U.S. patent application number 12/878359 was filed with the patent office on 2011-03-10 for aquatic device.
This patent application is currently assigned to Heather PRITCHARD. Invention is credited to Walter John Edwards, Heather Pritchard, Matthew Lee Roe.
Application Number | 20110056424 12/878359 |
Document ID | / |
Family ID | 38188132 |
Filed Date | 2011-03-10 |
United States Patent
Application |
20110056424 |
Kind Code |
A1 |
Pritchard; Heather ; et
al. |
March 10, 2011 |
AQUATIC DEVICE
Abstract
An aquatic device (10) for providing maneuverability to a user
(11) moving in water. The aquatic device (10) may be propelled
through the water in any appropriate way, such as by being towed
through the water or propelled through the water by the user (11).
The aquatic device (10) comprises a handle means (20) adapted to be
grasped by the user (11) with arms extending forwardly, and two
fins (21, 22) movable one with respect of one to the other to
manoeuvre the aquatic device. The aquatic device (10) can be
maneuvered through movement of the fins (21, 22) to provide
directional control or variation to the orientation of the aquatic
device. The directional control may include both steering and depth
control. The handle means (20) are operably connected to the two
fins (21, 22) whereby the user can manually control movement of the
fins one with respect to the other.
Inventors: |
Pritchard; Heather;
(Ballajura, AU) ; Edwards; Walter John; (Floreat,
AU) ; Roe; Matthew Lee; (Duncraig, AU) |
Assignee: |
Heather PRITCHARD
Ballajura
AU
|
Family ID: |
38188132 |
Appl. No.: |
12/878359 |
Filed: |
September 9, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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12144393 |
Jun 23, 2008 |
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12878359 |
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PCT/AU2006/001862 |
Dec 7, 2006 |
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12144393 |
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Current U.S.
Class: |
114/242 ;
114/249; 441/56 |
Current CPC
Class: |
B63B 34/00 20200201;
B63B 32/20 20200201 |
Class at
Publication: |
114/242 ; 441/56;
114/249 |
International
Class: |
B63B 21/56 20060101
B63B021/56; A63B 31/12 20060101 A63B031/12 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 23, 2005 |
AU |
2005907264 |
Claims
1. An aquatic device comprising handle means adapted to be grasped
by a user, and two control elements moveable one with respect to
the other to manoeuvre the aquatic device.
2. An aquatic device according to claim 1 wherein the control
elements comprise fins.
3. An aquatic device according to claim 2 wherein each fin
comprises a leading end, a trailing end, and upper and lower
control surfaces therebetween.
4. An aquatic device according to claim 3 wherein the upper and
lower control surfaces taper inwardly with respect to each other in
the direction towards the trailing end.
5. An aquatic device according to claim 3 wherein the leading end
is profiled to facilitate movement through the water.
6. An aquatic device according to claim 1 wherein the handle means
are operably connected to the two control elements whereby the user
can manually control movement of the control elements one with
respect to the other.
7. An aquatic device according to claim 1 wherein the control
elements are pivotally moveable with respect to each other.
8. An aquatic device according to claim 7 wherein the control
elements are movable about a common pivot axis.
9. An aquatic device according to claim 8 the common axis is
generally transverse to the direction of travel.
10. An aquatic device according to claim 7 wherein the pivot axis
is generally horizontal when the aquatic device is travelling in a
generally horizontal straight line direction.
11. An aquatic device according to claim 1 wherein the handle means
comprises two handles each connected to a respective one of the
control elements.
12. An aquatic device according to claim 11 wherein the two control
elements are disposed adjacent each other and the two handles are
located laterally outwardly thereof.
13. An aquatic device according to claim 11 wherein the two handles
are disposed adjacent each other and the two control elements are
located laterally outwardly thereof.
14. An aquatic device according to claim 11 wherein the relative
positions of the handles with respect to the control elements are
selectively variable between an arrangement in which the two
control elements are disposed adjacent each other and the two
handles are located laterally outwardly thereof and an arrangement
in which the two handles are disposed adjacent each other and the
two control elements located laterally outwardly thereof.
15. An aquatic device according to claim 11 further comprising an
axle, each control element and the respective handle connected
thereto being rotatably supported on the axle.
16. An aquatic device according to claim 16 wherein the control
elements and the handles are removable from the axle.
17. An aquatic device according to claim 1 adapted to be towed
through the water.
18. An aquatic device according to claim 17 further comprising a
connection means for attachment to a tow line.
19. An aquatic device according to claim 18 wherein the connection
means is associated with the axle.
20. An aquatic device according to claim 19 wherein the connection
means comprises a bridle having sections extending from each end of
the axle.
21. An aquatic device according to claim 19 wherein the connection
means comprises a coupling on the axle, the coupling being so
located that there is a respective control element and handle to
each side thereof.
22. An aquatic device according to claim 1 adapted to be propelled
through the water by the user.
23. An aquatic device according to claim 1 further comprising an
on-board propulsion system.
24. An aquatic device for towing a user through a body of water,
the aquatic device comprising handle means adapted to be grasped by
the user, and two control elements moveable one with respect to the
other for directional control of the device.
25. An aquatic device according to claim 1 wherein each control
element is configured to guide water flow with respect to the
control surface.
26. An aquatic device according to claim 25 wherein each control
element comprises protrusions extending from either or both of the
upper and lower control surfaces.
27. An aquatic device according to claim 26 wherein the protrusions
comprise an outer rib extending between the leading end and the
trailing end of each control element
28. An aquatic device according to claim 27 wherein the protrusions
further comprise an inner rib extending between the leading end and
the trailing end of each control element
29. An aquatic device according to claim 27 wherein the outer rib
is located at an outer side edge of the control element.
30. An aquatic device according to claim 29 wherein the outer rib
is configured to taper inwardly in the forward direction and merge
with the leading end of the control element.
31. An aquatic device according to claim 27 wherein the inner rib
is located adjacent an inner side edge of the control element.
32. An aquatic device comprising handle means adapted to be grasped
by a user to apply propulsion thereto, and two control elements
moveable one with respect to the other for maneuvering the aquatic
device while being propelled by the user, the handle means being
operably connected to the two control elements whereby the user can
manually control movement of the control elements one with respect
to the other.
33. A swimming aid comprising handle means adapted to be grasped by
a user, and two control elements moveable one with respect to the
other to manoeuvre the swimming aid, the handle means being
operably connected to the two control elements whereby the user can
manually control movement of the control elements one with respect
to the other.
34. An aquatic device comprising handle means adapted to be grasped
by a user, and two control elements moveable one with respect to
the other to manoeuvre the aquatic device; wherein the control
elements comprise water guiding members.
35. A swimming aid comprising handle means adapted to be grasped by
a user, and two control elements moveable one with respect to the
other to manoeuvre the aquatic device; wherein the control elements
comprise water guiding members.
Description
[0001] This application is a Continuation of U.S. Ser. No.
12/144,393, filed 23 Jun. 2008, which is a Continuation-in-Part of
PCT/AU2006/001862, filed 7 Dec. 2006, which claims benefit of
Serial No. 2005907264, filed 23 Dec. 2005 in Australia and which
applications are incorporated herein by reference. To the extent
appropriate, a claim of priority is made to each of the above
disclosed applications.
FIELD OF THE INVENTION
[0002] This invention relates to an aquatic device, and more
particularly to an aquatic device for providing maneuverability to
a user moving in water.
BACKGROUND OF THE INVENTION
[0003] There have been various proposals for maneuvering a person
through a body of water. The proposals typically involve devices
for propelling a user through a body of water in a manner which
allows the user to travel either along the water surface or under
water. Such devices have recreational applications and are also
particularly suitable for underwater pursuits such as diving and
snorkeling.
[0004] One known type of such device is disclosed in U.S. Pat. No.
5,558,551 which involves a planar member adapted to be towed behind
a boat by way of a tow line to which the planar member is attached.
The planar member incorporates handle apertures by means of which a
user can grasp the planar member to be towed along. The planar
member can be articulated by the user to provide some limited depth
and steering control within the water while being towed behind the
boat.
[0005] While articulation of the planar member does provide some
steering and depth control, there can be a significant lag between
articulation of the planar member and a resultant directional
change in the movement of the user. Accordingly, there can be a
lack of responsiveness and subtle changes in direction can be
difficult to achieve. Further, it may be necessary for the user to
rotate his or her body in order to achieve articulation of the
planar member for directional control.
[0006] An aquatic device which is propelled by a user (rather than
being towed) is a swimming kick board commonly used to improve the
kicking action of swimmers. Such an aquatic device offers limited
direction control through tilting of the board and is generally not
suitable for use underwater.
[0007] It is against this background that the present invention has
been developed.
[0008] The above discussion of the background to the invention is
intended to facilitate an understanding of the present invention.
However, it should be appreciated that the discussion is not an
acknowledgement or admission that any of the material referred to
was published, known or part of the common general knowledge in
Australia as at the priority date of the application.
SUMMARY OF THE INVENTION
[0009] According to a first aspect of the invention there is
provided an aquatic device comprising handle means adapted to be
grasped by a user, and two control elements moveable one with
respect to the other to manoeuvre the aquatic device.
[0010] The aquatic device may be maneuvered through movement of the
control devices to provide directional control or variation to the
orientation of the device (and hence to the user holding the
device). The directional control may include both steering and
depth control (including at least dissension and ascension).
[0011] Preferably, the control elements comprise fins.
[0012] Each control element may comprise a leading end, a trailing
end, and upper and lower control surfaces therebetween. The upper
and lower control surfaces may taper inwardly with respect to each
other in the direction towards the trailing end. The leading end
may be profiled to facilitate movement through the water. The
leading end may, for example, present a rounded profile or
alternatively be of angular configuration incorporating a leading
edge.
[0013] Each control element may be configured to guide water flow
along the control surfaces. Specifically, each control element may
comprise protrusions extending from either or both of the upper and
lower control surfaces. The protrusions may comprise an inner rib
extending between the leading end and the trailing end of each
control element. The protrusions may further comprise an outer rib
extending between the leading end and the trailing end of each
control element.
[0014] The outer rib is preferably located at an outer side edge of
the control element. The ribs outer rib may be arcuate in
cross-sectional profile. Further, the outer rib may be configured
to taper inwardly in the forward direction and merge with the
leading end of the control element.
[0015] The inner and outer ribs provide flow control elements for
guiding oncoming water with respect to the upper and lower control
surfaces, impeding spillage of water sidewardly prior to reaching
the trailing end. Further, the protrusions which provide the outer
ribs may function as a safety edge along the at the outer side
edges of the control elements
[0016] Preferably, the handle means are operably connected to the
two fins whereby the user can manually control movement of the
control elements one with respect to the other.
[0017] Preferably, the control elements are pivotally moveable with
respect to each other.
[0018] Preferably, the control elements are movable about a common
pivot axis.
[0019] Preferably, the common axis is generally transverse to the
direction of travel.
[0020] Preferably, the pivot axis is generally horizontal when the
aquatic device is travelling in a generally horizontal straight
line direction.
[0021] Preferably, the handle means comprises two handles each
connected to a respective one of the control elements.
[0022] In one arrangement, the two control elements may be disposed
adjacent each other and the two handles located laterally outwardly
thereof. In other arrangement, the two handles may be disposed
adjacent each other and the two control elements located laterally
outwardly thereof.
[0023] Preferably, the relative positions of the handles with
respect to the control elements are selectively variable. In other
words, the configuration of the aquatic device can be changed
between the arrangement in which the two control elements are
disposed adjacent each other and the two handles located laterally
outwardly thereof, and the arrangement in which the two handles are
disposed adjacent each other and the two control elements located
laterally outwardly thereof.
[0024] Preferably, the aquatic device further comprises an axle
wherein the control elements and the respective handles connected
thereto are rotatably supported on the axle. In one arrangement,
the axle may provide a spindle upon which the control elements and
the respective handles pivot. In another arrangement, the axle may
provide a spindle pivotally interconnecting the control elements
and the respective handles
[0025] The control elements and the handles may be removable from
the axle. This may allow for disassembly for ease of transport and
storage. Further is may facilitate the selective variation of the
relative positions of the handles with respect to the control
elements.
[0026] The aquatic device according to the invention may be
propelled through the water in any appropriate way. In one
arrangement, the aquatic device may be adapted to be towed through
the water. In another arrangement, the aquatic device may be
propelled through the water by the user. In still another
arrangement, the aquatic device may have an on-board propulsion
system.
[0027] Where the aquatic device is adapted to be towed through the
water by way of a tow line, the device preferably has a connection
means for attachment to the tow line. The connection means
preferably provides for detachable connection to the tow line.
[0028] Preferably, the connection means is associated with the
axle. In one arrangement, the connection means may comprise a
bridle having sections extending from each end of the axle. In
another arrangement, the connection means may comprise a coupling
on the axle, preferably centrally located such there is a
respective control element and handle to each side thereof. The
aquatic device may be fitted with both connection arrangements in
order to provide the user with a choice.
[0029] According to a further aspect of the invention there is
provided an aquatic device for towing a user through a body of
water, the aquatic device comprising handle means adapted to be
grasped by the user, and two control elements moveable one with
respect to the other for directional control of the device.
[0030] According to a still further aspect of the invention there
is provided an aquatic device comprising handle means adapted to be
grasped by a user to apply propulsion thereto, and two control
elements moveable one with respect to the other for maneuvering the
aquatic device while being propelled by the user, the handle means
being operably connected to the two control elements whereby the
user can manually control movement of the control elements one with
respect to the other.
[0031] According to a still further aspect of the invention there
is provided a swimming aid comprising handle means adapted to be
grasped by a user, and two control elements moveable one with
respect to the other to manoeuvre the swimming aid, the handle
means being operably connected to the two control elements whereby
the user can manually control movement of the control elements one
with respect to the other.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The invention will be better understood by reference to the
following description of several specific embodiments thereof as
shown in the accompanying drawings in which:
[0033] FIG. 1 is a schematic perspective view of an aquatic device
according to a first embodiment in use;
[0034] FIG. 2 is a further schematic perspective view of the
aquatic device in use;
[0035] FIG. 3 is a schematic perspective view of the aquatic device
in a disassembled condition;
[0036] FIG. 4 is a schematic perspective view of the aquatic device
assembled in a first configuration and having a bridle connection
to a tow line;
[0037] FIG. 5 is a schematic perspective view of the aquatic device
assembled in a second configuration and having the bridle
connection to the tow line;
[0038] FIG. 6 is a schematic perspective view of the aquatic device
in the configuration of FIG. 5 but having a central connection to
the tow line;
[0039] FIG. 7 is a schematic perspective view illustrating the
aquatic device in use towing a user, with the aquatic device being
in a condition to descend;
[0040] FIG. 8 is a schematic perspective view illustrating the
aquatic device in use towing a user, with the aquatic device being
in a condition to ascend;
[0041] FIG. 9 is a schematic perspective view illustrating the
aquatic device in use towing a user, with the aquatic device being
in a condition to rotate anti-clockwise or alternatively perform a
left turn;
[0042] FIG. 10 is a view similar to FIG. 9, with exception that the
aquatic device is in a condition to rotate clockwise or
alternatively perform a right turn;
[0043] FIG. 11 is a front view showing rotation of the aquatic
device when in the condition shown in FIG. 9;
[0044] FIG. 12 is a front view showing rotation of the aquatic
device when in the condition shown in FIG. 10;
[0045] FIG. 13 is a schematic perspective view of an aquatic device
according to a second embodiment in use;
[0046] FIG. 14 is a view similar to FIG. 13 except that the aquatic
device is shown in a condition to descend;
[0047] FIG. 15 is a further schematic perspective view of the
aquatic device according to the second embodiment in use;
[0048] FIG. 16 is a schematic perspective view of an aquatic device
according to a third embodiment;
[0049] FIG. 17 is a perspective view of an aquatic device according
to a fourth embodiment;
[0050] FIG. 18 is a side view of the aquatic device according to
the fourth embodiment;
[0051] FIG. 19 is front view of the aquatic device according to
according to the fourth embodiment;
[0052] FIG. 20 is perspective of the aquatic device according to
according to the fourth embodiment, with one of the fins
rotated;
[0053] FIG. 21 is a perspective view of the aquatic device
according to the fourth embodiment;
[0054] FIG. 22 is a perspective view of the aquatic device
according to the fourth embodiment in use;
[0055] FIG. 23 is a cross-sectional view of the aquatic device
according to the fourth embodiment;
[0056] FIG. 24 is a perspective view of a portion of the aquatic
device according to the fourth embodiment providing one of the
handles;
[0057] FIG. 25 is a cross-sectional view of the central coupling
portion of the aquatic device according to the fourth
embodiment;
[0058] FIG. 26 is an exploded view of the central coupling
portion;
[0059] FIG. 27 is a perspective view of an element forming part of
the central coupling portion;
[0060] FIG. 28 is a side view of the element of FIG. 27;
[0061] FIG. 29 is an end view of the element of FIG. 27 FIG. 30 is
a perspective view of the aquatic device according to a fifth
embodiment;
[0062] FIG. 31 is a perspective view from the front of a fin of the
aquatic device according to the fifth embodiment;
[0063] FIG. 32 is a perspective view from the rear of the fin of
FIG. 31; and
[0064] FIG. 33 is a plan view of the fin of FIG. 31.
BEST MODE(S) FOR CARRYING OUT THE INVENTION
[0065] Referring to FIGS. 1 to 12 of the drawings, there is shown
an aquatic device 10 according to the first embodiment for towing a
user 11 through a body of water 13. The aquatic device 10 is
adapted to be towed behind a boat 15 by way of a tow line 17, and
the user 11 may travel on or under the water.
[0066] The aquatic device 10 comprises handle means 20 adapted to
be grasped by the user 11 with arms extending forwardly, and two
fins 21, 22 pivotally moveable with respect to each other.
[0067] The aquatic device 10 further comprises an axle 23 onto
which the handle means 20 and the fins 21, 22 are pivotally
mounted. In the arrangement shown the axle 23 is tubular,
comprising a rigid tube of any appropriate material such as
aluminium.
[0068] The handle means 20 comprises two handles 24 each connected
to a respective one of the fins 21, 22. With this arrangement, the
combination of each handle 24 and its respective fin 21, 22
comprises a control unit 25. The control units are rotatably
mounted on the axle 23.
[0069] Each handle 24 comprises a tubular shaft 26 and a hand grip
27 provided on the outer side of the shaft. The tubular shaft 26 is
rotatably mounted on the axle 23. The hand grip 27 is configured to
offer a comfortable grip for the user.
[0070] Each fin 21, 22 comprises a fin body 28 having an upper
control surface 29, a lower control surface 30, a leading end 31
and trailing end 32. The upper and lower control surfaces 29, 30
taper towards each other in the direction towards the trailing end
32. The fin body 28 is of hollow construction with an open interior
34 for ingress of water to reduce buoyancy effects. In the
arrangement shown, the leading end 31 is configured to present a
rounded profile to oncoming water as the aquatic device 10 is
propelled through the water.
[0071] Each fin 21, 22 incorporates a sleeve portion 35 having a
hole 36 which extends crosswise through the body 28 adjacent the
leading end 31 and which is co-axial with the tubular shaft 26.
With this arrangement, the fins 21, 22 can be rotatably mounted on
the axle 23 by virtue of the axle being received within the hole
36.
[0072] The tubular shaft 26 of each handle 24 is connected to the
respective fin 21, 22 such that rotation of the handle 24 causes
rotation of the respective fin.
[0073] The control units 25 can be positioned on the axle 23
selectively in either one of two arrangements. In the first
arrangement, which is best seen in FIG. 4, the control units 25 are
oriented such that the two fins 21, 22 are disposed adjacent each
other and the two handles 24 are located laterally outwardly
thereof adjacent the ends of the axle 23. In the second
arrangement, which is best seen in FIG. 5, the control units 25 are
oriented such that the two handles 24 are disposed adjacent each
other and the two fins 21, 22 located laterally outwardly thereof
adjacent the ends of the axle 23. The first arrangement is
particularly suitable for larger children and adults who may have a
preference for a wider grip on the aquatic device 10 as it is
likely to be more comfortable. The second arrangement is
particularly suitable for small children whose grip might not be
able to span the distance between the handles 24 when they are not
disposed adjacent each other.
[0074] A spacer 37 is provided on the axle 23 between the two
control units 25. End fittings 41 are provided on the axles 23 in
order to retain the control units 25 in position thereon. The end
fittings 41 are removable to facilitate disassembly of the aquatic
device 10 or to alter the configuration of the control units 25 on
the axles 23. Spacers 42 are provided between each end fitting 41
and the adjacent control unit 25.
[0075] A bridle 43 is provided on the axle 23 for attachment to the
tow line 17. The bridle 43 has two bridle sections 45 which extend
from the ends of the axle 23 to a common coupling 47 releasably
attachable to the tow line 17. In the arrangement shown, the bridle
43 comprises a loop 49 in the form of a length of rope or cable
extending through the tubular axle 23 and connected at its ends to
the common coupling 47. The loop 49 may be constrained in any
appropriate way to prevent it from sliding within the axle 23.
[0076] The central spacer 37 may incorporate a coupling 51
providing an attachment point to which the tow line 17 can be
connected, if desired, in order to offer an alternative connection
to the tow line 17 to that provided by the bridle 43. Such an
arrangement is illustrated in FIG. 6. If the coupling 51 is used to
provide the connection to the tow line 37, the bridle 43 can be
removed from the axle 23.
[0077] Operation of the aquatic device 10 according to the first
embodiment will now be described. The aquatic device 10 is coupled
to the tow line 17 in the manner described so that it can be towed
behind the boat 15 with the user 11 holding the handles 24 at the
hand grips 27 with arms extending forwardly. In this way, the user
11 can be towed behind the aquatic device 10 as it is pulled
through the water 13 by the boat 15.
[0078] The user 11 is able to manoeuvre the aquatic device 10 by
turning the handles 24 to move the fins 21, 22. If the user wishes
to travel in a straight-line direction, the two fins 21, 22 are
positioned in alignment with each other and also in general
alignment with the direction of travel, as illustrated in FIG. 1.
Where the user 11 wishes to descend (for example to perform a
dive), the user 11 merely rotates both fins 21, 22 upwardly, as
shown in FIG. 7. Similarly, where the user 11 wishes to ascend, he
or she merely rotates both fins 21, 22 downwardly as illustrated in
FIG. 8.
[0079] The user 11 may in certain circumstance vary his or her
orientation, and in other circumstances possibly achieve some
steering control, by rotating one fin 21, 22 relative to the other,
as illustrated in FIGS. 9 and 10. In FIG. 9, the right fin 22 is
shown rotated downwardly and the left fin 21 is shown rotated
upwardly, thereby causing the aquatic device 10 to either rotate in
an anti-clockwise direction (with respect to the direction of
travel) as indicated by arrow 61 or alternatively perform a left
turn (with respect to the direction of travel) as indicated by
arrow 62. In FIG. 10, the left fin 21 is shown rotated downwardly
and the right fin 22 is shown rotated upwardly, thereby causing the
aquatic device 10 to either rotate in a clockwise direction (with
respect to the direction of travel) as indicated by arrow 63 or
alternatively perform a right turn (with respect to the direction
of travel) as indicated by arrow 64. FIG. 11 illustrates
schematically rotation of the aquatic device 10 and the user 11
when the fins 21, 22 are in the condition shown in FIG. 9.
Similarly, FIG. 12 illustrates schematically rotation of the
aquatic device 10 and the user 11 when the fins 21, 22 are in the
condition shown in FIG. 10.
[0080] Whether the aquatic device rotates or performs a turn (or
indeed perhaps maneuvers in a manner involving both rotation and a
turn) may depend on various factors including the depth at which
the device is operating and the speed at which it is being
towed.
[0081] There may be provision for tethering the aquatic device 10
to the user 11 to allow the user to temporarily release the handles
24 without losing access to the aquatic device. This may be
particularly suitable in circumstances where the user has a need to
use his or her hands for other purposes, such as for collecting
materials or inspecting underwater objects. Such tethering can be
achieved in any suitable way, such a with as flexible tether line
connected between the user and the aquatic device. With such an
arrangement, the user could release the aquatic device 10 to free
his or her hands for other purposes and could subsequently retrieve
the aquatic device by hauling in the tether line.
[0082] The aquatic device 10 may also have provision for fitting
various accessory devices, such as an underwater lighting system
and holders for equipment (such as tools and other devices). Lights
could, for example, be fitted onto the fins 21, 22.
[0083] In the first embodiment, the aquatic device 10 is configured
to be propelled by being towed through the water. Referring now to
FIGS. 13 to 15, there is shown an aquatic device 10 according to a
second embodiment which is adapted to be propelled by the user 11.
The aquatic device 10 according to the second embodiment can merely
be the aquatic device 10 according to the first embodiment but
configured differently. The ability to configure the aquatic device
10 in such different ways is particularly advantageous as it
provides various options regarding the manner in which the aquatic
device can be used. In the arrangement shown, the different
configuration involves removal of the bridle 43, as there is no
need for a connection to a tow line
[0084] In this second embodiment, the aquatic device 10 is
propelled by the user 11. In the arrangement shown, the user 11 is
wearing flippers 12 to generate propulsion in the water. The user
11 in effect pushes the aquatic device 10 through the water, using
it for maneuvering purposes. The user 11 is able to achieve depth
and steering control by operating the aquatic device to manipulate
the fins 21, 22 in a manner similar to that described in relation
to the first embodiment. Because the aquatic device 10 is not being
towed, it is likely that the user would be able to turn through a
full circle should that be desired. When using the aquatic device
according to this embodiment, the user may find it necessary to
wear a weight-belt in order to overcome buoyancy effects.
[0085] Referring now to FIG. 16, there is shown an aquatic device
according to a third embodiment. This third embodiment is similar
in many respects to the second embodiment and so like reference
numerals are used to denote corresponding parts. In this
embodiment, the fins 21, 22 are of a closed construction to exclude
the ingress of water. With this construction, the fins 21, 22 can
be either buoyant or non-buoyant, according to the material or
materials from which they are constructed. Further, the leading end
31 is configured to present a leading edge 31a to the oncoming
water as the aquatic device is moved through the water.
[0086] Referring to FIGS. 17 to 29 of the drawings, there is shown
an aquatic device 140 according to a fourth embodiment. In the
arrangement shown, the aquatic device 140 is intended to be
propelled by a user 190, as shown in FIG. 22. However, it should be
understood that the aquatic device 140 could be adapted to be towed
in the manner of the first embodiment.
[0087] The aquatic device 140 comprises handle means 141 adapted to
be grasped by the user 190 with arms extending forwardly, and two
control elements such as fins 144, 145 pivotally moveable with
respect to each other.
[0088] The handle means 141 comprises two handles 142
interconnected by a rotatable coupling 143.
[0089] The coupling 143 provides an axle 146 onto which the handles
142 are pivotally mounted.
[0090] Each fin 144, 145 comprises a fin body 152 having an upper
control surface 156, a lower control surface 160, a leading end
164, a trailing end 168, an outer side edge 165 and an inner side
edge 167. The upper and lower control surfaces 156 and 158 taper
towards each other in the direction towards the trailing end 168.
In the arrangement shown, the leading ends 164 are hydrodynamically
configured to present an edge profile to oncoming water as the
aquatic device 140 is propelled through the water. The edge profile
at the leading ends 164 is rounded in the embodiment.
[0091] Referring to FIG. 23, each fin 144, 145 incorporates a
sleeve portion 172 located at its leading inner corner for mounting
of the fins 144,155 onto the handle means 141 via a male portion
174 located at an end of each handle 142. The fins 144, 145 are
releasably attached to the handle means 141 so they can be removed
to facilitate disassembly of the aquatic device 140 or to alter the
configuration of the aquatic device by locating different type of
fins 144,145.
[0092] With this arrangement, the combination of each handle 142
and its respective fin 144, 145 comprises a control unit 180. As
shown in FIG. 24, each handle 142 comprises a hand grip 182 which
is configured to offer a comfortable grip for the user.
[0093] Fins 144 and 145 are configured with rounded corners 184 and
rounded leading ends 160 and trailing ends 164 (see FIG. 18) to
provide safety edges that are not sharp and thus not likely to harm
the user 190 or persons close to the user while the aquatic device
is being used.
[0094] As shown in FIGS. 17 to 20, the fins 144, 145 are configured
to guide water along the control surfaces 156, 160. Specifically,
each fin 144, 145 comprises protrusions 186, 188 that protrude from
the upper and lower control surfaces 156, 160. Protrusions 186 each
comprise an inner rib 187 extending from adjacent the sleeve
portion 172 to the trailing end 168, inwardly of the inner side
edge 167. Protrusions 188 each comprise an outer rib 189 at the
outer side edge 165, extending from the leading end 164 to the
trailing end 168. The ribs 189 are arcuate in cross-sectional
profile, as shown in FIG. 19. Further, the ribs 189 are configured
to taper inwardly in the forward direction and merge with the
leading end 160 of the fin, as best seen in FIGS. 20 and 23.
[0095] The ribs 187, 189 provide flow control elements for guiding
oncoming water over the upper and lower control surfaces 156, 160
of the fins 144,145, impeding spillage of water sidewardly prior to
reaching the trailing end 168 of the fins.
[0096] All edges of protrusions 186 and 188 are rounded to avoid
injury of the user or persons close to the user while the aquatic
device is being used. Further, the protrusions 188 which provide
the outer ribs 189 function as a safety edge along the at the outer
side edges 165 of the fins.
[0097] The control units 180 are rotatably mounted on the axle 146
and for this purpose the opposite end of the handle means 141
comprises a sleeve portion 176 (see FIG. 24) for mounting the
handle means 141 rotatably onto the axle 146 via male portions 206
located at each end of axle 146 (see FIG. 26).
[0098] FIGS. 25 to 29 show the axle 146 and the elements that
comprise it. In the arrangement shown, the axle 146 is tubular and
comprises a centre element 194 having an irregular outer surface
148 and two ends 150 onto which the handle means 141 are
attached.
[0099] The rotatable coupling 143 which provides the axle 146
comprises two inner coupling portions 202 interconnected for
rotational one relative to the other by a hinge pin 198. An outer
coupling sleeve surrounds the two coupling portions and serves to
retain the assembly together.
[0100] Each inner coupling portion 202 comprises a shank section
204 at one end, a spigot section 206 at the other end, and an
intermediate section 207 comprising a boss and incorporates a
gripping formation 216. The shank section 204 incorporates a bore
205 into which the hinge pin 198 is rotatably received.
[0101] The coupling sleeve 196 is of resilient construction to
permit relative rotational movement (albeit to a limited extent)
between the handles 142. In the illustrated arrangement, the
coupling sleeve is formed of a resiliently flexible plastics
material and has lateral ribbing on the outer surface thereof to
enhance its flexibility.
[0102] The ends of the coupling sleeve 196 are received on the
bosses 214 of the inner coupling portions 202 and clampingly
retained thereon by clamping rings 218.
[0103] With this arrangement, the coupling sleeve 196 retain the
assembly of the two inner coupling portions 202 together with the
hinge pin 198 extending therebetween, while allowing limited
pivotal movement of one inner coupling portion 202 relative to the
other (thereby accommodating relative rotational movement between
the two handles 142 and the fins connected thereto). Further the
outer coupling sleeve 196 seals the assembly against the ingress of
water and foreign matter such as sand and grit.
[0104] Each handle 142 comprises a body 171 having a central
portion 173 defining the hand grip 182. The handle body 171 has an
outer end configured as a spigot 174 for connection to the sleeve
portion 172 of the respective fin, and an inner end configured as a
socket 176 to receive the spigot section 206 of one of the inner
coupling portions 202. A locking mechanism 208 is provided for
retaining the spigot section 206 in the socket 176
[0105] In this fourth embodiment, the aquatic device 141 is
propelled by the user 190 (see FIG. 22) thus acting as a swimming
aid. In the arrangement shown, the user 190 is wearing flippers 192
to generate propulsion in the water. The user 190 in effect pushes
the aquatic device 190 through the water, using it for maneuvering
purposes. The user 190 is able to achieve depth and steering
control by operating the aquatic device to manipulate the fins 144,
145 in a manner similar to that described in relation to the first
embodiment. If the aquatic device 190 is not being towed, it is
likely that the user would be able to turn through a full circle
should that be desired.
[0106] Referring now to FIGS. 31 to 33, there is shown an aquatic
device according to a fifth embodiment. The aquatic device
according to this fifth embodiment is similar in many respects to
the fourth embodiment and so corresponding reference numerals are
used to identify corresponding parts. In this fifth embodiment,
each rib 189 is configured to extend along the outer side edge 165
and at least partly along the leading end 160 of the fin body 152
to ultimately merge therewith. Each rib 189 is configured to ensure
that the hydrodynamics of the respective fin are not
compromised.
[0107] From the foregoing, it is evident that the present
embodiments each provide a simple yet highly effect aquatic device
which can be easily operated by a user in order to provide
maneuverability through the water.
[0108] It should be appreciated that the scope of the invention is
not limited to the scope of the embodiments described. For example,
in the first embodiment described, the aquatic device 10 is adapted
to be towed behind a boat. Other towing arrangements may, of
course, be utilised; for example, an overhead cable towing system,
a land-based towing system or simply some other person manually
pulling the aquatic device along.
[0109] Further, in an alternative arrangement, the aquatic device
may incorporate an on-board propulsion system.
[0110] Throughout the specification, unless the context requires
otherwise, the word "comprise" or variations such as "comprises" or
"comprising", will be understood to imply the inclusion of a stated
integer or group of integers but not the exclusion of any other
integer or group of integers.
* * * * *