U.S. patent application number 11/197686 was filed with the patent office on 2005-12-08 for portable flotation platform for shallow bodies of water.
Invention is credited to Sehl, James Francis.
Application Number | 20050271477 11/197686 |
Document ID | / |
Family ID | 35449098 |
Filed Date | 2005-12-08 |
United States Patent
Application |
20050271477 |
Kind Code |
A1 |
Sehl, James Francis |
December 8, 2005 |
Portable flotation platform for shallow bodies of water
Abstract
A portable flotation platform is disclosed for use in supporting
a load of equipment, hunting dogs, or personnel above the level of
a body of water. The platform includes a deck constructed to be of
an overall density less than that of water and sized so as to
support the load above the level of the water. An anchor device
extends down to the bottom of the water and up to the deck to hold
the deck on station in the water. The deck and anchor device are
sized and shaped to nest together, so that platform has a carrying
mode in which the deck and anchor device are held together to
facilitate a user carrying the platform to and from a point of
deployment at a body of water, and a deployment mode in which the
deck and anchor device are spaced apart from each other to enable
the deck to be positioned at the surface of the body of water and
the anchor device positioned at the bottom of the body of
water.
Inventors: |
Sehl, James Francis;
(Garvin, MN) |
Correspondence
Address: |
Carl Rowold
11936 Streamside Dr.
Loveland
OH
45140
US
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Family ID: |
35449098 |
Appl. No.: |
11/197686 |
Filed: |
August 4, 2005 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11197686 |
Aug 4, 2005 |
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10615269 |
Jul 8, 2003 |
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6926468 |
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10615269 |
Jul 8, 2003 |
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10191245 |
Jul 9, 2002 |
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6648554 |
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Current U.S.
Class: |
405/218 ;
405/221 |
Current CPC
Class: |
B63B 21/00 20130101;
E02B 3/064 20130101; B63B 22/04 20130101 |
Class at
Publication: |
405/218 ;
405/221 |
International
Class: |
B63C 001/00; E02B
003/20 |
Claims
What is claimed is:
1. A portable flotation platform for supporting a load above the
level of a body of water, the platform comprising: a deck having an
overall density less than that of water and presenting a generally
planar upper surface for supporting the load; an anchor device
which when deployed and connected to the deck holds the deck
against horizontal movement; the deck having at least one connector
for detachably securing the deck to the anchor device for vertical
movement of the deck relative to the anchor device, with the anchor
device comprising a frame, anchor legs extending down from the
frame and engageable with a bottom of the body of water, and an
anchor arm extending up from the frame toward and engageable with
the deck; and a carrying attachment on the platform for enabling
the user to carry the platform to a point of deployment.
2. The platform of claim 1 wherein the platform has a carrying mode
in which the deck and frame are held in engagement, and a
deployment mode in which the deck and frame are spaced apart from
each other.
3. The platform of claim 2 wherein the deck and frame are shaped to
enable the deck and the frame to nest together when the platform is
in the carrying mode.
4. The platform of claim 1 wherein the anchor legs are pivotally
mounted to the frame.
5. The platform of claim 1 wherein the anchor legs are of
telescoping construction to enable them to moved between a
retracted configuration to facilitate carrying the platform and an
extended configuration for deployment of the deck.
6. The platform of claim 1 wherein the carrying attachment
comprises a pair of carrying straps.
7. The platform of claim 1 wherein the carrying attachment is
attached to the frame.
8. The platform of claim 1 wherein the deck comprises an upper
member of generally rigid sheet material, a lower member of
generally rigid sheet material and foam material between the upper
and lower members.
9. The platform of claim 1 wherein the anchor arm comprises a pole
detachably secured to the frame.
10. The platform of claim 9 wherein the frame comprises an anchor
support stand to which the pole is detachably secured.
11. The platform of claim 1 wherein the anchor device comprises a
plurality of anchor arms.
12. The platform of claim 1 wherein the anchor connector comprises
an opening in the deck to receive the anchor arm.
13. The platform of claim 2 wherein the deck includes a housing for
receiving the anchor arm when the platform is in its carrying
mode.
14. The platform of claim 13 wherein the housing comprises a
channel formed at the lower side of the frame, with an opening at
the upper side of the channel.
15. The platform of claim 14 wherein the deck closes the opening in
the channel to hold the anchor arms in the housing when the
platform is in its carrying mode.
16. A portable flotation platform for supporting a load above the
level of a body of water, the platform comprising: a deck having an
overall density less than that of water and presenting a generally
planar upper surface for supporting the load; an anchor device
which when deployed and connected to the deck holds the deck
against horizontal movement; the deck having at least one connector
for detachably securing the deck to the anchor device for vertical
movement of the deck relative to the anchor device, with the anchor
device comprising a frame, anchor legs extending down from the
frame and engageable with a bottom of the body of water, and an
anchor arm extending up from the frame toward and engageable with
the deck; and the platform having a carrying mode in which the deck
and frame are held in engagement to enable a user to carry the
platform to and from a point of deployment, and a deployment mode
in which the deck and the frame are spaced apart from each other
with the deck floating at the surface of the body of water and the
frame adjacent the bottom of the body of water for holding the deck
in horizontal position in the body of water.
17. The platform of claim 16 wherein the deck and frame are shaped
to enable the deck and the frame to nest together when the platform
is in the carrying mode.
18. The platform of claim 16 wherein the anchor legs are pivotally
mounted to the frame.
19. The platform of claim 16 wherein the anchor arm comprises a
pole detachably secured to the frame.
20. The platform of claim 19 wherein the frame comprises an anchor
support stand to which the pole is detachably secured.
Description
RELATED PATENT APPLICATIONS
[0001] This application is a continuation in-part of U.S. patent
application Ser. No. 10/615,269, filed Jul. 8, 2003, which is a
continuation in-part of U.S. patent application Ser. No.
10/191,245, filed Jul. 9, 2002, now U.S. Pat. No. 6,648,554.
BACKGROUND OF THE INVENTION
[0002] This invention relates to portable flotation platforms, and
more particularly to platforms adapted to be deployed in shallow
bodies of water for supporting relatively light loads, such as
equipment, hunting dogs and personnel, above the level of the body
of water.
[0003] Duck hunters hunting in wetland areas having shallow bodies
of water typically rely on dogs to retrieve the fowl that they
down. When the hunter is in a boat, the dogs can stand-by in the
boat with the hunter, but this is often not desirable and a better
place for the dogs at the hunt is needed. When the bodies of water
are shallow enough to allow the hunter to stand but not for the
dogs to do so, the dogs must stand-by on firm ground, which is not
always available nearby, or the dogs must keep themselves afloat in
the water which is exhausting and perhaps even dangerous to the
dogs. Again a better place for the dogs to stand-by is needed.
[0004] Similarly, fishermen, environmentalists and park personnel
frequenting wetlands with shallow bodies of water need to support
their respective equipment above the level of the water. In some
areas, the use of a boat, even a small boat or canoe, is not
practical because of the shallow depth of the water or because
excessive portage of the boat would be required. In a manner
similar to hunters seeking a better place for their dogs on trips
to the wetlands, these users of the wetlands seek a better place
for their equipment.
[0005] Further, people working in wetlands, such as directional
drillers when drilling generally horizontal wells or bores for
pipelines or other utilities, need a temporary platform above the
water to facilitate their work. The platform for these workers as
well as for hunters and fishermen need to be large enough to
support their personal weight, but light weight, easy to deploy and
inexpensive.
SUMMARY OF THE INVENTION
[0006] Among the features of the invention is the provision of a
portable flotation platform which may be carried by the user to and
from the wetlands point of deployment, either directly by being
carried by the user to the point or indirectly by being carried by
the user to a boat for transport the remaining distance to the
point of deployment. Another feature is the provision of a platform
for the support of a load of equipment or hunting dogs above the
water level in a generally stationary position.
[0007] More particularly, a portable flotation platform is
disclosed for supporting a load, such as a load of equipment or
hunting dogs, above the level of a body of water. The platform
includes a deck constructed to be of an overall density less than
that of water and presenting a rigid upper member for carrying the
load above the water level. An anchor is provided as part of the
platform which when deployed engages the bottom of the body of
water to hold against movement across the bottom and extends up
toward the surface of the water. The deck has at least one
connector for detachably securing the deck to the anchor to prevent
horizontal movement of the deck. A carrying attachment is provided
on the deck for enabling a user to carry the platform to and from a
point of deployment at the body of water, preferably in a manner
similar to a back pack.
[0008] Among other features of the invention are an anti-skid upper
surface to prevent movement of the load across the deck, an
interior storage chamber in the deck for housing the anchor when
not in use, an adjustable length anchor to accommodate bodies of
water of differing depths and a stop detachably secured on the
anchor to limit upward movement of the deck, such as might
otherwise occur with wave action on the body of water.
[0009] Further features of this deck include light weight to
facilitate the user carrying this deck to a point of deployment,
via backpack type straps, a handle or wheels at one end of the deck
for larger, personal sized embodiments of the invention. The deck
further features anchor storage for carrying the anchor along with
the deck either in an interior storage chamber in the deck, or at
the exterior of the deck. A back-pack type bag may be provided to
facilitate carrying the deck. A boat attachment device secures the
deck against horizontal movement relative to a boat, while allowing
vertical movement of the deck.
[0010] Other features of the platform include the anchor device
being of a rigid frame construction, with extendable legs to
provided greater stability when deployed in the water.
[0011] Other features of the platform include shaping the deck and
an anchor frame of the anchor device so as to enable the deck to
nest within the frame for a self-contained and more compact
platform size for enabling a user to carry the platform to and from
a point of deployment.
[0012] Other features and advantages will be in part described and
in part apparent from the following figures and descriptions.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a perspective view of the platform of this
invention as deployed in a body of water, but with certain
components removed from this view for greater clarity of the
relationship of the deck and anchor to the body of water;
[0014] FIG. 2 is a perspective view of the deck with certain
components removed from this view for greater clarity of the
interior construction details of the deck;
[0015] FIG. 3 is a perspective view of the bottom of the deck with
carrying straps attached;
[0016] FIG. 4 is a perspective view of the top or upper member of
the deck with a decoy bag attached;
[0017] FIG. 5 is an exploded view of an anchor pole showing two
pole segments and a connector to be telescoped between the
segments;
[0018] FIG. 6 is a side view of a spring clip forming part of the
anchor pole connector for detachably securing the pole segments
together;
[0019] FIG. 7 is a longitudinal section of a stop to be positioned
on an anchor pole;
[0020] FIG. 8A is a perspective view of an alternative embodiment
of the deck showing handles at an end and a side of the deck, as
well as wheels at the other end of the deck;
[0021] FIG. 8B is a perspective view of one corner of an
alternative embodiment of the deck showing a handle integrally
formed as a recess in the deck;
[0022] FIG. 8 C is a perspective view of the deck showing a handle
in the form of a strap;
[0023] FIG. 9A is a perspective view of an alternative embodiment
of the deck showing anchor storage at the bottom of the deck;
[0024] FIG. 9B is a section view of the deck along line B-B of FIG.
9A showing anchor poles in the anchor storage recesses;
[0025] FIG. 9C is a perspective view of a further alternative
embodiment of the deck showing anchor storage at the side of the
deck;
[0026] FIG. 9D is a perspective view of resilient clips at the side
of the deck for anchor storage;
[0027] FIG. 10 is an elevation view of the deck connected by a boat
attachment device to the side of a boat;
[0028] FIG. 11 is a perspective view of a backpack type bag for
holding and carrying the deck; and
[0029] FIG. 12 is a perspective view of a user carrying the deck by
backpack straps on the deck.
[0030] FIG. 13 is a top view of a further embodiment of the
platform in its deployment mode, with the legs of the anchor device
pivoted outwardly.
[0031] FIG. 14 is a side view of the platform of FIG. 13 in its
deployment mode with the floatable deck near the upper surface of
the body of water, and the anchor device on the bottom of the body
of water.
[0032] FIG. 15 is top view of the platform of FIG. 13 in its
carrying mode, with the deck nested within the anchor frame, and
with the anchor legs pivoted upwardly.
[0033] FIG. 16 is a bottom view of the platform of FIG. 13 in its
carrying mode, with the anchor arm poles housed in the anchor
frame.
[0034] Corresponding elements and reference numbers are the same
among the various figures of the invention.
DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT
[0035] Referring to FIG. 1 of the drawings there is generally
indicated at 1 a preferred embodiment of this invention for
supporting a load of equipment, hunting dogs or personnel (not
shown) above the level of a shallow body of water 3. Hunting dogs
often accompany hunters on a hunting trip to wetlands or lakes
having one or more shallow bodies of water. When the water is so
shallow that a hunter can stand on the bottom, the water may still
be too deep to enable the dogs to do so. The platform 1, when
deployed as shown in FIG. 1, provides a suitable structure for
supporting the dogs slightly above the water level. As described
hereinafter, the platform may be installed in relatively deep
bodies of water (i.e., too deep for a hunter to stand and thus
requiring a boat for the hunters) and yet provide a suitable
structure to support the hunting dogs, or to be installed relative
to a boat.
[0036] The equipment positioned on the platform may include not
only hunting and fishing equipment, but also other wetlands related
equipment, such as water quality monitoring equipment for
environmentalists and state agencies. Indeed, as described
hereinafter, the platform is sized so and so constructed that it
may support any number of different types of live or dead loads, up
to weights of approximately between 70 to 100 pounds for smaller
size decks and 180 pounds or more for larger size decks for
supporting a hunter, fisherman or other personnel. Further, as also
described in detail herein, the platform may be carried by users to
and from a point of deployment at the body of water directly by the
user or indirectly by the user to a boat, and be readily deployed
on site. For smaller size decks, the user may carry the deck via a
handle to a boat or via backpack straps directly to the point of
deployment at the body of water. For larger size decks, the
platform may be carried by the user via wheels and handles on the
deck.
[0037] As shown in FIG. 1, the platform comprises a deck 5
constructed to be of an overall density less that that of water so
as to float on the water, and an anchor of suitable design, such as
indicated generally at 7, engagable with the bottom 9 of the body
of water and the deck for holding the deck on station in the water
against horizontal movement. The preferred anchor is shown as
comprising poles 11 extending down into the bottom 9 of the body of
water and up above the surface of water 5. Four poles are shown as
being provided, one at each corner of the deck, but a greater or
lesser number of poles may be provided and be positioned at other
points at the interior or the exterior of the deck, while remaining
within the scope of this invention. Stops 13 may be detachably
secured to the poles 11 at desired locations on the poles to
prevent upward movement of the deck 5 beyond the stops. Thus, the
deck may be held down by the stops some distance below the level
that the deck would otherwise occupy in the water 3 to bias the
deck up against the stops, and thus hold the deck stable against
vertical movement when waves on the surface of the water hit the
platform or as loads are placed on or removed from the deck.
[0038] As best illustrated in FIG. 2, the deck 5 is of generally
box-like construction having a bottom 15, an upper member 17, as
well as opposed ends 19 and sides 21 extending between the bottom
and upper member. These members are formed of pieces of suitable
thermoplastic sheets and are secured together along their edges by
suitable primary or secondary bonding. The deck may be made by
other suitable fabrication or molding processes, such as a
so-called roto-casting process in which plastic beads are
positioned within a mold in the shape of the deck, with the mold
then heated, rotated and cooled to form a single, unitary molded
product in the final shape of the deck. In its interior, the deck
has at least one buoyancy chamber 23 (and as shown in FIG. 2, two
such buoyancy chambers) filled with a suitable plastic foam
material, such as Styrofoam, to reduce the effective density of the
deck. The deck may also have an interior storage chamber 25 for
housing the anchor poles 11 when not in use to facilitate
transporting the poles with the deck. The chamber 25 extends the
length of the deck and is sized to receive all of the poles. An
opening 27 in the end of the deck at the chamber provides access to
the chamber for positioning the poles in and withdrawing the poles
from the chamber. A cap 29 with a hinge or other suitable tether to
the end 19 of the deck and a latch selectively closes the opening
to hold the poles in place in the chamber during transit as well as
to keep water out while the deck is in use. As described more fully
hereinafter, the deck may also be formed without the incorporation
of an interior anchor storage chamber, but rather with an anchor
storage at the exterior of the deck. Further, the deck may be
formed using a void in lieu of plastic foam at its interior as part
of the buoyancy chambers, and to use the entire interior cavity of
the deck as a single large buoyancy chamber.
[0039] Suitable anchor connectors 31 to the anchor poles 11 are
provided on the deck, such as short lengths of plastic tubing
secured at each of the four corners of the deck. The openings or
apertures of the connectors 31 are sized to receive the anchor
poles 111 in sliding engagement to enable the anchor to hold the
deck on station against horizontal movement while enabling vertical
movement of the deck up and down on the anchor poles with changes
in water level or deck loading. Attached at the exterior of the
deck are a series of generally U-shaped brackets 33 for attachment
of back-pack type carrying straps 35, and a decoy bag 37 as more
fully described below.
[0040] Overall the smaller size deck is preferably approximately
36" long, 20" wide, and 4' thick and weights approximately 18
pounds, including the anchor poles. So constructed, the deck may be
carried, preferably like a back-pack, to the site of use. The deck
may also be carried like a suitcase via handles (such as handles
59, 65 or 67 described below) to a boat for deployment. Once the
platform 1 is deployed, the deck 5 provides sufficient size to able
equipment or a dog to remain stable on the upper surface, and
sufficient buoyancy to support this load. Alternatively, as
described more fully hereinafter, the deck may be of a larger size
up to 6" (or thicker) and approximately 48" long (or longer) and
approximately 30" wide (or wider) so as to provide enough buoyancy
as to support the weight of a person. So constructed, the deck may
weigh 40 pounds or more. This would make carrying the deck on the
user's back more difficult. As shown in FIG. 8A one or more wheels
and/or handles may be provided to facilitate the user carrying the
deck to the point of deployment or t a boat for deployment at the
water, either directly or indirectly by the user carrying the deck
to a boat.
[0041] FIG. 3 shows the bottom 15 of the deck, with a carrying
attachment in the form of two carrying straps 35 at opposite sides
of the bottom. Each strap is secured at its lower end to a bracket
33 at the side 21 of the deck and at its upper end to a bracket 33
at a generally central region of the bottom of the deck. A fastener
on the carrying strap enables adjustment of the effective length of
the strap between its upper and lower ends to fit the size of the
user. The straps may also include clasps (not shown) detachably
securing the straps to the deck for enabling easy removal of the
straps from the deck, such as when the platform is deployed.
[0042] FIG. 4 shows the upper member 17 of the deck, with a decoy
bag 37 detachably secured over the upper surface. The decoy bag is
preferably of mesh construction and is attached by a series of
straps to brackets 33 at the sides and an end of the deck. Clasps
39 are provided on each strap to enable removal of the decoy bag
when the deck is deployed, thereby exposing the surface of the
upper member. This surface is preferably of a suitable anti-skid
construction, such as outdoor carpeting 41 bonded to the upper
member, to prevent the unintended movement of the load (such as
that of a dog or equipment) across the deck.
[0043] As shown in FIG. 5, the anchor 7 preferably comprises a pole
of extensible length, which in turn comprises one or more pole
segments 43 detachably secured together. More particularly, the
pole segments are formed of a suitable tubing such as aluminum
tubing slightly shorter than the length of the deck 5. The pole
segments are detachably secured together by a connector 45, such as
a short length of tubing, telescoped within one end of the pole
segment. The tubing connector 45 is positioned wholly within the
pole segment 43 when not in use to connect pole segments to
facilitate positioning the pole segments in the deck anchor storage
chamber 25. Alternative forms of anchor storage are shown in FIGS.
9A-9D for storing the anchor at the exterior of the deck when the
anchor is not in use.
[0044] To connect the pole segments, the tubing connector is moved
to a position extending approximately one half of its length beyond
the end of the tubing segment. A suitable fastener is provided at
each end of the tubing connector, such as the spring clip 47 shown
in FIG. 6 received in the connector. Each spring clip has a pair of
arms biased outwardly to a position wider than the tubing connector
and has a lateral projection 49 at the end of each arm. The tubing
and the pole segments have holes 51 extending there through that
register when the pole segments are connected end-to-end over the
tubing connector 45. In this position, the projections 49 on the
spring clip are moved out under the spring bias through the
corresponding holes 51 to secure the pole segments together.
Preferably, the pole segments are of non-circular section, such as
octagonal as shown in FIG. 5, to facilitate bringing the holes and
spring clips into register. Disassembly of the pole segments can be
effected by manually depressing the projections 49 on the spring
clips, such as by finger pressure, while applying force to pull the
post segments 43 away from each other.
[0045] As shown in FIGS. 5 and 7, the stop 13 is constructed of
tubing of generally the same sectional shape as the anchor poles
11, but of slightly larger size than the anchor poles 11 and the
apertures in the anchor connectors, so to act as a collar in
sliding engagement along the pole and as a point of contact with
the deck to limit upward movement of the deck. The stop has a
fastener, such as the L-shaped bolt 53 threaded into a threaded
bore 55 opening to the interior of the stop. The bolt when threaded
into the bore projects into engagement with the pole segment to set
the collar in the desired position on the anchor pole. A tether 57
secured at one end thereof to the bolt 53 holds the bolt attached
to the stop at times when the bolt is not threaded in the bore,
such as during storage of the anchor poles. Similarly, the stop may
be provided with a hole and the pole provided with a spring clip 47
to hold the stop on the tubing during storage.
[0046] In the use of the platform 1 of this invention, the deck,
with the anchor poles 11 in the storage chamber and the decoy bag
37 preferably attached, is carried by the user by the handles to a
boat or on the user's back using the carry straps 35 to the point
of deployment of the platform in the wetlands or shallow lakes. The
user then removes the anchor poles from the deck. If the water
depth requires that the anchor poles be of extended length, a
suitable number of segments are assembled together by use of the
tubing connectors 45. The anchor poles are then positioned in the
body of water 3 so as to extend down through one or more of the
anchor connectors 31 in the deck and penetrate the bottom 9 of the
body of water. Stops 13 may then be positioned on the anchor poles
and set in position by means of bolt 53 to engage the deck and hold
it partially depressed in the water to make the deck more stable in
a vertical direction. With the platform thus deployed as shown in
FIG. 1, a load of equipment or a dog may be supported on the deck.
Disassembly of the platform 1 for transport away from the site of
deployment may be effected by reversing the steps described
above.
[0047] Referring to FIG. 8A, an alternative embodiment of the deck
5 is illustrated having a suitable hand attachment device on the
deck for enabling a user to lift and carry the deck to the point of
deployment at the body of water either directly or indirectly via a
boat or other means of transport. The device may comprise a rigid
handle fixedly secured to and projecting from the exterior of the
deck, such as handles 59 at the end of the deck, or a handle pinned
to the deck, such as a handle 61 pinned to the side of the deck.
The device may also take the form of a recess, such as recess 65 in
FIG. 8B formed in the exterior of the deck sized and shaped to
enable a person to readily grasp the deck via the recess. A further
alternative of the handle is shown in FIG. 8C to comprise a strap
of flexible material 67 attached to the deck. For carrying larger
size decks, the handles may be used in conjunction with one or more
wheels provided on the deck. Two such wheels 63 are shown in FIG.
8A at opposed corners of the deck, with the wheels projecting down
below the plane of the bottom of the deck to provide ground
clearance. The wheels are pinned to the deck for rotation about a
horizontal axis when rolling the deck over the ground, with the
handle being at the opposite end of the deck.
[0048] Alternative forms of anchor storage are shown in FIGS.
9A-9D. The anchor storage of FIG. 9A comprises one or more recesses
69 formed in the deck, such as at the bottom 15 of the deck, to be
of a size and shape to receive the anchor. More particularly, the
recesses are long enough to receive the anchor poles 11. A suitable
closure, such as recesses 71 and straps 73 detachably secured in
the recesses 71, are provided to hold the anchor in the recesses,
see FIG. 9B. The anchor storage may also comprise one or more
strips of material, such as strips 75, secured to the exterior of
the deck in the form of a hoop so as to present apertures for
receiving the anchor 11, see FIG. 9C. A stop projects from the deck
in alignment with the aperture to prevent movement of the anchor
poles down through the apertures when the deck is held upright. A
suitable closure, such as a two-piece strap 77 secured at its ends
and having a clasp, may otherwise be provided to detachably hold
the anchor in its storage. The storage of FIG. 9C may also take the
form of a tube or bag secured to the deck and presenting an
aperture to receive the anchor. In addition, as illustrated in FIG.
9D, the anchor storage may take the form of one or more resilient,
generally U-shaped clips, such as clips 81, that deform to receive
and release the anchor. The deck 5 may also be configured to
detachably store boat attachment devices 83 as described below.
[0049] Referring now to FIGS. 13-16, a further embodiment of the
platform is shown at 201. The platform comprises an upper floatable
deck 203 and a lower anchor device 205 of a generally frame
construction of a suitable material, such as aluminum or plastic,
with a open central area. As described more fully hereinafter, the
deck and the central opening of the frame are of generally similar
shape and size so that the deck may be nested within the open
central area of the anchor device 205. Thus the platform of this
embodiment is operable in a deployment mode when the deck and the
frame are spaced apart for use in a body of water as shown in FIGS.
13 and 14, and in a carrying mode when the deck is nested within
the anchor device to facilitate the user in carrying the platform
to and from a point of deployment at the body of shallow water as
shown in FIGS. 15 and 16. In its carrying mode, the platform
presents a relatively compact generally rectangular structure, such
as a structure approximately 29 inches long, 22 inches wide and 8
inches thick, suitable for carrying by the user.
[0050] As shown in FIG. 13, the deck 203 is of suitable
construction so as to present a rigid upper surface upon which a
load may be positioned, and be of an overall density less than that
of water to provide a buoyant force to support the load when the
platform is deployed in a body of water. Preferably the deck is of
sandwich type construction having a generally rectangular upper
member 207 of generally rigid sheet material, such as thermoplastic
sheet, a lower member 209 of generally rigid sheet material, such
as of the same sheet material as the upper member, and an
intermediate layer 211 of a suitable non-absorbent elastomeric foam
material, such as polystyrene foam, between the upper and lower
members. The foam is approximately 5-6 inches thick to provide the
desired buoyant force for the deck when immersed in the water. The
sides 213 of the deck taper inwardly from the upper member 207 to
the lower member 209 to facilitate positioning the deck in the
frame when the platform is in its carrying mode. An aperture 215 is
provided in the deck extending up from the lower member 209 through
the intermediate layer of foam 211 and the upper member 207 to
constitute a connector for detachably securing the deck to the
anchor device when the platform is in its deployment mode. Four
such apertures, one at each corner of the deck, are shown in FIGS.
13 and 15.
[0051] As indicated above, the lower anchor device 205 comprises a
frame with a central opening of shape generally corresponding to
the deck but slightly larger than the peripheral dimensions of the
deck and with inwardly tapered sides to enable the deck to be
nested in the frame as shown in FIGS. 15 and 16. The anchor device
further comprises anchor legs 221 extending down from the frame for
engaging the bottom of the body of water, when the platform is
deployed. The anchor legs are pivotally mounted at the underside of
the frame, and are movable between and are selectively secured in a
downward position, as shown in FIGS. 13 and 14, when the platform
is in its deployment mode, and a raised position at the underside
of the frame, as shown in FIG. 16, when the platform is in its
carrying mode. The legs are preferably of two-piece telescoping
construction with a suitable latching mechanism so the legs may be
moved to and selectively held in an extended position when the
platform is in its deployment mode. The legs are also movable to
and selectively held in a retracted position, when in the platform
is in its carrying mode. A total of four legs 221 are provided, one
at each corner of the frame, with the two legs at each end of the
frame being connected by a cross member 222 to provide added
mechanical strength to the legs.
[0052] The anchor device further comprises at least one suitable
anchor arm, such as pole 217, one for each connector aperture 215
in the deck 203. As with the other embodiments of the platform, the
anchor arms (together with the rest of the anchor device) acts to
hold the deck on station against horizontal movement in the body of
water, while enabling the deck to move vertically relative to the
anchor device. Internal pole connectors 219 are provide to enable
two poles to be selectively connected to extend the length of the
anchor arm for deploying the platform in deeper water. A suitable
stop, collar 227 of larger outer diameter than the diameter of the
apertures 215 in the deck may be selectively secured on the anchor
arm at any vertical position to prevent upward the deck, beyond a
predetermined position. Suitable anchor supports, such as stands
225, are provided on the frame extending up from the lower side of
the frame. The poles 217 are adapted to be telescoped over and
selectively latched to the anchor stands, when the platform is in
its deployment mode. The poles 217 are removed from the stand 225,
and any poles that are connected are separated into individual pole
members to facilitate storage of the poles 217, when the platform
is in its carrying mode.
[0053] The anchor device further has a suitable housing, such as
recess or channel 223 in the lower side of the frame, for receiving
and storing the poles 217, when the platform is in its carrying
mode. The channel extends the length of the anchor device and
presents an upper opening to receive the poles. The opening
presented by the channel is closed by the lower member of the deck,
when the platform is in its carrying mode to hold the poles in the
frame. The recess 223 may also hold the internal pole connectors
219 and the anchor collars 220, when not in use.
[0054] To facilitate carrying the platform to and from its points
of deployment when in its carrying mode, a suitable carrying
attachment, such as a pair of carrying straps are provided. The
carrying straps are detachably secured to the frame and extend up
from their lower ends at opposite sides of the frame to their upper
ends at a cross member 227 provided adjacent an upper end of the
frame.
[0055] The deck and frame may be of another suitable shape than
that described above, the number of anchor legs and anchor arms may
be of another suitable number than that described above, the anchor
arm may take some form other than the channel described above, such
as clips or other attachment devices, and the deck and anchor
device may be made of other suitable materials than those described
above, and such platform would still remain within the intent and
scope of the inventions of this application. Further the carrying
attachment may be of a form other than the pair of carrying straps
shown in FIG. 16, such as a handle or wheels as described in other
embodiments of the inventions.
[0056] It will be understood that one skilled in the art may make
modifications of the preferred embodiment shown herein within the
scope and intent of the claims of this application. While the
present invention has been described in terms of a specific
embodiment thereof, it is not intended the present invention should
be limited thereby, but is intended to cover the invention broadly
within the scope and spirit of the claims.
* * * * *