US20190291830A1

US20190291830A1 - Pontoon boat wake surf system

Info

Publication number: US20190291830A1
Application number: US16/281,261
Authority: US
Inventors: William Gremminger; David Wilson; Joakim Falck
Original assignee: Volvo Penta AB
Current assignee: Volvo Penta AB
Priority date: 2018-03-23
Filing date: 2019-02-21
Publication date: 2019-09-26

Abstract

A pontoon boat includes a deck supported by two pontoons extending in a fore-aft direction and water diverters mounted to the pontoons, the water diverters being movable between a neutral position that does not substantially divert water and a deployed position extended laterally from the boat to divert water.

Description

The invention is directed to a pontoon boat having apparatus for producing a wake suitable for wake surfing and a method for operating such a pontoon boat.

BACKGROUND AND SUMMARY

Wake surfing has become a popular water sport. Inboard ski/wakeboard boats are the most popular choice for this sport as the propellers are under the boat, and are less likely to make contact with the rider. The boats may be equipped with movable tabs configured to deflect water to increase the size of the wake. The pontoon boat is a popular vessel for large groups of people, but has not been suitable for wake surfing due to a small, weak wake that is not clean enough for the application. The invention is directed to modifications to a pontoon boat adapting it for wake surfing without detracting from the other positive attributes of a pontoon boat such as low cost, smooth ride in rough water and large amount of deck space.
A pontoon boat with modifications as described here can produce a wake for wake surfing.

Adding Tapers to the Rear of the Pontoons:

In a conventional pontoon boat, the back or aft end of the pontoons is generally flat which causes a large disturbance in the water flow as it leaves the pontoon and this is a major reason for the sloppy wake.
A modification according to the invention is replacing the flat end of the pontoon with or adding a tapered section to the back of the pontoon which allows a smooth release of the water from the pontoon and therefore a cleaner wake.

Adding a Wake-Generating Tab to the Lower Side of Each Pontoon:

One tab is mounted on the outboard side of each pontoon at the aft end. The tabs are pivotable between a neutral, water non-deflecting position and a deployed water-deflecting position extending into the flow of water along the pontoon. One tab is deployed at a time to generate a surfing wake on one side of the boat. The deployed tab causes the boat to travel in a straight direction, but with a crab angle and it also causes the boat to tilt somewhat and load one side more than the other.

Adding Ballast by Using the Pontoons as Ballast Tanks:

Normally there are separate containers used in wake boarding or wake surfing boats to add ballast. According to the invention, the pontoons are used as the ballast tanks, either as a single tank, or by dividing the pontoon into two or more compartments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a conventional pontoon boat;

FIG. 2 is a view of the aft end of a pontoon according to the invention showing a taper; and,

FIG. 3 is a schematic of a pontoon configured to have ballast tanks and a pump and valve system.

DETAILED DESCRIPTION

A pontoon boat with wake surfing system is described. By pontoon boat is meant a watercraft having two or more elongated buoyant pontoons, also called floats, which are laterally spaced and extend in the boat's fore-aft direction. The pontoons support a platform for an operator and passengers. A third pontoon may be included and disposed between the two pontoons. A propulsion device, for example, an internal combustion engine and propeller drive, may be mounted at the aft end of the boat and supported by the third, middle pontoon, if the boat has one, or by the platform or structure supported by the two laterally-spaced pontoons. An example of a conventional pontoon boat is described in U.S. Pat. No. 4,892,052 to Zook, et al. FIG. 1 below is from the '052 patent to illustrate a conventional pontoon boat 10 having two, laterally-spaced pontoons 14 supporting a platform 12. Details of the deck 41 and deck mounting, indicated by reference numbers 20, 24, and 26 are not part of the present invention.
Pontoons or floats typically have a cone or prow shaped fore end 14 and a flat or semi-spherical aft end, as may be seen in FIG. 1. One aspect of the Invention is to add to or replace the current aft end portion with a tapered aft end portion that converges at the aft end. This shape will improve the way water flows along the aft end of the pontoon for a cleaner wake. The tapered aft end may take the form of a cone, a V-shape, a prow shape, or other tapered shape. FIG. 2 shows an example of a tapered aft end 40 extending from a tubular main body portion 42 of a pontoon according to the invention.
The pontoons may also serve as ballast tanks. The pontoons may be configured as a single tank using part or all of the interior space. Alternatively, the pontoons may be configured with one or more compartments that may be flooded and emptied individually. Each tank or compartment may have baffles to inhibit water sloshing inside the tank or compartment. FIG. 3 is a schematic of a pontoon 30 configured to have three interior tanks 32. Each tank or compartment 32 may have one or more controllable valves, including an air venting valve 36, control the entry and release of water. A pump arrangement 34, which may be one or more dedicated pumps, or a reversible pump for each tank or compartment, may be mounted operationally with a controllable valve to facilitate the entry and release of water from the tank or compartment.
Alternatively, the pontoons may have a so-called ram fill system to fill the ballast tanks. In a ram fill system, there is an opening in the bottom of the pontoon controlled by a fill valve which opens to allow the tank to fill by ram pressure while the boat is moving. The tanks empty using valves at the back end of the boat which open to allow water to exit while the boat is underway.
In operation for generating a surfing wake, a pontoon on one side of the boat will be flooded with water until the boat attains the desired attitude and/or the pontoon is submerged to a desired degree. For a pontoon configured with two or more tanks, the tanks may be flooded one by one, either partially filled or fully filled as conditions merit.
Referring again to FIG. 2, the pontoon boat according to the invention may also include water-deflecting tabs 50 mounted on the pontoons 40 or on the deck near the aft end of the pontoons. The tabs may be pivotable between a neutral position in which they do not deflect or only insubstantially deflect water and a deployed position in which they deflect water to generate or add to a surfing wake. A controllable actuator may be operationally coupled with each tab to move the tabs between the neutral and deployed positions. The tabs may be configured as in U.S. Pat. No. 8,578,873 to Gasper et al., which is incorporated herein by reference. The Gasper tabs pivot into and out of the deployed position. Tabs mounted on the deck frame may raise and lower between the neutral and deployed positions. Other tab configurations capable of generating or adding to a surfing wake may alternatively be employed. FIG. 2 shows a fixed tab 50 mounted on the side of the pontoon 40 and supported by arms 52. Alternatively, the tabs 50 may be pivotably mounted to the pontoon and the arms may be replaced by actuators capable of moving the tabs between the neutral and deployed positions.
The invention has been described in terms of illustrative and alternative embodiments, components, and features. However, the scope of the invention is not necessarily limited thereby, but is defined by the appended claims.

Claims

What is claimed is:

1. A boat, comprising:

a deck supported by two pontoons extending in a fore-aft direction; and,

a water diverter mounted to one of the deck and at least one pontoon, the water diverter being movable between a neutral position that does not substantially divert water and a deployed position extended laterally from the boat to divert water.

2. The boat as claimed in claim 1, wherein the water diverter is a first water diverter mounted to the deck and comprising a second water diverter mounted to deck on a side opposite the first water diverter.

3. The boat as claimed in claim 1, wherein the water diverter is a first water diverter mounted to the at least one pontoon and comprising a second water diverter mounted to the other pontoon.

4. The boat as claimed in claim 1, comprising at least one ballast chamber formed in the at least one pontoon and configured to selectively fill or discharge water therefrom.

5. The boat as claimed in claim 1, wherein the aft end portion of each pontoon is tapered to converge at the aft end.