assembly has an outboard catch supported by a resilient, flexible pad which in turn is adhesively secured to the dinghy sidewall or causing the support pad to separate therefrom.
These and other prior art teach various hoist and dinghy systems in an effort to solve some of the aforementioned problems. However, what is needed is a singlehanded means to stow and retrieve a dinghy or small yacht tender and yet provide unencumbered access to swim platforms in the stowed or deployed positions, and provides a very stable platform for loading an outboard motor installation or removal via a latching system.
The present invention enables single-handed, simple and rapid launching, recovery and stowage of a dinghy or small yacht tender on the roof or comparable suitable upright support structure mounted to the deck of a host vessel or above the host vessel's cockpit. The invention provides a host vessel and dinghy or small yacht tender with a lift arm frame mechanism, mounted to the stern of the host vessel, coupling the tender to the host vessel to stabilize the tender with respect to the host vessel. Under these conditions, the tender can be comfortably loaded or unloaded and the tender is reasonably close to the step or swim platform shelf extending rearwardly from the vessel that permits easy, safe removal or mounting of the dinghy's outboard motor.
The frame mechanism is an H-shaped lift arm mechanism with two longitudinal lift arm members attaching the transom of the tender with the transom of the host vessel. A cross member is positioned nearer to the tender end. With the outboard motor positioned between the tender and the swim platform of the host vessel, the removal or installation of the outboard motor from the tender is considerably simplified and safer than the prior art method of removing an outboard motor from a tender or dinghy. Also, the H configuration of the frame mechanism holds the tender in a very stable fashion relative to the host vessel.
The rooftop configuration of the host vessel for storing the tender can be either of two configurations. If the host vessel's rooftop extends completely over the stern of the host vessel, the tender can be partially or completely stored on the roof. If the host vessel's rooftop does not extend over the stern portion of the vessel, a support frame made from marine tubing, can easily be created or constructed over the stern portion or cockpit of the host vessel if the roof does not extend beyond the cockpit of the host vessel. In either case, an electric winch assembly is mounted on top of the roof and positioned very close to the parked location of the tender's bow when completely stored on the roof. At the rear edge of the roof, or support frame, three free-wheeling rollers are installed to assist in guiding the tender during stowage and retrieval maneuvering.
A winch cable spans from the roof mounted winch over the center pulley or roller mounted to the edge of the roof and is attached to a harness that in turn is attached to the bow of the tender as will hereinafter be disclosed. Two additional lift lines of the harness have one end attached to the winch cable nearby where the bow of the tender is attached. The opposite ends of each line are attached, respectively, to each longitudinal lift arm member of the H-shaped lift arm structure.
With the tender securely coupled to the H-shaped lift arm structure and the winch cable secured to the bow of the tender as well as to the H-shaped lift arm structure by the two lift ropes of the harness, the winch can now be energized in the up direction. The winch cable will lift the bow of the tender out of the water as the tender pivots about the pivot connection coupling mechanism mounted on the transom of the tender. The tender continues its pivoting motion until the tender comes into contact with two of the three free-wheeling rollers mounted at the edge of the rooftop (or support frame). The two rollers on either side of the center roller/pulley will support the sides of the tender (tubes in the case of an inflatable tender, gunnel in the case of a rigid tender) as the sides proceed past the rollers during stowage and deployment. As the winch cable continues in the up direction, the tender will be pulled atop the roof while the two lift ropes of the harness will lift the H-shaped lift arms to pivot the lift arms in a clockwise direction about its pivotable attachment point on the transom of the host vessel to store the tender on the roof or support frame adapted to stow the tender above an open deck at the stern of the host vessel.
A primary objective of the present invention is to provide a practical, efficient, simple, and easy way to operate the support and rigging apparatus for raising and lowering a small watercraft such as a dinghy or personal watercraft to a host vessel afloat in the water and store such dinghy on the extended roof of the host vessel or a support frame mounted above the deck or cockpit at the stern of a host vessel.
A further object of the present invention is to provide an apparatus for stowing and/or launching a personal water craft, such as a dinghy, to a host vessel wherein the person watercraft is stabilized and securely latched to the host vessel so its contents and passengers can easily and safely be unloaded onto the host vessel before the personal watercraft is hoisted for storage on the host vessel.
It is yet a further object of the present invention to provide an apparatus for stowing and/or launching a personal watercraft from a host vessel which does not encumber access to the swim platform whether the personal watercraft is in the stowed or deployed position, thus leaving the aft portion of the host vessel and swim step available for other use.
It is still a further object of the present invention to provide an apparatus for stowing and/or launching a personal watercraft from a host vessel that does not scratch, mar, or damage the personal watercraft or swim platform of the host vessel during retrieval or launching of the personal watercraft from the host vessel.
It is still a further object of the present invention to provide an apparatus for stowing and/or launching a person watercraft from a host vessel that is simple and easy to operate that only needs a single motor and winch to complete either the stowage or launching of the personal watercraft onto the host vessel.
These and other features of the present invention will become apparent from the following more detailed description, taken in conjunction with the accompanying drawings which illustrate by way of example, the principles of the invention.
The present invention together with the above and other objects and advantages may best be understood from the following detailed description of the preferred embodiments of the invention illustrated in the drawings, wherein:
a is a side view of the hook and removable latch used for the pivot connection on top of the transom of the small yacht tender;
b is a fragmented top view of the removable latch used for the pivot connection on top of the transom of the small yacht tender;
With reference to the drawings,
With reference to
In general terms, the lift arm mechanism 18 consists of a pair of elongated H-shaped rigid lift arm members 22, 24 of appropriate length (the length will vary as a function of the size of the small yacht tender 12 and the size of the swim platform 38 of the host vessel 10) having a first pair of ends 26, 28 coupled to pivotable connections 30, 32 for rotation thereabout as the tender 12 is lifted to its stowage place on the roof 34 of the host vessel 10. A cross member 25 is positioned near the small yacht tender 12 end to secure the elongated H-shaped rigid lift arm members 22, 24 together into a frame unit. The pivot connections 30, 32 are in a horizontally spaced-apart relationship straddling the opening 36 in the stern 20 of the host vessel 10 which permits access to the swim platform 38. The pivot connections 30, 32 permit the lift arm mechanism 18 to be pivoted upwardly and downwardly relative to the stern 20 of the host vessel 10. The opposing ends 40, 42 of the elongated H-shaped rigid lift arm members 22, 24 are releasably joined to a second pair of pivot connections 44, 46 mounted to the transom 48 of the small yacht tender 12 also in a horizontally spaced-apart relationship, straddling the attachment point of the tender's 12 outboard motor 14. Similar to the pivot connections 44, 46 mounted to the stern 20 of the host vessel 10, the pivot connections 30, 32 mounted to the tender 12 allows the tender 12 to pivot upwardly and downwardly relative to the elongated H-shaped rigid lift arm members 22, 24 and are releasable to allow deployment of the small yacht tender 12.
As clearly shown in
By way of example,
The second pivot connection 44, 46 between the opposing ends 40, 42 of the elongated H-shaped rigid lift arm members 22, 24 and the transom 48 of the small yacht tender 12 is shown in
The pivot connection 30, 32 between the stern 20 of the host vessel 10 and the first pair of ends 26, 28 of the elongated H-shaped rigid lift arm members 22, 24 may use the same type of quick release latch mechanism 74 as that used on the transom 48 of the tender 12 as illustrated in
The operation procedure for retrieval and stowage of the small yacht tender 12 on the host vessel 10 is a single-handed operation initiated by an operator located in the cockpit since some aspects of the stowage as well as launching require manual intervention. The small yacht tender 12 is brought to the host vessel 10 in a stern 20 to stern 49 relationship as shown in
In order to launch the tender 12 from its stowed position as shown in
As described above, the towing arrangement solves the problems associated with prior art practices. The outboard motor and tender being completely out of the water eliminates drag on the host vessel when in motion at any speed. The use of a pair of horizontally spaced-apart lift arm members attached to both the stern of the host vessel as well as the transom 48 of the tender provides stability in supporting the tender 12 when the outboard motor is removed and passengers are loaded into or unloaded from the tender 12. Since the small yacht tender is stored on top of the roof or other suitable support structure in an upside-down position there is no need to provide a cover for the small yacht tender while the host vessel is docked.
While the present invention has been described in terms of a preferred embodiment, it is apparent that other forms may be adopted by one skilled in the art. In other words, claim elements are not limited to the imperfection of the exact language used, but encompass as well other structures that fulfill the same functional purpose. For example, the electric winch may be mounted to the underside of the roof so that direct control, without a wireless control, is possible providing the appropriate support necessary to route the winch cable to the same upper position that is used with a top of roof mount winch, is provided. Those skilled in the art will appreciate that other applications are possible with this invention. Accordingly, the present invention is not limited to the preferred embodiment disclosed. Therefore, the scope of the present invention is to be limited only by the following claims.
Number | Name | Date | Kind |
---|---|---|---|
2294864 | Palmer | Sep 1942 | A |
3143991 | Anderson | Aug 1964 | A |
4157596 | Green | Jun 1979 | A |
4850295 | Weaver | Jul 1989 | A |
4964358 | Sandrow | Oct 1990 | A |
5018473 | Foster | May 1991 | A |
5133275 | Maurizio | Jul 1992 | A |
5170742 | Roskelley | Dec 1992 | A |
5193479 | Bielefeld | Mar 1993 | A |
6038994 | Ford et al. | Mar 2000 | A |
6782841 | Esposito | Aug 2004 | B2 |
7231882 | Zander | Jun 2007 | B2 |
7475649 | Shepherd | Jan 2009 | B2 |
Number | Date | Country | |
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20120125253 A1 | May 2012 | US |