U.S. patent application number 13/830799 was filed with the patent office on 2013-09-05 for surf wake system for a watercraft.
This patent application is currently assigned to MALIBU BOATS, LLC. The applicant listed for this patent is MALIBU BOATS, LLC. Invention is credited to DANIEL LEE GASPER, RACHAEL MARIE GREEN, ADAM ANDREW MCCALL, WAYNE RICHARD WILSON.
Application Number | 20130228116 13/830799 |
Document ID | / |
Family ID | 48290622 |
Filed Date | 2013-09-05 |
United States Patent
Application |
20130228116 |
Kind Code |
A1 |
GASPER; DANIEL LEE ; et
al. |
September 5, 2013 |
SURF WAKE SYSTEM FOR A WATERCRAFT
Abstract
An adjustable surf wake system enhances a wake formed by a
watercraft travelling through water. The system may include a flap
for deflecting water traveling past the stern of the watercraft,
and/or a positioner operably connected to the flap for positioning
the flap relative to a longitudinal axis of the watercraft between
a neutral position and an outward position. Positioning a port flap
in its extended position enhances a starboard surf wake, and
positioning the starboard flap in its extended position enhances a
port surf wake.
Inventors: |
GASPER; DANIEL LEE;
(Atwater, CA) ; MCCALL; ADAM ANDREW; (Greenback,
TN) ; WILSON; WAYNE RICHARD; (Knoxville, TN) ;
GREEN; RACHAEL MARIE; (Loudon, TN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
MALIBU BOATS, LLC |
Merced |
CA |
US |
|
|
Assignee: |
MALIBU BOATS, LLC
Merced
CA
|
Family ID: |
48290622 |
Appl. No.: |
13/830799 |
Filed: |
March 14, 2013 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
13545969 |
Jul 10, 2012 |
|
|
|
13830799 |
|
|
|
|
61559069 |
Nov 12, 2011 |
|
|
|
Current U.S.
Class: |
114/284 |
Current CPC
Class: |
B63B 1/28 20130101; B63B
34/70 20200201; B63B 39/061 20130101; B63B 34/75 20200201; B63B
32/70 20200201; B63B 1/32 20130101 |
Class at
Publication: |
114/284 |
International
Class: |
B63B 1/32 20060101
B63B001/32 |
Claims
1. A boat configured to modify its wake for wake surfing, the boat
comprising: a hull comprising port and starboard side strakes, a
bottom, a transom aft said side strakes, and a longitudinal axis,
wherein when said hull moves through water, water flows along the
port and starboard side strakes and then beyond the transom to at
least in part form a first wake; starboard and port upright water
diverters each movable between a first position and a second
position, said second position of said starboard water diverter
laterally extending beyond said starboard side strake at the
transom substantially perpendicular to said longitudinal axis of
the hull, and said second position of said port water diverter
laterally extending beyond said port side strake at the transom
substantially perpendicular to said longitudinal axis of the hull,
wherein when said hull moves through water, said starboard diverter
in said second position redirects water passing along said
starboard side strake as said water moves beyond said transom to
produce a port side surf wake different from said first wake and
wherein when said hull moves through water, said port diverter in
said second position redirects water passing along said port side
strake as said water moves beyond said transom to produce a
starboard side surf wake different from said first wake and
different from said port side surf wake.
2. The boat of claim 1, wherein a portion of the starboard and port
water diverters are located within the resting freeboard distance
when the boat is not moving through water.
3. The boat of claim 1, wherein said port water diverter moves from
said second position to said first position while said starboard
water diverter moves from said first position to said second
position while the boat moves through the water changing from a
starboard side surf wake to a port side surf wake as said boat
moves through water.
4. The boat of claim 1, wherein said starboard side surf wake is
produced without significant starboard side pitching of the hull
and wherein said port side surf wake is produced without
significant port side pitching of the hull.
5. The boat of claim 1, wherein the starboard and port side water
diverters are each movable to one or more interim positions between
said first and said second positions.
6. The boat of claim 1, wherein a surfer activates an electronic
device remote from said boat causing one of said starboard and port
water diverters to move from said first position toward said second
position.
7. (canceled)
8. The boat of claim 1, comprising wake modifying devices that do
not provide lift to the transom as the hull moves through the
water.
9. (canceled)
10. (canceled)
11. (canceled)
12. The boat of claim 1, wherein in said first position, the
starboard and port water diverters do not substantially interfere
with said water moving along said side strakes.
13. A surf wake system deployable on a boat, said system configured
to modify a wake of said boat for wake surfing, the surf wake
system comprising: a starboard upright water diverter movable
between a first position and a second position, said second
position of said starboard water diverter laterally extending
beyond a starboard side strake at a transom of said boat
substantially perpendicular to a longitudinal axis of a hull of
said boat, wherein when said hull moves through water, said
starboard diverter in said second position redirects water passing
along said starboard side strake as said water moves beyond the
transom of said boat to produce a port side surf wake different
from said wake of said boat; a port upright water diverter movable
between a first position and a second position, said second
position of said port water diverter laterally extending beyond
said port side strake at the transom substantially perpendicular to
said longitudinal axis of the hull, wherein when said hull moves
through water, said port diverter in said second position redirects
water passing along said port side strake as said water moves
beyond said transom to produce a starboard side surf wake different
from said wake and different from said port side surf wake; a
controller responsive to user driver input into an input device; a
starboard side actuator responsive to signals from said controller,
one end operably secured with respect to said hull and another end
operably connected to said starboard water diverter, wherein
actuation of said starboard side actuator moves said starboard
water diverter between said first and second positions; and a port
side actuator responsive to signals from said controller, one end
operably secured with respect to said hull and another end operably
connected to said port water diverter, wherein actuation of said
port side actuator moves said port water diverter between said
first and second positions.
14. The surf wake system of claim 13, wherein said water diverters
comprises flaps.
15. The surf wake system of claim 13, wherein said port water
diverter moves from said second position to said first position
while said starboard water diverter moves from said first position
to said second position while the boat moves through the water
changing from a starboard side surf wake to a port side surf
wake.
16. The surf wake system of claim 15, wherein said change is
responsive to a user pressing a single button on said input
device.
17. The surf wake system of claim 13, wherein said starboard side
surf wake is produced without significant starboard side pitching
of the hull and wherein said port side surf wake is produced
without significant port side pitching of the hull.
18. The surf wake system of claim 13, wherein the starboard and
port side water diverters are each movable to one or more interim
positions between said first and said second positions.
19. (canceled)
20. A surf boat configured to create a wake surfable by a wake
surfing rider, the surf boat comprising a hull comprising port and
starboard side strakes, a bottom, a transom aft said side strakes,
a longitudinal axis, and a plurality of wake modifying devices
including a pair of upright water diverters each laterally
extendable beyond one of said starboard or port side strakes at the
transom substantially perpendicular to said longitudinal axis of
said hull of said boat and laterally retractable behind said
transom, said extension and said retraction capable of occurring
while said surf boat moves through water.
21. The surf boat of claim 20, wherein a rider controls said
lateral extension of said wake modifying devices as the rider surfs
the wake.
22. The surf boat of claim 20, wherein said lateral extension
includes a plurality of interim extensions.
23. (canceled)
24. (canceled)
25. The surf boat of claim 20, wherein lateral extension of a
starboard side water diverter creates a port side surf wake on said
port side of said boat and lateral extension of a port side water
diverter creates a starboard side surf wake on said starboard side
of said boat, said port and starboard side surf wakes different
from one another and different from a wake the surf boat makes when
traveling through water without said water diverters extended.
26. The surf boat of claim 20, configured to retract said wake
diverters when said boat travels through water above a
predetermined speed.
27. The surf wake system of claim 13, wherein the controller is
responsive to input from at least one of a driver, a rider, and an
operator.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent
application Ser. No. 13/545,969, filed Jul. 10, 2012, and titled
SURF WAKE SYSTEM FOR A WATERCRAFT, which claims the benefit under
35 U.S.C. .sctn.119(e) of U.S. Provisional Patent Application No.
61/559,069, filed Nov. 12, 2011, and titled SURF WAKE SYSTEM FOR A
WATERCRAFT. Each of the above-identified patent applications is
hereby incorporated by reference in its entirety and is made a part
of this specification for all that it discloses.
BACKGROUND
[0002] 1. Field of the Disclosure
[0003] This application relates, in general, to a wake system for a
watercraft, and more particularly, to a surf wake system for
modifying a wake produced by a watercraft travelling through
water.
[0004] 2. Description of the Related Art
[0005] Wake surfing has become increasingly popular in recent years
because, unlike an ocean wave, a wake produced by a watercraft is
on-demand not to mention continuous and endless as long as the
watercraft is moving forward. As a watercraft travels through
water, the watercraft displaces water and thus generates waves
including bow wave and diverging stern waves on both sides of the
watercraft. Due to pressure differences, these waves generally
converge in the hollow formed behind the traveling watercraft
and/or interfere with each other to form a wake behind the
watercraft. Such a wake, however, is generally small, choppy or too
close to the watercraft to be suitable and safe for water sports,
and particularly not suitable for wake boarding or surfing.
[0006] To facilitate surfing, a wake should be formed away from the
stern of the watercraft, for example, about ten feet away, and with
a waist-height peak, for example, about three feet or higher.
Generally hundreds, and sometimes thousands, of pounds of
additional weight or ballast to a rear corner of the watercraft to
make the watercraft tilt to one side, displaces more water, and
hence generates a larger wake on that side. Such additional weight
may be in the form of removable ballast bags, installed ballast
tanks or bladders, or passengers positioned to one side of the
watercraft, which is primarily used to tip the watercraft to that
side. Using such additional weight to produce larger wakes,
however, poses several disadvantages. For example, such additional
weight may take up significant space and capacity that may
otherwise reduce the passenger capacity of the watercraft. Also,
such additional weight may unbalance the watercraft creating
difficulties in control. Moreover, the additional weight generally
must be moved from one side of the water craft to the other in
order to generate a wake on the other side of the water craft.
Shifting such additional weight may require significant time and
effort. For example, filling and emptying ballast tanks to switch
from one side to the other may require 20 minutes or more.
[0007] Alternatively, it is known to require extensive modification
to a boat hull to promote a proper surf wake. An exemplar of
generating a larger wake can be found in a U.S. Pat. No. 6,105,527
to Lochtefeld et al.
[0008] In light of the foregoing, it would therefore be useful to
provide surf wake system that overcomes the above and other
disadvantages.
SUMMARY
[0009] One aspect of the present invention is directed to a surf
wake system for modifying a wake formed by a watercraft travelling
through water. The surf wake system may include a pair of upright
water diverters including a port diverter and a starboard diverter,
each independently movable from a neutral position to a deployed
position in which a respective water diverter extends outboard of a
transom of the watercraft to deflect water traveling along a hull
of the watercraft and past the transom. Positioning the port
diverter in its deployed position while the starboard diverter is
in its neutral position modifies the wake to provide a starboard
surf wake, and positioning the starboard diverter in its deployed
position while the port diverter is in its neutral position
modifies the wake to provide a port surf wake.
[0010] In the deployed position, the respective water diverter may
extend outboard beyond a side strake of the watercraft to deflect
water traveling along the side strake and past the transom.
[0011] Each upright water diverter may be pivotally mounted to the
watercraft adjacent the transom or a respective side strake.
[0012] Each upright water diverter may be pivotally mounted to
directly to the transom or a respective side strake.
[0013] The surf wake system may include a plurality of positioners
operably connected to a respective water diverter for positioning
the respective water diverter relative to a longitudinal axis of
the watercraft.
[0014] At least one of the plurality of positioners may be a linear
actuator configured to selectively move a respective water diverter
between its neutral and extended positions.
[0015] Another aspect of the present invention is directed to a
surf wake system including a flap for deflecting water traveling
past a transom of the watercraft, a hinge for pivotally mounting
the flap relative to the watercraft, the hinge having a pivot axis
extending adjacent and along a side edge of the transom, and a
positioner operably connected to the flap for positioning the flap
relative to a longitudinal axis of the watercraft between a neutral
position and an outward position.
[0016] The flap may include a substantially planar member.
[0017] The flap may be approximately 10-15 inches high and
approximately 15-20 inches long.
[0018] The flap may be formed of plastic, stainless steel, wood
and/or fiberglass.
[0019] The hinge may be a jointed device having a first member
pivotally affixed to a second member by a pin, wherein the first
member is affixed to the watercraft and the second member is
affixed to the flap.
[0020] The second member may be monolithically formed with the
flap.
[0021] The actuator may be dimensioned and configured to pivotally
move and position the flap between the neutral position, in which
the flap pulls inboard, and the extended position, in which the
flap extends outboard.
[0022] The flap may extend outboard at least approximately
5-15.degree. relative to a longitudinal axis of the watercraft.
[0023] The surf wake system may include a manual actuator to
selectively position the flap.
[0024] The surf wake system may include a controller installed
within the watercraft and operably connected to the actuator to
selectively position the flap.
[0025] The controller may include a display panel for displaying an
indication of a position of the flap.
[0026] The surf wake system may include a plurality of flaps and
hinges, each flap pivotally mounted to the watercraft by a
respective hinge.
[0027] The plurality of flaps may include a port flap and a
starboard flap, each mounted adjacent respective port side and
starboard side edges.
[0028] The positioner may include a plurality of actuators each
secured on the watercraft and operably connected to a respective
one of the plurality of flaps.
[0029] The surf wake system may include a controller installed
within the watercraft and operably connected to the plurality of
the actuators to selectively position the plurality of the
flaps.
[0030] In various embodiments, positioning the port flap in the
outward position and the starboard flap in the neutral position
enhances a right surf wake, and wherein positioning the starboard
flap in the outward position and the port flap in the neutral
position enhances a left surfing wake.
[0031] The methods and apparatuses of the present invention have
other features and advantages which will be apparent from or are
set forth in more detail in the accompanying drawings, which are
incorporated herein, and the following Detailed Description, which
together serve to explain certain principles of the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] FIG. 1 is a rear perspective view of an exemplary surf wake
system including a pair of flap assemblies in accordance with
various aspects of the present invention.
[0033] FIG. 2 is an enlarged perspective view of one of the flap
assemblies of FIG. 1.
[0034] FIG. 3 is a schematic rear view of the exemplary surf wake
system of FIG. 1.
[0035] FIG. 4(a) and FIG. 4(b) are schematic views of the flap
assembly of FIG. 2 in extended and retracted positions,
respectively.
[0036] FIG. 5(a), FIG. 5(b) and FIG. 5(c) are schematic views of
the exemplary surf wake system of FIG. 1 in which the flap
assemblies are positioned for cruising, a starboard side surf wake,
and a port side surf wake, respectively.
[0037] FIG. 6(a), FIG. 6(b) and FIG. 6(c) illustrate conventional,
starboard surf, and port surf wakes, respectively, as produced by
the surf wake system of FIG. 1.
[0038] FIG. 7 is a perspective view of an exemplary cockpit of a
watercraft incorporating a surf wake system including an input
controller for operation of the surf wake system.
[0039] FIG. 8(a), FIG. 8(b), FIG. 8(c), FIG. 8(d), FIG. 8(e) and
FIG. 8(f) are exemplary screen shots of the input controller of
FIG. 7.
[0040] FIG. 9 is a schematic view of an exemplary control system of
a surf wake system in accordance with the present invention.
[0041] FIG. 10 is a rear perspective view of an exemplary surf wake
system including contoured flap assemblies with a complementary
swim platform in accordance with various aspects of the present
invention.
[0042] FIG. 11 is a side view of the exemplary surf wake system of
FIG. 10.
[0043] FIG. 12(a) and FIG. 12(b) are a rear and plan views of an
exemplary surf wake system including a flap assembly integrated
with a complementary swim platform in accordance with various
aspects of the present invention.
[0044] FIG. 13(a), FIG. 13(b) FIG. 13(c) are schematic plan views
illustrating the operation of the exemplary surf wake system in
accordance with various aspects of the present invention.
[0045] FIG. 14(a) and FIG. 14(b) are rear and side views of another
exemplary flap assembly in accordance with various aspects of the
present invention.
[0046] FIG. 15(a), FIG. 15(b) and FIG. 15(c) are side and top views
of other exemplary flap assemblies in accordance with various
aspects of the present invention.
[0047] FIG. 16(a) and FIG. 16(b) are rear perspective and rear
elevation views, respectively of another exemplary flap assembly
integrated with a complementary swim platform in accordance with
various aspects of the present invention.
[0048] FIG. 17 is a schematic view of an exemplary surf wake system
including side-hull flap assemblies in accordance with various
aspects of the present invention.
[0049] FIG. 18 is a schematic view of an exemplary surf wake system
including longitudinally extendable flap assemblies in accordance
with various aspects of the present invention.
DETAILED DESCRIPTION OF CERTAIN EMBODIMENTS
[0050] Reference will now be made in detail to various embodiments
of the present invention(s), examples of which are illustrated in
the accompanying drawings and described below. While the
invention(s) will be described in conjunction with exemplary
embodiments, it will be understood that present description is not
intended to limit the invention(s) to those exemplary embodiments.
On the contrary, the invention(s) is/are intended to cover not only
the exemplary embodiments, but also various alternatives,
modifications, equivalents and other embodiments, which may be
included within the spirit and scope of the invention as defined by
the appended claims.
[0051] Generally, the present invention relates to a surf wake
system for a watercraft that is concerned with flow management of
water passing the stern as the water craft is moving forward
through a body of water, so that water is directed in such a manner
to enhance size, shape and/or other characteristics the resulting
wake of the watercraft. As will become apparent below, the surf
wake system of the watercraft allows diversion of water passing
along one side of the stern away from the usual converging area
immediately behind the transom of the watercraft, so that the
diverging water will enhance the resulting wake on the opposing
side of the watercraft. In doing so, the surf wake system of the
present invention allows the enhancement of wake without
significant pitching or leaning of the watercraft to one side or
the other.
[0052] Turning now to the drawings, wherein like components are
designated by like reference numerals throughout the various
figures, attention is directed to FIG. 1 which illustrates a
watercraft 30 equipped a surf wake system 32 for modifying a wake
formed by the watercraft travelling through water. Advantageously,
the surf wake system may enhance surf wakes with or without
supplemental ballast and thus it is possible to enhance wake with
less watercraft lean. The surf wake system of the present invention
in general includes one or more water diverters 33, each water
diverter is adjustably mounted relative to the watercraft for
deflecting water travelling past a transom 35 of the watercraft.
Broadly, the water diverters are movably mounted with respect to
transom 35.
[0053] In the illustrated embodiment, the water diverters are in
the form of flaps 33, pivotally mounted on respective hinges 37,
which have a pivot axis 39 extending adjacent and along a side edge
40 of the transom. Although the illustrated embodiment shows the
flaps mounted directly on the transom, one will appreciate that the
flaps may be moveably mounted directly or indirectly to the
transom. For example, the flaps and associated hardware may be
mounted on a removable swim platform other structure that is
mounted on or adjacent the transom.
[0054] As also shown in FIG. 1, watercraft 30 may be equipped with
a wake-modifying device 42 to enhance the overall size of the wake
formed by the watercraft. One such device is sold by Malibu Boats
as the Power Wedge, which is similar to that described in U.S. Pat.
No. 7,140,318, the entire content of which is incorporated herein
for all purposes by this reference. Another such device may
incorporate pivotal centerline fins of the type developed by Malibu
Boats and described in U.S. Patent Application No. 61/535,438, the
entire content of which is also incorporated herein for all
purposes by this reference. One will appreciate that, while various
other wake modifying devices may be very beneficial in enhancing
the size and shape of a wake, such other wake modifying devices
need not be used, nor is essential to be used, in combination with
the surf wake system of the present invention. Similarly, one will
appreciate that positioning extra weight or ballast adjacent the
transom may also be very beneficial in enhancing the size of a
wake, with or without the use of a wake modifying device, however,
such weight or ballast need not be used, nor is essential to be
used, in combination with the surf wake system of the present
invention.
[0055] Turning now to FIG. 3, a side edge is the intersection of
the transom with either a port side strake 44p or a starboard side
strake 44ps, wherein the suffixes "p" and "s" represent features on
the port side and the starboard side, respectively. Therefore, the
intersection of the transom with the port side strake is referred
to as the port side edge 40p and the intersection of the transom
with the starboard side strake is referred to as the starboard side
edge 40s. Accordingly, a port side flap 33,p refers to a flap
adjacent the port side edge, and a starboard side flap 33,s refers
to a flap adjacent the starboard side edge.
[0056] In general, a distance L between a respective pivot axis and
the side edge is less than the longest dimension of the flap in
order to allow the flap to extend parallel to the side strake of
the hull or beyond. The distance is preferably less than 10-5
inches and more preferably less than 5 inches. That is, the flaps
are positioned away from an imaginary center line or longitudinal
axis of the watercraft and adjacent a respective port side or
starboard side.
[0057] For illustration purposes, the pivot axis of the hinge shown
in this application is drawn parallel to the corresponding side
edge. One will appreciate that the pivot axis does not necessary
need to be parallel to the corresponding side edge. One will also
appreciate that the pivot axis may be substantially vertical,
substantially parallel to the side edge, some other angle
therebetween, or some angle slightly inclined with respect to the
side edge. Preferably the angle between the pivot axis and the side
edge is less than approximately 15.degree., more preferably less
than 10.degree., and even more preferably less than 5.degree..
[0058] With reference to FIG. 1 and FIG. 2, the surf wake system
also includes one or more positioners or actuators 46, each secured
on the watercraft and operably connected to a respective flap 33.
In the illustrated embodiment, the actuators are linear actuators
including electric motors. However, one will appreciate that other
suitable actuators may be employed to move the flaps, including
hydraulic and pneumatic motors. Preferably the actuators are
watertight or water resistant, and more preferably waterproof. The
actuators are configured to pivot the flaps about their respective
pivot axis and position the flaps in different positions, as will
be discussed in greater detail below. One will also appreciate that
manual actuators or positioners may be utilized to secure the flaps
in a desired position.
[0059] In various embodiments, the actuators may be electric
actuators of the type manufactured by Lenco Marine Inc. which
include a linearly-extendable threaded rod assembly driven by a
step motor. In various embodiments, the actuator may be configured
to move between an inner retracted position and an outer extended
position, while in other embodiments, the actuators are configured
to also move to one or more interim positions, for example, every
5.degree., 10.degree., 15.degree., etc. By activating the actuator
for predetermined periods of time, the actuator may be accurately
and repeatedly controlled to move to the desired position. One will
appreciate that the actuator may be configured to accommodate a
wide variety of angular ranges as well as interim positions.
[0060] One will also appreciate that other actuators may be
utilized in accordance with the present invention. For example.
hydraulic and pneumatic actuators may be used, as well as manual
actuators.
[0061] Turning now to FIG. 4(a) and FIG. 4(b), port side flap 33,p
is shown in two different positions, namely an outward position in
FIG. 4(a) and a neutral position in FIG. 4(b). As illustrated, the
flap in the outward position extends away from a longitudinal axis
47 of watercraft 30 as the flap moves in the direction illustrated
by arrow A. In the illustrated embodiment, the flap and has at
least a portion of the flap extending outwardly beyond the side
strake and the transom. In the neutral position, the flap extends
toward the center line as it moves in the direction illustrated by
arrow B and is located behind the transom and inboard of the side
strake 44p. In various embodiments of the present invention, the
flap has an angle .theta.1 of approximately 0.degree. to
45.degree., preferably between 5.degree. to 30.degree., and more
preferably 5.degree. to 15.degree. relative to the longitudinal
axis of the watercraft when the flap extends to its outermost
position, and has an angle .theta.2 of approximately 0 to
-90.degree., preferably -15.degree. to -30.degree. relative to the
longitudinal axis when the flap extends in its innermost position.
One will also appreciate that system may be configured to allow the
flap to laterally extend beyond the side strake substantially
perpendicular to the longitudinal axis of the watercraft in order
to redirect and/or deflect water passing along the water craft as
it moves beyond the transom. Alternatively, one will appreciate
that the flap may extend parallel to the longitudinal axis to
direct water straight back and prevent water from flowing directly
behind the transom. While extending the flap beyond the side strake
will likely delay convergence of water to a greater degree (as will
become apparent below), extending the flap parallel to the
longitudinal axis may sufficiently delay convergence of water to
produce a desired waveform.
[0062] One will appreciate that the surf wake system of the present
invention may be configured to hold the flaps in one or more
interim positions between their respective outward and neutral
positions. For example, the surf wake system may be configured to
hold the flaps at 0.degree., 5.degree., 10.degree., 15.degree.,
20.degree., 25.degree., 30.degree. and etc. relative to the
centerline. Such interim positions may allow the system to further
modify or incrementally modify the resulting wake, and may thus
accommodate surfer preferences. For example, such interim positions
may more precisely shape the wake to accommodate for specific
watercraft setup, watercraft speed, watercraft weight, passenger
weight variances and distributions, and other variables to provide
a desired wake shape and waveform. Moreover, a number of interim
positions may optimize waveform for various other parameters such
user preferences. For example, experienced surfers may prefer
larger faster wakes, while novice surfers may want a smaller,
slower manageable wake.
[0063] As a watercraft travels through water, the watercraft
displaces water and generates waves including bow waves and
diverging stern waves. Due to pressure differences and other
phenomena, these waves generally converge in the hollow formed
behind the watercraft and interfere with each other to form an
otherwise conventional wake behind the watercraft, such as that
shown in FIG. 6(a). As noted above, such a wake is generally small,
choppy or too close to the watercraft to be suitable and safe for
water sports, and particularly not suitable for wake surfing.
[0064] By moving a flap of the present invention to an outward
position, however, water is redirected, which may lead to
constructive interference to form a larger wake having a higher
peak and a smoother face, which wake is conducive for surfing. In
addition, the flap may redirect water so that the larger wake is
formed further away from the watercraft, and thus creating a safer
environment for surfing. Moreover, by placing the flaps along the
side edges, the watercraft can generate a suitable surfing wake
with less tilt or lean to one side, thus making the watercraft
easier to control. One will appreciate that the flaps may enhance
wake shape and size with or without the use of significant
additional weight or ballast located toward the rear corners of the
watercraft. Other advantages will become apparent later on in the
description of the operation of the present invention.
[0065] In various embodiments of the present invention, the wake
system may include one or more flap assemblies, for example, one or
more port flap assemblies, and/or one or more starboard flap
assemblies may be used. Preferably, the wake system is configured
and positioned to have one flap and corresponding hinge immediately
adjacent each of the port side edge and the starboard side
edge.
[0066] In various embodiments of the present invention, the flap is
a substantially planar member, as can be seen in FIG. 2. The flap
is generally dimensioned and configured such that the top of the
flap is located within the resting freeboard distance (i.e., the
distance between the waterline and the gunwale) and will be located
approximately at the waterline while the watercraft is at use
accommodating for both watercraft speed and displacement with
additional ballast and/or passenger weight.
[0067] In the illustrated embodiment, the flap is approximately 14
inches high, approximately 17 inches long and approximately 3/4
inch thick. One will appreciate that the actual dimensions of the
flap may vary. Preferably, the flap is approximately 10-18 inches
high, approximately 12-22 inches long, and approximately 1/2 to
11/4 inches thick, and more preferably approximately 12-16 inches
high, 15-19 inches long, and 3/4 to 1 inch thick. One will
appreciate that the deeper the flap extends below the waterline,
the more water will be diverted.
[0068] In addition, one will appreciate that the flap need not be
planar and its actual dimensions will vary depending on the size of
the watercraft, the demand of the type of the wake and/or other
factors. Other suitable configurations and sizes can be employed,
including curved surfaces, curved edges, different geometric
profiles, and/or different surface textures. The flap can be made
of plastic, stainless steel, fiberglass, composites, and/or other
suitable materials. For example, the flap may be formed of
gelcoated fiberglass and/or stainless trim plate.
[0069] As shown in FIG. 4, in the illustrated embodiment, hinge 37,
is a jointed device having a first hinge member 49 pivotally
affixed to a second hinge member 51 by a pin 53. First member 49 is
affixed to the watercraft and second member 51 is affixed to flap
33. One will appreciate that other hinge devices may be utilized.
For example, the hinge may include a flexible member allowing
relative pivotal motion instead of a pinned joint. In addition,
various configurations may be utilized. For example, the second
member may be monolithically formed with the flap.
[0070] Turning back to FIG. 3, wake system 32 may include a
controller 54 that is operationally connected to actuators 46, of
the wake system, which actuators selectively control the positions
of respective flaps 33.
[0071] An exemplary method of operating the surf wake system in
exemplary embodiments of the present invention will be explained
with reference to FIGS. 5-8. A pair of flaps 33,p, 33,s with their
respective hinges 37,p, 37,s and actuators 46,p, 46,s are installed
on transom 35 of the watercraft adjacent respective side edges 40,
one on the port side and the other on the starboard side of the
watercraft. One will appreciate that the present invention is not
limited to this specific configuration. The number of the flaps and
the positions thereof can be varied as noted previously.
[0072] As shown in FIG. 5(a), both flaps are retracted and
positioned in their neutral positions behind transom 35, and not
extending outward or outboard form their respective port and
starboard side strakes 44pp, 44ps. At such positions, the flaps in
general do not interference with the waves generated by the
watercraft travelling through water, and hence have no or
negligible effects on the wake, and thus the flaps can be
positioned in such configuration for cruising. As shown in FIG.
6(a), having the flaps positioned in the manner illustrated in FIG.
5 does not redirect water passing by the transom that thus produces
an otherwise conventional wake, that is, one without a smooth face
or a high peak, and is thus suitable for surfing.
[0073] Turning to FIG. 5(b), when a starboard surf wake is desired,
port side flap 33,p is positioned in an outward position while the
starboard side flap 33,s remains in a neutral position. Since the
port side flap is in an outward position and thus extends beyond
the port side strake 44pp, waves on the port side are redirected,
which facilitates constructive interference of converging waves to
form a larger starboard wake with a higher peak and smoother face
that is suitable for starboard surfing, such as that shown in FIG.
6(b) Comparing to the non-enhanced wake of FIG. 6(a) with the
starboard wake shown in FIG. 6(b), it is evident that surf wake
system 32 modified and/or enhanced the wake with a smooth face and
a relatively high peak. As can be seen in FIG. 6(b), waist-high
peaks of three or four feet are attainable, thus providing a
reproducible wake that is suitable for surfing.
[0074] Turning to FIG. 5(c), when a port side surf wake is desired,
starboard side flap 33,s is positioned in an outward position while
the port side flap 33,p remains in a neutral position. Now that the
starboard side flap is an outward position, the surf wake system, a
port side wake, such as that shown in FIG. 6(c) is produced in a
manner similar to that described above. Such configuration produces
a left side surf wake. Comparing to the non-enhanced wake of FIG.
6(a) with the port side wake shown in FIG. 6(c), it is evident that
surf wake system 32 modified and/or enhanced the port side wake
with a smooth face and a relatively high peak. As can be seen in
FIG. 6(c), waist-high peaks of three or four feet are attainable,
thus providing a reproducible wake that is suitable for
surfing.
[0075] As noted before, the watercraft equipped with the surf wake
system of the present invention can generate a suitable surfing
wake with or without adding significant extra weight at a rear
corner of the watercraft. As such, weight need not be moved from
one side to another, and thus no significant shifting of the
watercraft from one side to the other is not required, and thus
there are no significant changes to the handling of the watercraft.
The surf wake system of the present invention allows switching from
a port side wake to a starboard wake, or vice versa, on demand or
"on the fly" thus accommodating both regular (or natural) and goofy
surfers, as well as surfers that are sufficiently competent to
switch from a port side wake to a starboard wake while under way.
To this end, the controller is preferably configured to allow
operation of the actuators on-demand and on-the-fly.
[0076] In addition to modifying wakes for recreational purposes,
the water diverters of the surf wake system may be activated for
other purposes such as steering assist. For example, the port flap
may be actuated to provide turning assist to the left at gear idle,
and similarly the starboard flap actuated to provide turning assist
to the right. Thus, with an appropriate flap extended, the
watercraft may turn within a very small radius around a fallen
skier, boarder or surfer. Also, it is sometimes difficult for
inboard watercraft to turn to left while moving backwards, the
flaps may be activated to assist in such maneuvering. One will
appreciate that the control system may be configured to utilize
input from the steering system and/or the drive system to determine
an appropriate level of "turning assist". For example, the control
system may be configured such that turning assist would only work
below a predetermined speed, for example 7 mph. One will also
appreciate that such turning assist may utilize controls that that
are integrated into the surf wake system, or alternatively, such
turning assist may utilize discrete controls to that are separately
activated in accordance with the needs of turning assistance.
[0077] Turning now to FIG. 7, watercraft 30 includes an otherwise
conventional steering wheel 56 and throttle control 58 and
instrument panel bearing a tachometer 60 and speedometer 61. In
addition, the water craft includes a multipurpose graphical display
63 and/or a discrete input device 65. The graphic display and the
touch screen are operably connected to or integrated with
controller 54. In the illustrated embodiment, the input device is a
discrete touch screen, however, one will appreciate that the
graphic display and the input device may be integrated into a
single device, for example, a single screen that is suitable for
both displaying information and receiving touch screen inputs.
Alternatively, a variety of switches, buttons and other input
devices may be utilized instead of, or in addition to, a touch
screen device.
[0078] Display 63 is configured to convey a variety of desired
information such as speed of the watercraft, water depth, and/or
other useful information concerning the watercraft and operation
thereof including, but not limited to, various service alerts, such
as low oil pressure, low battery voltage, etc., and/or operational
alerts such as shallow water, bilge pump status, etc.
[0079] Input device 65. is primarily configured to receive a
variety of input commands from the watercraft operator. In
accordance with the present invention, and with reference to FIG.
8(a), the input display includes a SURF GATE center which serves as
input control for operation of surf wake system 32. As shown, the
input control may include buttons 67 to activate surf wake system
32 to generate a surfable wake on the left portside or on the right
starboard side. For example, if the operator chooses to generate a
portside surfable wake, the operator may select button 67L, which
in turn would cause controller 54 to extend flap 33,R to generate a
left port side wake in the manner described above. And the operator
may similarly press button 67R to generate a right starboard side
surfable wake. In accordance with the present invention, an
operator may reconfigure the watercraft to switch from a left surf
wake mode to a right surf wake mode by pressing a single
button.
[0080] One will appreciate that other suitable input means may be
utilized to activate the flaps. For example, a graphic or virtual
slide assembly may be provided to activate the flaps as to the
desired degree left or right, or a plurality of graphic or virtual
buttons may be provided to activate the flaps to the desired degree
left or right. In addition, one will appreciate that mechanical
and/or electromechanical switches and input devices may also be
used to activate the flaps as desired.
[0081] With reference to FIG. 8(a) through FIG. 8(f), input device
65. serve as an input device for other watercraft systems such as
Malibu Boats' POWER WEDGE system, ballast tank systems (see, e.g.,
FIG. 8(c)), lighting systems (see, e.g., FIG. 8(d)), etc.
[0082] Also, input device 65. may also provide various alerts
regarding the operation of the surf wake system. For example, FIG.
8(a) illustrates an operational alert that the once activated, surf
wake system will extend above 7 mph and retract under 7 mph. One
will appreciate that the surf wake system may be configured to
operate only within various speeds deemed suitable for surfing, and
may vary from 7 mph. FIG. 8(b) illustrates a general error alert,
FIG. 8(c) through FIG. 8(f) illustrate a maximum current warnings
for various stages of flap operation to alert the operator of
excessive resistance in moving the flaps form one position to
another.
[0083] In various embodiments, the surf wake system can be
configured with various safety features which limit operation
and/or alert the driver to various situations. For example, the
system may be configured to provide a visual and/or audible alarm
to alert the operator when the watercraft is traveling faster than
a predetermined speed, for example 15 mph.
[0084] FIG. 9 is a schematic of an exemplary control system 68 in
which the user interface, in the illustrated embodiment, input
device 65. communicates with controller 54 in order to control flow
management by operating associated wave shaper(s), (e.g., flaps 33,
and actuators 46,). As illustrated and as noted above, input device
65. may also be configured to control other watercraft systems
including Malibu Boats' POWER WEDGE system, ballast tank
systems.
[0085] Control system 32 may also include a memory that is
configured to store information regarding watercraft configuration
including static parameters such as hull shape, hull length,
weight, etc., as well as dynamic parameters passenger weight,
ballast, wedge, speed, fuel, depth, wind, etc. The memory may also
include "Rider" information regarding the surfer (or boarder or
skier), including goofy/regular footed, weight, board length, board
type, skill level, etc. Moreover, the memory may be configured to
store "presets" that include the information regarding a specific
"Rider" including the Rider information as well as the Rider's
preferences such as left or right wave, a preferred watercraft
speed, a preferred wake height, etc. One will appreciate that the
presets could be for the surf wake system as well as other
parameters including POWER WEDGE setting, watercraft speed,
goofy/regular footed, steep wave face, amount of weight, wave size,
etc. One will appreciate that such presets would allow the
watercraft operator to quickly reconfigure the surf wake system to
accommodate various "Riders", for example very experienced
professional wake surfers, beginner wake surfers, and anyone in
between.
[0086] Control system 32 may also include a remote which may allow
a rider to actuate the surf wake system. For example, a remote may
allow a rider to further deploy or retract flap 33, to an interim
position to vary the size of the wake.
[0087] One will appreciate that control system 32 may be integrated
into the watercraft, for example, fully integrated with a CAN bus
of the watercraft. Alternatively, the control system may be an
aftermarket solution which may be installed on a watercraft, either
connecting into the CAN bus, or operating completely independently
of the CAN bus.
[0088] Turning now to FIG. 10 and FIG. 11, surf wake system 32 may
be utilized with a swim platform 70. In the illustrated embodiment,
the swim platform includes tapered sides 72 having recessed notches
74 which provide space to receive flaps 33, therein. Such tapered
sides and notches allow for flaps 33, to return to neutral
positions which have little to no effect on the wake, while
allowing for a larger surface area of the swim platform. In the
illustrated embodiment, the tapered sides extend inwardly
approximately 15-30.degree. from the longitudinal axis, however,
one will appreciate that actual angle that the tapered sides angle
in may vary, for example, up to approximately 45.degree.. Also,
although the depth of the notch is approximately equal to the
thickness of the corresponding flap, one will appreciate that the
actual dimensions of the notch may vary.
[0089] As shown in FIG. 10, the swim platform has rounded corners
75 which are also configured to diminish the effect the swim
platform has on the resulting wake. In this regard, the rounded
corners lessen the amount of swim platform that contacts water
flowing behind the transom, and thus lessens any adverse effect the
swim platform may have on the modified wake.
[0090] Turning now to FIG. 12(a) and FIG. 12(b), surf wake system
32 is mostly integrated into a swim platform and can thus be
readily installed on an existing watercraft in the form of an
aftermarket kit. In various embodiments, swim platform 70 may be
mounted to a watercraft in an otherwise conventional fashion, but
unlike conventional swim platforms, swim platform 70 includes
integrated flaps 33, hinges 37, and actuators 46, in which the
integrated assembly may be mounted onto a watercraft in much the
same manner as an otherwise conventional swim platform. In the
illustrated embodiment, actuators 46, are manually adjustable in
the form of a telescopic rod assembly which may be secured in
various lengths, for example, by a link pin extending through one
of a plurality of holes 53, or by other suitable means. Thus, in
various embodiments, the surf wake system of the present invention
may be a substantially mechanical system in which the angles of
flaps 33, are manually set by the user.
[0091] In the illustrated embodiment, the actuators are mounted on
the swim platform to selectively deploy the flaps, however, one
will appreciate that the actuators may be mounted on the
transom.
[0092] One will also appreciate that actuators 46, may be automated
in a manner similar to that described above, for example, the
actuators may be electric, electromechanical, pneumatic and/or
hydraulic actuators as described above. In the case that the
actuators are automated, the actuators may be integrated with the
watercraft's existing control system (e.g., by connecting to the
CAN bus of the watercraft), or a dedicated control system may be
installed to control the actuators that is completely independent
of the watercrafts other systems. For example, the control system
may include toggle switches or other suitable devices to
selectively move actuators 46, and flaps 33, as desired.
[0093] In operation and use, swim platform 70 functions in the same
manner as that described above. The neutral position of surf wake
system 32 is shown in FIG. 13(a) in which flaps 33, are in their
neutral, retracted position. In this position, the flow of water
past the transom is unimpeded by the flaps and the water is allowed
to converge at it is natural intersection relatively close to the
transom. When a surfable starboard side wake is desired, the
operator may deploy the port side flap 33,p as shown in FIG. 13(b).
In this position, the flow of water along the port side past the
transom is disrupted such that the flow of water is redirected
outwardly and/or rearwardly thereby delaying convergence of the
port side flow with starboard side flow to a point further from the
transom. Such disruption and redirection facilitates constructive
interference of converging waves to form a larger starboard wake
with a higher peak and smoother face that is suitable for starboard
surfing, such as the waveform shown in FIG. 6(b).
[0094] Similarly, when a surfable port side wake is desired, the
operator may deploy the starboard side flap 33,s as shown in FIG.
13(c). In this position, the flow of water along the starboard side
past the transom is disrupted such that the flow of water is
redirected outwardly and/or rearwardly thereby delaying convergence
of the starboard side flow with the port side flow to a point
further from the transom, which facilitates constructive
interference of converging waves to form a larger portside wake
with a higher peak and smoother face that is suitable for starboard
surfing, such as the waveform shown in FIG. 6(c).
[0095] In various embodiments and as noted above, the size and
shape of the flaps may vary depending upon varies factors. One such
variation is illustrated in FIG. 14(a) and FIG. 14(b), which shows
a channeled flap 33, having a series of parallel horizontally
extending channels 77. The channels are on the outboard side of the
flap and extend linear to the direction of watercraft travel. The
channels may assist in creating laminar flow across the gate, thus
producing a cleaner waveform.
[0096] In the illustrated embodiment, the flap includes five
channels, however, one will appreciate that one, two, three or more
channels may be utilized to redirect the flow of water as desired.
One will also appreciate that the channel need not be linear or
horizontal. For example, the channels may extend at an incline
upwardly away from transom 35 to direct the flow of water upwardly
as it flows along the surface of flap 33, which may provide a net
downward force on the flap and, in turn, the transom to further
enhance displacement of the watercraft stern. Also, the channels
may be curved in order to gently redirect water upwardly or
downwardly. One will also appreciate that other patterns and/or
textured surfaces may also be utilized to manage the direction of
flow of water along the flap.
[0097] The peripheral shape of flap 33, is similar to that shown in
FIG. 10, as well as that shown in FIG. 15(a). Flap 33, includes a
transom indentation 79 a cross-spray protrusion 81. The transom
indentation allows for the flap to be positioned immediately
adjacent to the hull such that a minimal gap exists between the
transom and the flap, and thus promoting a smooth flow of water
along the hull and along the flap. One will appreciate that the
actual size and shape of the transom indentation may vary to
accommodate for a wide variety of hulls. The cross-spray protrusion
is provided to reduce the amount of water at the water line that is
inadvertently kicked up in the form of cross-spray, thus reducing
the amount of cross-spray formed by deployment of the flaps.
[0098] In various embodiments, the flaps may be planar or
non-planar. For example, FIG. 15(b) shows a convexly-flared flap
33, which allows water flow along the outer surface of the flap
that gently trails in towards the hull centerline, while FIG. 15(c)
shows a concave flap 33, that allows water flow along the outer
surface of the flap to be further redirected outward away from the
centerline of the hull. One will appreciate that curved flap may
effectively extend or otherwise adjust the range of deployment
allowing for the use of variously sized actuators. For example,
concave flaps may effectively extend the range of deployment such
that smaller displacement actuators may be used. Furthermore,
convex flaps may reduce face friction, promote laminar flow, or
otherwise enhance or modify the wake.
[0099] One will appreciate that other flap shapes and
configurations may also be utilized in accordance with the present
invention, including, but not limited to, oval shaped flaps, other
polygonal shapes, perforate surfaces, patterned surfaces, and etc.
One will also appreciate that the flaps may be replaceable and
interchangeable such that a user may replace flaps of one type with
flaps of another type in order to further customize the performance
of the surf wake system. Alternatively, supplemental "bolt-on"
shapes may be provided which can be attached to an existing flap to
further modify its overall shape.
[0100] In various embodiments, upper surfaces of the swim platform
may be hinged to facilitate the flow of water past the swim
platform. Conventional swim platforms generally impede waveform by
suppressing water flow on surf side when boat is rolled to the same
side. As shown in FIG. 16(a) and FIG. 16(b), swim platform 70 may
be provided with hinged surfaces 82 which are configured to pivot
up and away from flow of water as respective side of the swim
platform approaches the waterline. The hinged surfaces are designed
to allow only upward movement from the resting plan of the swim
platform. As shown in FIG. 16(b), hinged surface 82 is configured
to allow water forces to push the hinged portion up and away from
the flow of water creating the resulting surf wave. In the
illustrated embodiment, hinged surface 82 is pivotally attached to
a fixed main portion 84, whereby the hinged surface may pivot up
and not impede waveform. In the illustrated embodiment, the hinged
surface is pivotally attached to the fixed main portion by a hinge,
however, one will appreciate that other suitable means may be
utilized to allow the hinged portion to flex upwardly. One will
appreciate that swim platform 70 and hinged surfaces 82 may be used
in conjunction or separate from the surf wake system of the present
invention.
[0101] In another exemplary embodiment of the present invention,
surf wake system 32 is similar to the systems described above but
includes flaps 33, that are mounted on the side of the hull instead
of the transom, as shown in FIG. 17. In this embodiment, the
actuators are mounted on an appropriate section of the hull to
effect deployment from a neutral position, as illustrated by flap
33,p, to an extended deployed position, as illustrated by flap
33,s. In a manner similar to the systems described above, deploying
a flap will disrupt the flow of water along the side of the hull
past the transom such that the flow of water is redirected
outwardly and/or rearwardly to facilitate constructive interference
of converging waves in a manner that is described above with
respect to FIG. 13(b) and FIG. 13(c).
[0102] One will appreciate that the various flap and actuator
configurations described above may be utilized with a hull-side
configuration.
[0103] In still another exemplary embodiment of the present
invention, surf wake system 32 is similar to the systems described
above but includes flaps 33, that are mounted to extend rearward of
transom 35, as shown in FIG. 18. Flaps may be mounted to slide
along a track assembly 86 mounted on the side of the hull, or
alternatively, may be configured to extend directly outwardly from
the hull. In this embodiment, actuators (not shown) are mounted on
an appropriate section of the hull or track assembly to effect
deployment from a neutral position, as illustrated by flap 33,p, to
an extended deployed position, as illustrated by flap 33,s. In a
manner similar to the systems described above, deploying a flap
will disrupt the flow of water along the side of the hull past the
transom such that the flow of water is redirected rearwardly to
facilitate constructive interference of converging waves in a
manner that is described above with respect to FIG. 13(b) and FIG.
13(c).
[0104] One will appreciate that the various flap and actuator
configurations described above may also be utilized with such a
retractable flap configuration.
[0105] For convenience in explanation and accurate definition in
the appended claims, the terms "inward" and "outward", "inboard"
and "outboard", and etc. are used to describe features of the
exemplary embodiments with reference to the positions of such
features as displayed in the figures.
[0106] The foregoing descriptions of specific exemplary embodiments
of the present invention have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described in order to explain certain principles of
the invention and their practical application, to thereby enable
others skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the invention be defined by the Claims appended hereto and
their equivalents.
* * * * *