U.S. patent number 3,835,494 [Application Number 05/423,429] was granted by the patent office on 1974-09-17 for water walking pontoons.
Invention is credited to Earle T. Dougherty.
United States Patent |
3,835,494 |
Dougherty |
September 17, 1974 |
WATER WALKING PONTOONS
Abstract
A water walking apparatus including a pair of elongated pontoons
by which a user is able to propel himself through the water with a
walking motion. The pontoons have longitudinally extending tunnels
with flippers therein and have ballast tanks with buoyancy
adjusting valves. The pontoons are formed with pitch dampeners
thereon for improved stability and may also be provided with
inertia reducers and improved propelling fins or flippers to
increase the speed and distance travelled with the expenditure of a
given amount of energy.
Inventors: |
Dougherty; Earle T. (Phoenix,
AZ) |
Family
ID: |
23678882 |
Appl.
No.: |
05/423,429 |
Filed: |
December 10, 1973 |
Current U.S.
Class: |
441/77; D21/422;
472/129 |
Current CPC
Class: |
B63B
34/56 (20200201) |
Current International
Class: |
B63B
35/83 (20060101); B63B 35/73 (20060101); A63c
015/04 () |
Field of
Search: |
;9/31D,31R,31A,31B,31C,31E ;115/21,25 ;114/125,61,66.5F |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Blix; Trygve M.
Assistant Examiner: Basinger; Sherman D.
Attorney, Agent or Firm: Haynes, Jr.; Herbert E.
Claims
What I claim is:
1. A pair of water walking pontoons each of said pontoons
comprising:
a. an elongated body of rigid buoyant construction;
b. a tunnel formed longitudinally of said body adjacent the bottom
thereof, said tunnel laterally off-set toward one side of said body
and forming a water admitting opening proximate the bow of said
body and a water expelling opening proximate the stern thereof;
c. flipper means mounted within said tunnel for permitting water
flow therethrough from the bow to the stern of said body and to
prevent water flow in the reverse direction; and
d. a boot formed in said body and positioned substantially
intermediate the bow and stern thereof, said boot laterally offset
toward the side of said body which is opposite from the side toward
which said tunnel is laterally offset, said boot extending from the
bottom of said body upwardly therethrough to the deck thereof.
2. A pair of water walking pontoons as claimed in claim 1 wherein
said flipper means comprises a plurality of individual flippers
each hingedly mounted within said tunnel for movement from a closed
depending position to an open substantially horizontal position,
said flippers positioned so that when closed they will partially
overlap each other to seal said tunnel.
3. A pair of water walking pontoons as claimed in claim 1 wherein a
ballast tank extends upwardly through said body from said tunnel
and is separated from said tunnel by the roof thereof, said ballast
tank having valve means therein by which water may be selectively
admitted from said tunnel to said ballast tank.
4. A pair of water walking pontoons as claimed in claim 1 wherein
said body includes pitch dampening means formed on the bow and the
stern for preventing the bow and the stern from dipping below the
surface of the water.
5. A pair of water walking pontoons as claimed in claim 1 further
including:
a. a fin hingedly mounted on each of the opposite sides of said
body for movement between an extended position away from said body
and a retracted position flush therewith; and
b. means mounted on said body and connected to each of said fins
for manually moving said fins between the extended position and the
retracted position.
6. A pair of water walking pontoons as claimed in claim 1 and
further comprising:
a. at least one flipper assembly mounted on at least one of the
surfaces of said body, said flipper assembly pivotably movable
between an extended position substantially normal to said body and
a retracted position substantially flush therewith; and
b. means mounted on said body and connected to said flipper
assembly for pivotably moving said flipper assembly between the
extended and the retracted positions thereof.
7. A pair of water walking pontoons as claimed in claim 6 wherein
said flipper assembly comprises:
a. a frame having an opening therethrough which is defined by at
least a pair of opposed vertical side members; and
b. at least one flipper pivotably mounted between the opposed side
members of said frame for pivotable movement about a substantially
horizontal axis, said flipper freely pivotable from an open
position which allows water to pass through the opening in said
frame in one direction and a closed position which prevents the
passage of water through the opening of said frame in the opposite
direction.
8. A pair of water walking pontoons as claimed in claim 1 further
comprising:
a. a plurality of flipper assemblies mounted on the one side
surface of said body toward which said tunnel is laterally offset,
said plurality of flipper assemblies pivotably movable between an
extended position substantially normal to said body and a retracted
position substantially flush therewith;
b. means interconnecting said plurality of flipper assemblies so
that the pivotable movement thereof is in unison; and
c. means mounted on said body and connected to said means for
interconnecting said plurality of flipper assemblies by which a
user may move said plurality of flipper assemblies.
9. A pair of water walking pontoons as claimed in claim 1 further
comprising:
a. a plurality of flipper assemblies mounted on the bottom of said
body and pivotably movable between a depending extended position
and a retracted position substantially flush therewith;
b. means interconnecting said plurality of flipper assemblies so
that the pivotable movement thereof is in unison; and
c. means mounted on said body and connected to said means for
interconnecting said plurality of flipper assemblies by which a
user may move said plurality of flipper assemblies.
10. A water walking apparatus comprising:
a. a pair of elongated pontoons juxtapositionally operable with
respect to each other, each of said pontoons having a body of rigid
buoyant construction;
b. a tunnel formed in each of said pontoons and extending
longitudinally thereof, said tunnels positioned adjacent the
bottoms of their respective ones of said pontoons and laterally
offset toward the outwardly disposed side surfaces thereof, each of
said tunnels having a water admitting opening formed therein
proximate the bow of their respective ones of said pontoons and
having a water exiting opening formed proximate the sterns
thereof;
c. flipper means mounted within each of said tunnels for permitting
water to flow therethrough in the direction from the bow to the
stern and preventing water from flowing in the reverse direction;
and
d. a boot member formed in each of said pontoons and positioned
substantially intermediate the bow and the stern of their
respective ones of said pontoons, each of said boots laterally
offset toward the inwardly disposed side surface of its respective
one of said pontoons and extending from the bottom upwardly through
the body to the deck thereof.
11. A water walking apparatus as claimed in claim 10 wherein each
of said pontoons is formed with pitch dampening means on the bow
and stern thereof, said pitch dampening means including a
cantilever deck having the bottom surface positioned immediately
above the intended water line of said pontoons.
12. A water walking apparatus as claimed in claim 10 wherein said
pair of pontoons are interconnected with inertia reducing means for
biasingly urging said pontoons into a side-by-side
relationship.
13. A water walking apparatus as claimed in claim 10 wherein said
pair of pontoons are interconnected at their respective bows and
sterns with elastic cords for aiding the user to overcome inertia
when using said pontoons.
14. A water walking apparatus as claimed in claim 10 wherein said
pair of pontoons are interconnected at their respective bows,
sterns and midship portions with elastic cords for aiding the user
in overcoming inertia.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention pertains to water walking devices and more
particularly to a pair of water walking pontoons having improved
stability and propulsion characteristics.
2. Description of the Prior Art
Many attempts have been made to devise a practical apparatus which
would enable a user to propel himself through the water in a
standing position and by employing a walking movement. Although the
prior art devices have taken many forms, they have generally proven
unsatisfactory due to various problems which are believed to have
kept these prior art devices from becoming commercially
acceptable.
One such problem is control, i.e., as the user propels himself
through the water with a walking motion, there is a natural
tendency for the individual floats or shoes to drift apart. Another
problem is stability in that generally the prior art floats had
very little displacement thus requiring a keen sense of balance on
the part of the user. Still another problem is buoyance in that no
provisions were made to accommodate users of different sizes. Yet
another problem was the straddle-legged position that the user must
assume due to the width of the individual floats. This
straddle-legged position resulted in problems of control and
fatigue. Also, efficient propulsion means has proven difficult to
achieve.
In attempts to solve the above problems, the prior art structures
have been bulky, complex, costly, hard to fabricate and have
resulted in other such manufacturing and marketing problems.
A particular prior art device which solved some of these problems
and eased many of the others is disclosed in U.S. Pat. No.
3,758,898, issued on Sept. 18, 1973, to the same inventor. However,
it was found after extensive use and testing that better stability
and control would be desirable. It was also found that the
propulsion means could be improved as the speed and distance
travelled for the expenditure of a given amount of energy was not
completely satisfactory.
Therefore, in view of the foregoing, a need exists for a new and
useful water walking apparatus which improves the performance of
the prior art devices and solves some of the problems thereof.
SUMMARY OF THE INVENTION
In accordance with the present invention, a new and improved water
walking apparatus is disclosed as including a pair of elongated
pontoons of substantially rectangular cross sectional configuration
with the height dimension being larger than the width. The pontoons
are guided and held in a vertical position by the user's lower leg
portions which are encased in boots provided adjacent to the
inwardly disposed cofacing surfaces of the justaposed pontoons.
Each of the pontoons is fabricated of buoyant material and has a
longitudinally extending tunnel formed adjacent to the bottom
thereof through which water is allowed to move when the pontoons
are in use. The tunnels each have a hinged flapper device therein
for improving the response of the pontoons and for propulsion
purposes and each have an upstanding ballast tank formed therein by
which the buoyancy of the pontoons may be adjusted.
Pitch dampening structures are formed on the bow and stern of each
of the pontoons and inertia reducing means preferably in the form
of elastic cables, interconnect the bows and sterns of the
respective pontoons to ease the effort required to perform a
walking motion and to help the user to control the tendency for
lateral drifting of the pontoons.
Improved propulsion mechanisms are mounted on the pontoons in the
form of manually operable fins and/or extendable flapper mechanisms
which improve the speed and distance travelled with the expenditure
of a given amount of energy.
Accordingly, it is an object of the present invention to provide a
new and improved water walking apparatus.
Another object of the present invention is to provide a new and
improved water walking apparatus having means thereon by which the
user may adjust the buoyancy and having pitch dampening means, both
for improving the stability of the apparatus.
Another object of the present invention is to provide a new and
improved water walking apparatus including a pair of elongated
pontoons each having a longitudinally extending tunnel formed
therein adjacent to the bottom thereof and in which flipper means
are mounted to improve the response and ease of propelling the
apparatus.
Another object of the present invention is to provide a new and
improved water walking apparatus having inertial reducing means to
ease the effort required of a user to accomplish the walking motion
and to enable him to more easily control lateral drifting.
Still another object of the present invention is to provide a new
and useful water walking apparatus of the above described character
having improved propulsion means in the form of manually operable
fins and/or extendible flapper mechanisms to increase the speed and
distance travelled with the expenditure of a given amount of
energy.
The foregoing and other objects of the present invention, as well
as the invention itself, may be more fully understood from the
following description when read in conjunction with the
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the water walking apparatus of the
present invention being operated by a user and incorporating some
of the various features of the present invention.
FIG. 2 is a plan view of one of the pontoons which forms part of
the water walking apparatus of the present invention.
FIG. 3 is an enlarged front view of one of the pontoons of the
present invention.
FIG. 4 is an enlarged sectional view taken on the line 4--4 of FIG.
2.
FIG. 5 is an enlarged sectional view taken on the line 5--5 of FIG.
2.
FIG. 6 is a fragmentary side view of one of the pontoons of the
present invention having one form of improved propulsion means
mounted thereon.
FIG. 7 is a sectional view taken on the line 7--7 of FIG. 6, and
illustrating the improved propulsion means shown in that
figure.
FIG. 8 is a fragmentary plan view of the mechanism shown in FIGS. 6
and 7.
FIG. 9 is a fragmentary plan view of a pair of pontoons of the
present invention having another form of the improved propulsion
means thereon.
FIG. 10 is an enlarged sectional view taken on the line 10--10 of
FIG. 9.
FIG. 11 is a fragmentary sectional view taken on the line 11--11 of
FIG. 10.
FIG. 12 is a fragmentary plan view of the mechanism shown in FIGS.
9, 10 and 11.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring more particularly to the drawings, FIG. 1 illustrates the
water walking apparatus of the present invention which is indicated
generally by the reference numeral 10, and is shown to include a
pair of pontoons 11 and 12 being worn on the lower leg portions 13
of a user 14.
The pontoons 11 and 12 are each formed into an elongated structure
of generally rectangular cross sectional configuration with the
height dimension being larger than the width dimension. This type
of structure has two advantages, the first being that the pontoons
may be positioned in a close juxtaposed relationship so as not to
require a user to assume an exaggerated straddle-legged position,
and the second advantage being that the largest surface area of the
pontoons will be the side surfaces or edges so that the pontoons
will resist the normal tendency to drift laterally, that is
separate when being used.
The pontoons 11 and 12 are of similar construction with one being
the mirror image of the other, thus the following detailed
description of the pontoons while being limited to the pontoon 12
will apply to the pontoon 11 as well.
The pontoon 12 is made up of two basic elements namely, a body 16
and a tunnel structure 18. The body 16 is molded or otherwise
formed of a buoyant material such as closed cell expanded
polystyrene as typified by a commercial product Styrofoam. An
alternate method of construction (not shown) would be to form a
suitable support frame and cover that frame with a suitable
waterproof material such as glass fiber impregnated with resin.
The tunnel structure 18 may be fabricated of any suitable material
and may act as a stiffening member for the pontoon structure. Any
of several well known fabrication techniques may be employed such
as sheet metal suitable welded or riveted, formed glass fiber
impregnated with resin, and the like.
In any event, the body 16 and the tunnel 18 are assembled, or
integrally formed, to provide the pontoon 12 with elongated side
surfaces 20 and 22 which are interconnected at their upper ends by
a deck 24, and are interconnected at their lower ends by a keel or
bottom 26. The deck 24 and bottom 26 extend longitudinally between
the bow 28 and the stern 30. As seen best in FIG. 2, the sides 20
and 22 are of longitudinally extending arcuate configuration to
form the pontoon into a streamline shape with a laterally bulging
midship portion which tapers fore and aft into a substantially
pointed bow 28 and stern 30. It should be understood however, that
the arcuate shapes of the sides 20 and 22 need not be symetrical,
for example, the side surface 20 may be formed with less of a curve
than is shown so that when in use, the pontoons 11 and 12 may be
positioned closer together so that the user may stand in a more
natural position as will hereinafter be described in detail.
At a central location substantially intermediate the bow 28 and the
stern 30, a boot member 32 is provided into which the user 14 may
insert his lower leg portion 13. It will be noted, particularly in
FIGS. 2 and 4, that the boot 32 is laterally offset to place it
adjacent to the side surface 20. Thus, with the two pontoons 11 and
12 having their respective boots 32 adjacent to their respective
side surfaces 20, and these side surfaces are in juxtaposed
cofacing relationship as seen in FIG. 1, the user will not be
required to assume an exaggerated straddle-legged position.
The boot 32 is formed with a substantially cylindrical upper
portion 34 for encasing the ankle and calf of the user's lower leg
portion 13, and a shoe portion 36 for encasing the user's foot. The
shoe 36 is located adjacent the bottom 26 of the pontoon 12, and
the upper portion 34 extends upwardly through the body 16 to the
deck 24. Due to this positioning of the boot 32, a relatively
stable device results due to the lower center of gravity. Also, by
the lower leg portion 13 of the user being encased in the boot 32,
lateral rocking of the pontoon is easily controlled by the user and
the pontoon will be easily kept in an upright position.
The effects on the user of pitching movements, i.e., rocking in a
plane laying through the longitudinal center line of the pontoon,
are held to a minimum by the ball of the user's foot being located
substantially intermediate the bow 28 and the stern 30 of the
pontoon 12.
The stability of the pontoons 11 and 12 is further insured by pitch
dampening means 38 formed on the bows 28 and sterns 30 of the
pontoons. As seen best in FIGS. 1, 2, and 3 the pitch dampening
means 38 includes a forwardly extending cantilever deck 40 formed
at the bow 28, and a rearwardly extending cantilever deck 42 formed
at the stern 30 of the pontoon 12. The cantilever decks 40 and 42
are flush with the deck 24 of the pontoon 12 and have a thickness
which places the bottoms 43 thereof just above the water line of
the pontoon. Thus, the forward cantilever deck 40 resists attempts
of the bow 28 to dip below the water's surface and the rear
cantilever deck 42 resists attempts of the stern 30 to dip below
the surface of the water.
With the user 14 standing in the pontoons 11 and 12, as shown in
FIG. 1, there is a tendency for the pontoons to roll inwardly due
to the weight of the user being applied at inwardly offset points
with regard to the longitudinal center lines of the pontoons. To
overcome this tendency and thus not rapidly fatigue the user, the
tunnel 18 is laterally offset toward the side surface 22 of the
pontoon 12. The weight of the water contained within the tunnels
18, when the pontoons 11 and 12 are in use, will resist lateral
rocking or rolling movements of the pontoons.
The tunnel 18 of pontoon 12 is formed with a water admitting
opening 46 proximate the bow 28 and a water expelling opening 47
proximate the stern 30. A flipper means 48 is provided in the
tunnel 18 which allows water to flow therethrough from the bow 28
to the stern 30 and will resist flow of the water in the reverse
direction. Thus, when in use, as the pontoon is moved in a forward
direction by a walking movement of the user, the flipper means 48
will open due to water pressure exerting a force on the front
surfaces thereof and water will flow through the tunnel 18. When an
attempt is made to move the pontoon in a reverse direction, again
by the walking movement of the user, the flipper means 48 will
close due to water pressure exerting a force on the rearwardly
disposed surfaces thereof and thus backward movement of the
pontoons is stopped.
As best seen in FIG. 5, the flipper means 48 includes a plurality
of individually hingedly mounted flippers 50 which are movable from
a closed depending position to an open substantially horizontal
position. The flippers 50 are positioned within the tunnel 18 so
that when closed, the flippers will partially overlap each other to
seal the tunnel. By employing a plurality of these flippers 50,
instead of a single hinge mounted flipper, the response time
consumed in changing from an open state to a closed state is
substantially reduced which minimizes back sliding movements which
naturally occur as the result of the user's walking movements.
As seen in FIG. 5, a ballast tank 52 extends upwardly from the
tunnel 18 and is separated therefrom by the upper wall or roof 53
of the tunnel. The tank 52 itself has a roof 54 which is flush with
the deck 24 of the pontoon 12. A user operated valve 56 is suitably
mounted in the roof 54 of the tank 52 and has a handle 57 mounted
atop a threaded shaft 58 which extends downwardly through a
mounting nut 59 and passes through the tank 52. The lower end of
the shaft has a poppet 60 formed thereon which is seated in seat
61. When the valve 56 is closed, that is, the poppet 60 is engaged
in the seat 61, the tank 52 will contain air and thus provide
buoyancy to the pontoon. The user may adjust the amount of buoyancy
by simply opening the valve 56 to admit water to the tank 52. The
tank 52 is provided with an aperture 62 formed in the roof 54 which
freely allows air to escape from the tank when water is admitted
thereto, and will allow air to reenter the tank when the water is
expelled.
If after water has been allowed to enter the tanks 52 of the
pontoons 11 and 12 to decrease the buoyancy, the user desires to
increase the buoyancy, or completely expel the water from the tanks
52, he may do so by opening the valves 56 (one at a time) and
simultaneously lifting the pontoon vertically with his leg. This
will allow the water to run out of the tank 52 and air will enter
through the aperture 62.
It has been found through use and testing that inertia plays a very
important part in contributing to the fatigue of the user of a
device of this nature. This may be easily seen when it is
considered that each time a forward movement of the pontoons is
started or stopped, as occurs naturally in the walking movement, a
considerable amount of effort on the part of the user is required
to overcome inertia.
To lessen the fatigue of the user resulting from inertia, an
inertia reducing means in the preferred form of elastic cords 64
and 65 are employed. The cord 64 is suitably connected between the
respective bows 28 of the pontoons 11 and 12 such as with screw
eyes 66. The cord 65 similarly interconnects the respective sterns
30 of the pontoons 11 and 12. In operation, when one of the
pontoons 11 or 12 reaches the fully forward position and the other
pontoon is positioned rearwardly thereof, the cords 64 and 75 will
be stretched and thus will biasingly urge the rearwardly disposed
one of the pontoons to catch up. Therefore, the elastic cords 64
and 65 will materially assist the user in overcoming inertia. Also,
by interconnecting the pontoons 11 and 12 in this manner, the
natural tendency for the pontoons to drift apart during use will be
resisted.
Another elastic cord 67 may be employed to interconnect the
pontoons 11 and 12 at their midship portions. This third cord 67
will also help to overcome inertia as described above and may also
serve as a stirrup which aids the user in mounting and
dismounting.
With reference to FIGS. 6, 7, and 8 wherein an improved propulsion
means is shown to include a pair of manually operable fins 68 and
70. The fin 68 is hingedly mounted on the side surface 20 of the
pontoon 12 and the fin 70 is hingedly mounted on the side surface
22 thereof. The fins 68 and 70 are moved between an outwardly
disposed position, best seen in FIG. 8, to a retracted position
flush with the side surfaces 20 and 22 by means of a cable 72. The
cable 72 is connected to each of the fins 68 and 70 substantially
intermediate the ends thereof, and extends laterally therefrom into
a guide tube 74 provided in the body 16 of the pontoon 12. The
guide tube 74 changes the direction of the cable 72 so that it
extends upwardly through the deck 24 and passes over a pulley 76
mounted on the deck. The pulley 76 changes the direction of the
cable 72 so that it is directed forwardly into engagement with a
second pulley 78 mounted on the deck 24 adjacent the boot 32. After
passing around the second pulley 78, the cable 72 is directed
upwardly so as to position a handle 80 within easy grasp of the
user. To maintain this upward disposition of the cable 72, the
second pulley 78 is formed with an upstanding tube 81 through which
the cable 72 is axially slidable. The upstanding tube 81 is
provided with a flange 82 at its upper end against which the handle
80 will rest when the fins 68 and 70 are not being manually
operated by the user.
An alternate method of propulsion is illustrated in FIGS. 9 through
12 wherein the elements and functioning of an extendable flapper
system is shown.
A plurality of flipper assemblies 84 are pivotably mounted to at
least the side surface 22 of each of the pontoons 11 and 12, and if
desired may also be mounted on the side surfaces 20 and the bottom
26 thereof.
A typical one of the flipper assemblies 84 may be seen best in
FIGS. 10 and 11 to include a substantially square frame 86 between
the opposing vertical sides 88 of which a plurality of horizontally
disposed flippers 90 are mounted. Each of the flippers 90 have two
pivot pins 92, with a different one extending from each of the
opposite ends thereof. The pins 92 are suitably journalled in the
side members 88 of the frame 86 so that each of the flippers 90 are
free to pivot about a horizontal axis formed by their respective
pivot pins 92.
Each of the flipper assemblies 84 is pivotably mounted by means of
suitable pivot pins 94 so as to be movable between extended
positions shown in solid lines in FIGS. 10 and 12 and retracted
positions shown in dashed lines in the same figures.
The flipper assemblies 84 which are mounted on the side surface 22
of pontoon 12 are interconnected by a tie-rod 95 so that they will
move in unison between the extended and retracted positions. The
flipper assemblies 84 which are mounted on the side surface 20 of
the pontoon 12 are similarly interconnected by a tie-rod 96.
An operator actuated lever 98 is pivotably carried in a suitable
stand 100 mounted on the deck 24. The lower end of the lever 98 is
connected to a transverse shaft 102 for moving that shaft fore and
aft as shown in FIGS. 10 and 12. The opposite ends of the
transverse shaft 102 have coupling levers 103 and 104 mounted
thereon which are connected to tie-rods 95 and 96, respectively,
for transmitting the movements of the shaft 102 to the tie-rods
which in turn will cause the flipper assemblies 84 to pivot between
their extended and retracted positions.
The flipper assemblies 84 (one shown) which are mounted on the
bottom 26 of the pontoon 12 are interconnected by a tie-rod 106 so
as to move in unison between the depending extended position and
the retracted position flush with the bottom 26. A user operated
lever 108 pivotably carried in a suitable stand 110 is connected to
the tie-rod 106 for controlling the movements thereof.
While the principles of the invention have now been made clear in
an illustrated embodiment, there will be immediately obvious to
those skilled in the art, many modifications of structure,
arrangements, proportions, the elements, materials, and components
used in the practice of the invention, and otherwise, which are
particularly adapted for specific environments and operation
requirements without departing from those principles. The appended
claims are therefore intended to cover and embrace any such
modifications within the limits only of the true spirit and scope
of the invention.
* * * * *