Patent Application
20140083347
The present invention relates generally to transportation. In particular, the invention relates to a method and system for providing ground mobility for a dock.
Floating docks are known. Many such docks are can be divided into one or more articulated segments held together via some type of linkage. The floating dock portions can be entirely wood structures, or, alternatively, can be assembled using floats made from various materials, including polyethylene. These floating docks, which rest in the water, can sustain damage during freezing of the water in which the floating dock rests or breakage of the ice formed in the spring during thawing. In order to protect floating docks from such spring damage, the floating docks can be secured in a sheltered cove or can be moored up against a marina. Better protection is afforded to the floating docks by removing them entirely from the water and storing them upon land during the winter months. Removal of the floating docks from the water is generally performed in one of various manners. One approach is to disconnect the linkages between portions, if any, and then lift the segments onto land. The lifting is performed using a crane, either by towing the floating dock to a location where a crane is stationed, such as for lifting boats out of the water, or by deploying a crane on the shore adjacent the floating dock. This can be slow, expensive and time-consuming. Another approach is to drag the floating dock segments onto land. In some cases, logs are used as rollers under the floating dock segments to facilitate movement of the segments across land. As can be imagined, this approach is arduous and can damage the floating dock segments.
Still another approach is to slip dollies or other wheeled structures under the floating dock segments. This is cumbersome as it requires alignment of the wheeled structures with the floating dock segments and securement of the wheel structures thereto. When the floating dock is re-deployed the following season, the wheel structures are removed from the floating dock segments.
It is therefore an object of the invention to provide a novel method and system for providing ground mobility for a dock.
According to an aspect of the invention, there is provided a system for providing ground mobility for a dock, comprising:
at least one wheel assembly, comprising:
wherein said at least one wheel assembly is buoyant in water.
The at least one wheel assembly can be sufficiently buoyant to maintain the dock above water when said at least one wheel assembly is secured to said dock and said at least one wheel assembly and said dock are placed in water.
The orientation of the at least one wheel can be fixed or can pivot relative to the base element.
The base element can include at least one hole for receiving a fastener to fasten the base element to the bottom portion of the dock. The at least one hole can be in a flange of the base element.
According to another aspect of the invention, there is provided a method for providing ground mobility for a dock, comprising:
securing at least one wheel assembly to a dock, each said at least one wheel assembly comprising a base element configured to be secured to a bottom portion of a dock and at least one wheel rotatably coupled to said base element, each said wheel assembly being buoyant in water and configured such that when said base element is secured to said bottom portion of said dock, said dock is at least partially supported by and rolls along ground on said wheels.
The at least one wheel assembly can be sufficiently buoyant to maintain the dock above water when the at least one wheel assembly is secured to the dock and the at least one wheel assembly and the dock are placed in water.
The orientation of the at least one wheel can be fixed or can pivot relative to the base element.
The securing can include fastening the wheel assembly to the bottom portion of the dock via at least one fastener, each fastener passing through a hole in the base element. The at least one hole can be in a flange of the base element.
According to a further aspect of the invention, there is provided a floating dock assembly, comprising:
a dock; and
at least one wheel assembly, comprising:
wherein said at least one wheel assembly is buoyant in water.
The at least one wheel assembly can be sufficiently buoyant to maintain the dock above water when the floating dock assembly is placed in water.
The orientation of the at least one wheel can be fixed or can pivot relative to the base element.
The base element can include at least one hole for receiving a fastener to fasten the base element to the bottom portion of the dock. The at least one hole can be in a flange of the base element.
An embodiment will now be described, by way of example only, with reference to the attached Figures, wherein:
The invention includes a method and system for providing ground mobility for a dock. By providing wheel assemblies that can be secured to the bottom portion of a dock, the dock can be rolled onto shore directly from the water. Further, by making the wheel assemblies buoyant in water, dock construction can be simplified, as the dock itself may not necessarily need to be buoyant in water itself.
A floating dock assembly 20 in accordance with an embodiment of the invention is shown in
As shown, four wheel assemblies 28 are secured to the bottom portion of the dock 24. Each wheel assembly 28 includes a base element 32 that has a wheel 36 rotatably coupled to it via an axle 40 in a rigid (fixed) orientation relative to the base element 32. The base element 32 and the wheels 36 are polyethylene structures that are foam-filled to provide strength without making the base element 32 and wheels 36 heavy. Polyethylene is environmentally friendly, gasoline resistant, and resistant to aquatic wildlife, such as muskrats, otters and beavers. The wheels 36 are robust enough to withstand the weight of the floating dock assembly 20 when it is being rolled up on shore. The volume and mass of the base element 32 are such that the wheel assembly 28 is buoyant in water. Preferably, the base element 32 and/or the wheels 36 are sufficiently buoyant such that the dock 24 is maintained above the water level when the floating dock assembly is placed in water.
A top surface 56 of the base element 32 is generally planar to correspond with a bottom portion of the dock to which the wheel assemblies 28 are secured. It will be understood that the wheel assemblies 28 can be designed to fit with docks having different features.
The wheel assemblies 28 are provided in different depths and configurations to enable selection of an appropriate size and configuration for a dock 24. The wheel assemblies 28 can be selected such that the overall buoyancy of the floating dock assembly 20 maintains the dock 24 at a desired minimum height above water, thereby reducing exposure of the dock 24 and the hardware securing the wheel elements 28 to the dock 24 to the water. In this manner, the effects of wet rot can be reduced. Further, where the floating dock assembly 20 is being used for docking boats, it may be desirable to have the upper surface of the dock 24 at a higher level to enable easier embarkation and debarkation from the boats. It is also noted that too much overall buoyancy in some circumstances can maintain the dock 24 at higher than a desired level above the water.
By using lightweight wheel assemblies 28, less wood can be used to manufacture the dock 24. Further, the labor required to construct a floating dock assembly can be reduced. Variation of the height and shape of the base elements 32 and their construction enable the height of the dock 24 out of water to be varied.
In an alternative embodiment, the base elements 32 can include a pivoting portion onto which the wheels 36 are rotatably coupled. In this manner, the floating dock assembly 20 can be moved along ground in a direction other than the front-back orientation of the floating dock assembly 20.
While the invention has been described with specificity to wooden docks, other types of docks will occur to those of skill in the art.
Although the described dock is rectangular, the invention can be used with other shapes of docks. For example, the invention can be used with circular docks, polygonal docks, L and C-shaped docks, etc. As the wheel assemblies are made more modular, a larger variety of dock shapes can be accommodated.
Each base element 28 can alternatively include more than one wheel 36. The base elements 28 can be made from a variety of different materials, such as a molded plastic, a sealed foam, etc. They can be made in various shapes and sizes. Other compositions and configurations for the base elements 28 will occur to those skilled in the art.
The wheels can be made from a variety of different materials, such as rubber, a molded plastic, such as polyvinyl chloride, etc. At least some of the buoyancy of the wheel assemblies 28 can be derived from the wheels themselves. Other wheel compositions and configurations will occur to those skilled in the art.
The wheel assemblies 28 can be secured to the dock 24 via other means apart from fasteners. For example, the dock 24 may include features along its bottom portion to enable engagement of corresponding features of the wheel assemblies 28 therewith.
The wheel assemblies 28 may be at least partially secured to the dock 24 via other means, such as by features that engage corresponding features of the dock 24.
The wheel assemblies 28 can be provided with features, such as loops, to enable linkage elements, such as nylon cables, to connect the wheel assemblies 28 together. In this manner, multiple floating dock assemblies 20 can be moved as a unit and held together when deployed.
The above-described embodiments are intended to be examples of the present invention and alterations and modifications may be effected thereto, by those of skill in the art, without departing from the scope of the invention that is defined solely by the claims appended hereto.
