Patent Grant
9381978
The invention relates to watercraft. More particularly, the invention relates to a watercraft for placing objects into water and/or removing objects from water.
In many situations, it is desirable to place objects into water or remove objects from water where the objects are sufficiently large such that it is not possible to manually lift the objects.
For example, in certain regions water freezes during the winter, it is desirable to remove objects such as docks and boat lifts from the water during the winter so that these objects do not get damaged by the ice.
Examples of mechanical systems that may be used to place objects into water or remove objects from water are discussed in the following patents.
An embodiment of the invention is directed to a watercraft with lifting apparatus that includes a watercraft and a lifting apparatus. The lifting apparatus includes a frame, a lift frame assembly, a first engagement mechanism, a second engagement mechanism and a pivot mechanism.
The frame is mounted to the watercraft. The lift frame assembly has a first end and a second end. The first engagement mechanism is capable of causing the first end of the lift frame assembly to engage the frame. The second engagement mechanism is capable of causing the second end of the lift frame assembly to engage the frame. The pivot mechanism causes the lift frame assembly to pivot with respect to the frame.
Another embodiment of the invention is directed to a watercraft with lifting apparatus that includes a watercraft and a lifting apparatus. The lifting apparatus includes a frame, a lift frame assembly, first and second lift arms, a first engagement mechanism, a second engagement mechanism, a pivot mechanism and a ballast arm assembly.
The frame is mounted to the watercraft. The lift frame assembly has a first end and a second end. The first and second lift arms are operably mounted with respect to the lift frame assembly for movement between a retracted position and an extended position.
The first engagement mechanism is capable of causing the first end of the lift frame assembly to engage the frame. The second engagement mechanism is capable of causing the second end of the lift frame assembly to engage the frame. The pivot mechanism causes the lift frame assembly to pivot with respect to the frame. The ballast arm assembly is slidably and pivotally mounted with respect to the frame.
Another embodiment of the invention is directed to a method of moving objects using a watercraft with lifting apparatus. A watercraft is provided. A lifting apparatus is provided that includes a frame, a lift frame assembly, a first engagement mechanism, a second engagement mechanism and a pivot mechanism, wherein the lift frame assembly has a first end and a second end.
The frame is attached to the watercraft. The first engagement mechanism engages the first end of the lift frame assembly and the frame or the second engagement mechanism engages the second end of the lift frame assembly and the frame. The lift frame assembly is pivoted with respect to the frame using the pivot mechanism to cause the lift frame assembly to lift an object.
The accompanying drawings are included to provide a further understanding of embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain principles of embodiments. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.
An embodiment of the invention is directed to a watercraft 10 with lifting apparatus 12 as illustrated in
The watercraft 10 may take a variety of forms using the concepts of the invention. In certain embodiments, the watercraft 10 is a pontoon boat that includes two flats and a platform that extends between the floats.
The watercraft 10 is formed with a length and a width that are sufficiently large such that the lifting apparatus can be mounted thereto. In certain embodiments, at least one of the length or the width of the watercraft is larger than a length or a width of the lifting apparatus 12.
The watercraft 10 is selected with sufficient buoyancy such that the watercraft can not only support the weight of the lifting apparatus 12 but also the weight of the object that is intended to be lifted with the lifting apparatus 12 without the watercraft 10 being submerged in the water.
The lifting apparatus 12 generally includes a lift frame assembly 20, a pivot mechanism 22 and lift arms 24. In certain embodiments, the lifting apparatus 12 also includes a frame 26 that facilitates attachment of the lifting apparatus 12 to the watercraft 10. The frame 26 thereby enables the lifting apparatus 12 to be fully assembled and then attached to the watercraft 10. Such a configuration enables the lifting apparatus 12 to be attached to alternative watercraft 10 such as depending on the weight of the object that is intended to be lifted with the lifting apparatus 12.
The lift frame assembly 20 includes a pair of side rails 30. In certain embodiments, the side rails 30 are mounted in a spaced-apart configuration. The side rails 30 may have a square profile with a channel extending down the center thereof. This channel is adapted to receive the lift arm 24 as is discussed in more detail herein.
The side rails 30 are interconnected with at least one end rail 32. In certain embodiments, there are two end rails 32 positioned at opposite ends of the side rails 30 to interconnect the side rails 30.
The lift frame assembly 20 also includes a center rail 34 that is mounted proximately in the middle of the end rails 32. The center rail 34 is utilized for pivoting the lift frame assembly 20.
The lift frame assembly 20 is fabricated from relatively strong materials that resist deformation or breakage when the lifting apparatus 12 is used to placed objects into water or remove objects from water. In certain embodiments, the lift frame assembly 20 is fabricated from metallic material such as steel.
Proximate a center of the side rails 30, a reinforcing plate 36 may be attached thereto on an outer surface thereof. The reinforcing plate 36 enhances the strength of the side rails 30 to thereby reduce the potential of the side rails 30 bending.
Pivoting of the lift frame assembly 20 with respect to the frame 26 is accomplished by a hydraulic cylinder 40. Opposite ends of the hydraulic cylinder 40 are attached to the center rail 34 and the frame 26. A person of skill in the art will appreciate that alternate mechanisms may be used to pivot the lift frame assembly 20. An advantage of the hydraulic cylinder 40 is its reliability of operation.
The hydraulic cylinder 40 is operably connected to a hydraulic pump that is connected to a motor 42. The motor 42 is attached to the frame 26. A cover 44 may be provided that extends over a portion of the motor 42 to protect the motor 42 from damage as well as to minimize the potential of human injury caused by contact with the components of the motor 42.
A control system 46 operably connects the motor 42 and the hydraulic cylinder 40. In certain embodiments, the control system 46 includes a plurality of levers. The control system 46 may be mounted proximate to the watercraft controls, which are positioned to minimize interference with the lifting apparatus 12.
The lift frame assembly 20 includes an engagement mechanism 50 proximate each end thereof. When the lift frame assembly 20 is in the lowered configuration, the engagement mechanism 50 at both ends of the lift frame assembly 20 may be engaged to prevent the lift frame assembly 20 from tilting.
When it is desired to raise the front end of the lift frame assembly 20, as illustrated in
When it is desired to lower the front end of the lift frame assembly 20, as illustrated in
Engagement and disengagement of the engagement mechanism 50 may be controlled by the hydraulic system. Using such a configuration allows rapid engagement and disengagement of the engagement mechanism 50.
A lift arm drive apparatus 52 is attached to at least one of the side rails 30, as illustrated in
The lift arm drive apparatus 52 may include a hydraulic motor 56, as illustrated in
Each of the lift arm 24 has a central region 60, a tip region 62 and a caster assembly 64, as illustrated in
The tip region 62 has a length that is less than the length of the central region 60 and tapers from a height that is approximately the same as the height of the central region 60 to a height that is less than the height of the central region 60 at an end of the tip region 62 that is opposite the central region 62. The tip region 62 may facilitate digging under an object that is to be lifted.
The caster assembly 64 includes a wheel 66, which is illustrated in
The lifting apparatus 12 may also include at least one ballast arm assembly 70 operably attached thereto. The ballast arm assembly 70 extends into the water and contacts a ground surface beneath the water to provide the watercraft 10 with enhanced stability during the lifting process.
When not in use, the ballast arm assembly 70 may be lowered to a configuration that is generally parallel to the surface of the lifting apparatus 12, as illustrated in
The ballast arm 72 includes a central region 80, a first end region 82 and a second end region 84, as illustrated in
The first end region 82 is attached to a first end of the central region 80. The first end region 82 has a plate 90 extending therefrom, as illustrated in
The second end region 84 is attached to a second end of the central region 80 that is opposite the end to which the first end region 82 is attached. While the ballast arm assembly 70 is extended, the second end region 84 is adapted to engage the ground beneath the water to thereby restrict movement of the watercraft 10 in the water.
In certain embodiments, the second end region 84 has an L-shaped configuration, as illustrated in
The ballast arm mounting mechanism 74 pivotally and slidably mounts the ballast arm 72 with respect to the frame 26. The ballast arm mounting mechanism 74 has an elongated configuration with a channel extending therethrough, which is adapted to receive the ballast arm 72.
An arm 90 extends from the ballast arm mounting mechanism 74. The arm 90 is used to pivotally attach the ballast arm mounting mechanism 74 to the frame 26. A hydraulic cylinder (not shown) extends between the ballast arm mounting mechanism 74 and the frame 26 to control pivoting of the ballast arm mounting mechanism 74 with respect to the frame 26. The hydraulic cylinder is operably attached to the control system 46.
Sliding of the ballast arm 72 with respect to the ballast arm mounting mechanism 74 is controlled using a hydraulic motor 92 that is attached to the ballast arm mounting mechanism 74. The hydraulic motor 92 includes a sprocket that engages the chain attached to the ballast arm 72. The hydraulic motor 92 is operably attached to the control system 46.
In operation, the lift arm assembly 20 is initially in the lowered configuration with the lift arms 24 in the refracted position and the ballast arm assembly 70 in the lowered configuration. The initial configuration minimizes the overall size of the watercraft 10 with lifting apparatus 12.
The lift arm assembly 20 is pivoted and the lift arms 24 are extended until the lift arms 24 engage an object that is to be lifted out of the water. Thereafter, the lift arm assembly 20 is pivoted back to the lowered configuration to lift the object out of the water. If necessary, the ballast arm assembly 70 can be pivoted and extended to enhance the stability of the watercraft during the process of lifting the object out of the water.
Next, the watercraft 10 is propelled to a location to which the object is to be moved. Depending on the height of this location, the lift arm assembly can be pivoted upwardly or downwardly until the object is lowered on to the surface. The lift arms 24 are retracted and the moving process is completed.
Another embodiment of the invention is directed to a lifting apparatus that is fabricated separately from the watercraft. The components of this embodiment are similar to the components in the embodiment described with respect to
An advantage of forming the lifting apparatus separately from the watercraft is that the lifting apparatus can be readily attached to a variety of watercrafts depending on factors such as the situation where it is intended to use the lifting apparatus or the watercraft already in possession of the entity/person that intends to use the lifting apparatus.
Another benefit of fabricating the lifting apparatus separately from the watercraft is that the lifting apparatus can be selectively attached to the watercraft. This configuration thereby enables the watercraft to be used for other purposes when it is not desired to use the lifting apparatus.
In the preceding detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as “top,” “bottom,” “front,” “back,” “leading,” “trailing,” etc., is used with reference to the orientation of the Figure(s) being described. Because components of embodiments can be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The preceding detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.
It is contemplated that features disclosed in this application, as well as those described in the above applications incorporated by reference, can be mixed and matched to suit particular circumstances. Various other modifications and changes will be apparent to those of ordinary skill.
This application claims priority to U.S. Provisional Application No. 61/928,039, which was filed on Jan. 16, 2014, the contents of which are incorporated herein by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 3390657 | Schneider | Jul 1968 | A |
| 6145680 | Jussila | Nov 2000 | A |
| 6491174 | Day | Dec 2002 | B1 |
| Number | Date | Country | |
|---|---|---|---|
| 61928039 | Jan 2014 | US |
