Combination Catamaran and V-hull

Abstract

A marine vessel provides a hull having a bow, stern, and port and starboard portions, and a hull bottom having port and starboard sides that form a vee shape. A channel extends longitudinally from the stern toward the bow a distance at least half the hull length, and can extend substantially the entire length of the hull. The bottom of the channel is defined in part by a portion of the hull bottom. The top of the channel is defined by one or more upper panels or surfaces that form catamaran hulls with the port and starboard sides of the hull bottom when the channel is filled with water in a non-planing hull position. The channel is above the water surface when the hull is in a planing position wherein the water drains from the channel.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable

REFERENCE TO A “MICROFICHE APPENDIX”

Not applicable

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to marine vessels. More particularly the present invention relates to an improved marine vessel hull having an outer hull (e.g. deep vee) and a channel that extends longitudinally from the stern of the hull toward the bow a distance at least half the length of the hull, wherein the channel is defined by portions of the outer hull that are below the tunnel and one or more upper surfaces that form an inner and upper part of two catamaran hulls when the channel is filled with water in an off plane position.

2. General Background of the Invention

Marine vessels commonly employ a “vee” or “deep vee” outer hull arrangement. A deep vee hull can be for example a hull having a deadrise of about 20-24 degrees.

While deep vee hulls are smooth riding hulls in rough water and when on plane, they are not as stable as a catamaran style hull when they are not on plane. Patents have issued and applications have published for various hull designs. The following table lists examples. The order of listing has no significance other than chronological.

US Patent or
US Pub.		Pub. Date
Number	Title	MM-DD-YYYY
D186,002	Boat Hull	08-25-1959
3,077,851	Catamaran Type Boat	02-19-1963
3,469,557	Channel Stern Power Boat	09-30-1969
D235,985	Twin Keel Boat	07-22-1975
4,165,703	Air Ride Boat Hull	08-28-1979
D264,573	Combined Boat Hull And Top	05-25-1982
	Thereof
4,587,918	Fine Entry Air Ride Boat Hull	05-13-1986
4,890,564	Extended Bow And Controllable	01-02-1990
	Air
	Cushion Air Ride Boat Hull
5,140,930	Water Craft	08-25-1992
5,231,949	Dihedral Tunnel Boat Hull	08-03-1993
5,265,554	Boat Construction	11-30-1993
D384,321	Boat Hull	09-30-1997
5,833,502	Boat Construction	11-10-1998
6,138,602	Catamaran-V Boat Hull	10-31-2000
6,216,622	Boat Hull Center V-Hull and	04-17-2001
	Sponsons
6,406,341	Shallow Draft Boat	06-18-2002
6,425,341	Boat Hull	07-30-2002
6,708,642	Tri-Sponson Boat Hull And	03-23-2004
	Method Of Making Boat Hulls
2006/0260527	Watercraft Hull Having A	11-23-2006
	Constant FlowTunnel Corresponding
	Method
2007/0266923	Hybrid Hull	11-22-2007
7,316,193	Vessel For Water Travel	01-08-2008

BRIEF SUMMARY OF THE INVENTION

The present invention provides an improved marine vessel that incorporates a hull of improved configuration. The hull provides a bow, stern and port and starboard portions, and a hull bottom having port and starboard sides that form a vee bottom or deep vee bottom.

A channel extends longitudinally from the stern toward the bow a distance at least half the hull length.

The bottom of the channel is defined by a pair of panels that are part of the hull bottom.

An upper part of the channel is defined by one or more upper panels or surfaces that are connected to and extend up from the vee bottom and form a catamaran hull with the port and starboard sides of the hull bottom when the channel is filled with water in a non-planing hull position.

An opening at the stern enables water to fill the channel when the hull is in the non-planing position.

The channel is above the water surface or mostly above the water surface when the hull is in a planing position so that water drains from the channel in the planing position.

In the preferred embodiment, the hull bottom has a “vee” shape with a deadrise of between about 5 and 30 degrees, preferably between 10 and 26 degrees, more preferably between 20 and 24 degrees.

In one embodiment, the upper panels or surfaces form an acute angle. In one embodiment, the upper surfaces form an obtuse angle. In one embodiment, the upper surfaces form a right angle. In one embodiment, the upper surfaces include a curved surface.

In one embodiment, the stern has a transom and the opening is at the stern just below the transom.

In one embodiment, the channel extends to a position next to the bow.

In one embodiment, the channel is mostly or totally below the water line when the hull is not on plane.

In one embodiment, the channel is above the wetted part of the hull when the hull is on plane.

In one embodiment, the channel divides the hull into port and starboard hull sections when the hull is not on plane.

In one embodiment, an air opening in the hull enables air to flow into the channel when the hull transfers between an on plane and an off plane position.

In one embodiment, the air opening is above the waterline from the hull is in the on-plane position.

In one embodiment, the channel has a transverse cross section with a maximum area, and the opening is at least one half the area of the maximum area.

In one embodiment, an air opening extends from the channel through the hull at the bow of the hull.

In one embodiment, there are multiple of said channels.

In one embodiment, the hull has port and starboard chines and the channel extends above and below said chines.

In one embodiment, the channel is defined by four side walls.

In one embodiment, two of the side walls are next to the hull bottom an generally parallel to hull bottom.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

For a further understanding of the nature, objects, and advantages of the present invention, reference should be had to the following detailed description, read in conjunction with the following drawings, wherein like reference numerals denote like elements and wherein:

FIG. 1 is a side, partially sectional view of the preferred embodiment of the apparatus of the present invention;

FIG. 2 is a rear view of the preferred embodiment of the apparatus of the present invention;

FIG. 3 is a sectional view of the preferred embodiment of the apparatus of the present invention;

FIG. 4 is a side, partially sectional view of the preferred embodiment of the apparatus of the present invention showing the hull in an off plane position;

FIG. 5 is a side, partially sectional view of the preferred embodiment of the apparatus of the present invention showing the hull in a transition between off plane and on plane;

FIG. 6 is a side, partially sectional view of the preferred embodiment of the apparatus of the present invention showing the hull in an on plane position;

FIG. 7 is a sectional view of the preferred embodiment of the apparatus of the present invention showing an alternate construction for the channel or tunnel; and

FIG. 8 is a sectional view of the preferred embodiment of the apparatus of the present invention showing an alternate construction for the channel or tunnel.

DETAILED DESCRIPTION OF THE INVENTION

FIGS. 1-8 show preferred embodiments of the apparatus of the present invention designated generally by the numeral 10. Marine vessel or boat 10 provides a hull 11. In the drawings, the numeral 12 indicates the water surface.

Hull 11 has a port side 13 and a starboard side 14. Hull 11 provides a deck 15 to accommodate one or more passengers. Deck 15 can be fitted with chairs, a pilot house, a center console, a steering column and or any other fitting or seating desired. Hull 11 provides gunwales including port gunwale 16 an starboard gunwale 17.

Hull 11 can have attached thereto or received thereon or therein one or more propulsion units 18. In the drawings the propulsion units 18 are outboard motors, though any appropriate propulsion units could be used, including for example inboard motors. Each of the propulsion units 18 in the drawings includes a propeller 19.

Hull 11 provides a hull vee or deep vee portion. Hull 11 provides a bow 21 and stern 22. The hull vee portion 20 provides a keel 23 at the intersection of hull bottom panels or surfaces 24, 25. The bottom surfaces 24, 25 define a hull vee and a deadrise 26 which is illustrated schematically in FIG. 3. The hull deadrise is typically between about 15 and 30 degrees for a vee hull, more particularly between about 20 and 26 degrees for a hull deadrise for deep vee hull.

Hull 11 has a channel 27 that extends longitudinally. Channel 27 is defined by hull bottom segments 28, 29 and inner hull segments 30, 31. These segments 28, 29, 30, 31 can be seen in the rear view of FIG. 2-3. The inner hull segments 30, 31 meet at edge 32 as seen in FIG. 3. Channel 27 is open at hull 11 stern 22. The stern opening 33 can be seen in FIGS. 2 and 3. The channel 27 can be closed at the bow.

An optional port 34 can provide an air opening through which air can enter channel 27 when hull 11 moves from the on plane or planing position of FIG. 6 to the off plane position of FIG. 4. When the vessel hull 11 moves from the on plane position of FIG. 6 to the off plane position FIG. 4, water enters channel 27 via stern opening 33 and fills the channel 27 as illustrated by FIG. 4. Air can optionally exit channel 27 via port 34.

When the hull 11 moves between the off plane position of FIG. 4 and the on plane position of FIG. 6, arrow 41 in FIG. 5 schematically illustrates a discharge of water from channel 27 via stern opening 33. Because the hull bottom surfaces 24, 25 are the “wetted surfaces” that rest upon the water surface 12 when on plane, channel 27 will empty via stern opening 33.

The channel 27 is filled via stern opening 33 when the hull 11 is off plane as shown if FIGS. 2, 3 and 4. In this position, the inner hull segments 30, 31 form portions of catamaran hulls which are designated as port catamaran hull 42 and starboard catamaran hull 43 in FIG. 3. The port catamaran hull is defined by inner hull segment 30 and bottom surface 24. Similarly, the catamaran hull 43 is defined by inner hull segment 31 and the hull bottom surface 25. The catamaran hulls 42, 43 do not include the portion of the hull bottom surfaces 24, 25 that are directly below channel 27. The channel 27 is filled with water in the off plane position as shown in FIG. 3 so that buoyancy is only contributed by the portion of hull 11 that is not flooded, namely the port 42 and starboard 43 catamaran hulls.

FIGS. 7-8 show alternate configurations for the channel 27. Channel 35 shown is FIG. 7 includes inner hull segments 36, 37, 38. In FIG. 8, the channel 39 is defined by curved inner hull segment 40.

The vessel of the present invention can have inboards instead of outboards, in which case it might have jet drives or propellers. It can be outfitted with inflatable rubber bumpers (or bumpers made of other soft material, not necessarily inflatable), preferably on all sides and back, so that the vessel can be used for ship inspections and offshore platform inspections, spar buoy inspections and maintenance, spar-type platform inspections and maintenance, and semi-submersible platform inspections and maintenance. The vessel can also be outfitted with decompression chambers for use in surface supplied commercial diving operations using compressed air and mixed gas diving. The vessel can also be used to support scuba diving operations.

The tunnel could extend throughout the vessel as shown, or it could terminate further back from the front of the vessel. For example, the tunnel could go from the stern to the forward bulkhead (also known as the crash bulkhead or the collision bulkhead).

PARTS LIST

The following is a list of parts and materials suitable for use in the present invention:

Parts Number Description
10           marine vessel/boat
11           hull
12           water surface
13           port side
14           starboard side
15           deck
16           port gunwale
17           starboard gunwale
18           propulsion unit
19           propeller
20           hull vee portion
21           bow
22           stern
23           keel
24           bottom surface
25           bottom surface
26           hull deadrise
27           channel
28           hull bottom segment
29           hull bottom segment
30           inner hull segment
31           inner hull segment
32           edge
33           stern opening
34           port
35           channel
36           inner hull segment
37           inner hull segment
38           inner hull segment
39           channel
40           curved inner hull segment
41           arrow
42           port catamaran hull
43           starboard catamaran hull

All measurements disclosed herein are at standard temperature and pressure, at sea level on Earth, unless indicated otherwise.

The foregoing embodiments are presented by way of example only; the scope of the present invention is to be limited only by the following claims.

Claims

1. A marine vessel, comprising: a) a hull having a bow, stern, and port and starboard portions, and a hull bottom having port and starboard sides that form a vee shape;b) a channel that extends longitudinally from the stern toward the bow a distance at least half the hull length;c) the bottom of the channel being defined by the hull bottom;d) the top of the channel being defined by one or more upper surfaces that form catamaran hulls with the port and starboard sides of the hull bottom when the closed channel is filled with water in a non-planing hull position;e) an opening that enables water to fill the channel when the hull is in the non-planing position; andf) the channel being above a water surface when the hull is in a planing position wherein the water drains from the channel.

2. The marine vessel of claim 1 wherein the hull has a deadrise of between about 5 and 30 degrees.

3. The marine vessel of claim 1 wherein there are at least two of said upper surfaces.

4. The marine vessel of claim 3 wherein the upper surfaces form an acute angle.

5. The marine vessel of claim 3 wherein the upper surfaces form a right angle.

6. The marine vessel of claim 3 wherein the upper surfaces form an obtuse angle.

7. The marine vessel of claim 1 wherein the opening is a stern opening.

8. The marine vessel of claim 1 wherein the stern has a transom and the opening is in the transom.

9. The marine vessel of claim 1 wherein the channel extends to a position next to the bow.

10. The marine vessel of claim 1 wherein the channel is below the water surface when the hull is not on plane.

11. The marine vessel of claim 1 wherein the channel is above the wetted part of the hull when the hull is on plane.

12. The marine vessel of claim 1 wherein the channel divides the hull into port and starboard hull sections when the hull is not on plane.

13. The marine vessel of claim 1 wherein an opening in the hull enables air to flow into the channel when the hull transfers between an on plane and an off plane position.

14. The marine vessel of claim 13 wherein the opening is above the water surface when the hull is in the off plane position.

15. The marine vessel of claim 1 wherein the channel has a transverse cross section with a maximum area and the opening is at least one half the area of the maximum area.

16. The marine vessel of claim 13 wherein the opening extends from the channel through the hull at the bow of the hull.

17. The marine vessel of claim 1 wherein there are multiple of said channels.

18. The marine vessel of claim 1 wherein the hull has port and starboard chines and the channel extends above and below said chines.

19. The marine vessel of claim 1 wherein the channel is defined by four side walls.

20. The marine vessel of claim 19 wherein two of said side walls are next to the hull bottom and generally parallel to the hull bottom.

21. The marine vessel of claim 19 wherein two of said side walls generally track a hull deadrise.

22. A marine vessel, comprising: a) a hull having a bow, stern, and port and starboard portions, and an hull bottom having port and starboard sides that form a vee shape;b) a closed channel that extends longitudinally from the stern toward the bow a distance at least half the hull length;c) the bottom of the closed channel being defined by the hull bottom;d) the top of the closed channel being defined by one or more upper surfaces that form catamaran hulls with the port and starboard sides of the hull bottom when the closed channel is filled with water in a non-planing hull position, each of the catamaran hulls having port and starboard inclined hull surfaces;e) an opening that enables water to fill the channel when the hull is in the non-planing position;f) the channel being above the water surface when the hull is in a planing position wherein water drains from the channel.

23. The marine vessel of claim 22, further comprising propulsion units.

24. (canceled)

25. The marine vessel of claim 1, further comprising propulsion units.