U.S. patent number 3,740,095 [Application Number 05/104,085] was granted by the patent office on 1973-06-19 for inflatable support structure.
Invention is credited to Walter Philip Nail.
United States Patent |
3,740,095 |
Nail |
June 19, 1973 |
INFLATABLE SUPPORT STRUCTURE
Abstract
The invention is directed to a lounge of sturdy construction
having special merit as a safe reliable sea lounge and is
characterized by the provision of an inflatable generally flat
central platform which is buoyant and substantially rigid when
inflated and which is surrounded with a plurality of separate
inflatable peripheral compartments rising above the platform when
inflated. The invention is further characterized by the arrangement
of the peripheral compartments which provide a buoyancy
distribution that will impart complete stability to the lounge when
in use in the water and yet will enable the lounge to be easily
mounted by a person in the water. The invention is further
characterized by the provision of a back and sides to support a
person on the lounge in a comfortable reclining position with his
weight properly oriented on the lounge.
Inventors: |
Nail; Walter Philip (Etobicoke,
Ontario, CA) |
Family
ID: |
22298600 |
Appl.
No.: |
05/104,085 |
Filed: |
January 5, 1971 |
Current U.S.
Class: |
297/452.41;
441/130 |
Current CPC
Class: |
B63B
7/08 (20130101); A47C 15/006 (20130101) |
Current International
Class: |
B63B
7/08 (20060101); B63B 7/00 (20060101); A49b
019/00 () |
Field of
Search: |
;297/DIG.3,445
;9/12,347 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Zugel; Francis K.
Assistant Examiner: Moore; Garry
Claims
What is claimed is:
1. An inflatable lounge comprising an inflatable generally flat
platform, said platform having upper and lower panels, when said
platform is inflated and maintained in substantially parallel
relation by a plurality of inflatable air compartments disposed in
spaced relation within said platform joined to said upper and lower
panels whereby the volume of air contained in said platform and
said plurality of air compartments disposed therein, is maximized
for greater buoyancy and rigidity, and a plurality of separate
peripheral compartments completely surrounding said central
platform when inflated, and means for inflating said central
platform, said plurality of air components disposed within said
platform and said peripheral compartments surrounding said
platform.
2. An inflatable lounge as claimed in claim 1 wherein said
peripheral compartments surrounding said platform rise above said
central platform when both said platform and said peripheral
compartments are inflated.
3. An inflatable lounge as claimed in claim 2 wherein said central
platform is rectangular in shape, said plurality of peripheral
compartments number 4, two disposed longitudinally on either side
and the others, one at either end, each peripheral compartment
being secured to its adjacent compartment.
4. An inflatable lounge as claimed in claim 3 wherein one of said
end compartments in substantially larger than the other of said end
compartment and said longitudinal compartments taper from said
larger end compartment towards said smaller end compartment.
5. An inflatable lounge as claimed in claim 4 further including a
back rest formation comprising a plurality of compartments
upstanding from and joined at the juncture of said enlarged end
compartment and said platform.
6. An inflatable lounge as claimed in claim 5 wherein said
plurality of compartments of said back rest formation are
juxtaposed and joined along their adjacent longitudinal sides, the
length of their respective edges secured to the juncture of said
base and enlarged end compartment.
7. An inflatable lounge as claimed in claim 6 in which said back
rest formation further comprising a substantially horizontally
disposed compartment surmounted on said upstanding plurality of
compartments.
8. An inflatable lounge as claimed in claim 7 wherein said back
rest formation further comprises on both sides of said horizontally
surmounted compartment and adjacent thereto, a plurality of
inflatable side compartments, forming side arms, disposed
substantially perpendicular to said base and upstanding back rest
formation, each of said side arms angled and tapered from said
horizontal compartment to meet the platform along the diameter of
an oblique cross-section through each arm cut by a plane parallel
to said upper and lower panel of said platform and passing through
the heat seal juncture of said platform and side compartment
adjacent to each side arm, said platform and side are being secured
along said diameter.
9. An inflatable lounge as claimed in claim 8 wherein a stress
panel is disposed in the area between each of said side arms, said
platform and said back rest heat sealed thereto.
10. An inflatable lounge comprising an inflatable generally flat
platform, said platform having upper and lower panels, when said
platform is inflated and maintained in substantially parallel
relation by means disposed therein whereby the volume of air
contained in said platform is maximized for greater buoyancy and
rigidity, and a plurality of separate peripheral compartments
completely surrounding said central platform when inflated, and
means for inflating said central platform, and said peripheral
compartments surrounding said platform.
Description
FIELD OF INVENTION
This invention relates to inflatable articles which may be used
either on land or water, in particular, to an inflatable
lounge.
BACKGROUND OF INVENTION
In recent years, articles for use in the water have been quite
popular, especially those inflatable. However, due to their
construction, they have had a tendency to tear, puncture easily,
leak, and, in particular, lacked stability when in the water,
tipping easily in normal use. One such article comprises an
inflatable water raft or air mattress having a base and head rest,
attached at one end, both disposed substantially horizontal, the
head rest floating somewhat higher in the water when both were
fully inflated. However, again these air mattresses were unstable,
uncomfortable, usually small, and lacked durability, due to their
construction, not having enough buoyancy to maintain a body lying
thereon, substantially out of the water, and tearing away easily
from said head rest.
SUMMARY OF INVENTION
It is an object of the present invention to overcome these problems
of a lack of durability, stability and comfort by providing a
lounge composed of inflatable chambers, joined one to the other or
preferably, formed from an overfolded single sheet or a pair of
superimposed sheets and heat sealed to form an integral unit as
will be described hereinafter. With this preferred formation, since
there are few actual junctures, but rather heat seal lines dividing
a single sheet of material into specified compartments, the
internal stress is lessened and where junctures do exist between
individual compartments, the length of these junctures is maximized
so that the resultant stress affects are minimized. In addition,
the invention further provides a lounge that is stable in the water
while in normal use, capable of supporting a user above the water
quite comfortably and securely. This is accomplished by providing a
central highly buoyant and substantially rigid inflated platform
and surrounding the platform with a distribution of buoyant
inflated chambers to accommodate the user's weight distribution
when on the lounge but affording easy mounting.
More particularly according to the present invention the basic
lounge is comprised of an inflatable, substantially rigid
horizontal central or base platform or mattress having upper and
lower surfaces maintained in substantially parallel horizontal
relation, and a plurality of inflatable peripheral compartments
encompassing said central platform, an inflatable back rest
formation and means for inflation, for example, a conventional
valve. The inflatable compartments preferably are joined one to the
next in the required formation by the preferable method of heat
sealing their respective edges.
Normally a compartment when inflated tends to balloon. In the past,
to prevent ballooning, the compartment was heat sealed
longitudinally to form narrow longitudinal tubes, their cumulative
effect was to retain a body lying thereon in a substantially
horizontal position. However, this formation diminished the buoyant
force exerted by the enclosed volume of air from that of the
ballooning compartment due to the volume of air decreased.
Moreover, such a structure has relatively little rigidity and will
fold under a concentration of weight at a particular point. It has
been left to the present invention to maximize the volume of air
contained for a greater buoyant force and to provide rigidity. This
is accomplished by the minimum of a plurality of tubes or air means
disposed in spaced relationship within the central platform and
attached to both the upper and lower surfaces thereof by heat
sealing at intervals. These seals may be accomplished along a
specific line of both surfaces, however, for greater durability,
circular heat seals are preferable, sealing the maximum allowable
areas for greater retention, thereby resisting tearing.
The peripheral compartments are disposed about the periphery of the
central platform for stability and support. Preferably the platform
is rectangular, and the plurality of compartments will number four,
two disposed longitudinally, on either side and the remaining two,
one at either end, each being heat sealed to the adjacent so as to
completely encompass the central platform. In stabilizing the
lounge, these compartments act as an outrigger, resisting capsizing
under abnormal conditions, for example, children playing thereon,
while in their supporting role, they aid the buoying of the body
therein. Since most of the weight is centered on the platform near
the back rest formation, the greater buoyancy force must be exerted
there. To accomplish this end, the end compartment adjacent said
back rest formation is enlarged, the side compartments being
enlarged in the area adjacent said back rest formation tapering to
said other end and said end compartment opposite said back rest
formation being smaller and narrower allowing for easier access to
the lounge, as will be described hereinafter. Although the platform
and encompassing compartments may be manufactured separately and
subsequently joined, the preferred method comprises the use of a
single sheet of material, preferably heat sealable, folding it over
and heat sealing the two sides together along specific lines to
give the required formation. In this way, when the support is
inflated, stress is minimized due to the one piece construction and
lack of actual juncture lines.
Upstanding at the heat seal juncture of the platform the enlarged
end compartment is a back rest formation comprising a plurality of
substantially parallel vertical compartments juxtaposed and joined
along their longitudinal edges, each to the adjacent, each
compartment upstanding on one of its ends at said juncture. A
horizontal inflatable compartment is preferably surmounted thereon
for greater strength, comfort and stability. Though individual
compartments may be joined, the preferable method comprises the
heat sealing of a single folded sheet of material into individual
compartments, as discussed previously.
The back rest formation may then be secured to the juncture of the
platform and the enlarged end compartment.
For added stability and support of said back rest formation, the
enlarged end compartment is preferably disposed so that the back
rest formation is retained substantially upright, thereby
minimizing the stress at its juncture if it were free to sway. Side
arms may be added for additional support of the back rest by
extending the horizontal surmounted chamber or adding side
compartments thereto, disposed substantially perpendicular to the
back rest and the platform, to be joined to the platform. However,
this will involve joining of two distinct compartments, the
platform and side arm; therefore to maximize the length of
juncture, the arms are tapered and angled from their juncture with
the horizontal compartment to meet the platform obliquely, as will
hereinafter be described; the diameter of the oblique cross-section
of each arm forming the line of juncture, the cross-section found
by taking a plane parallel to the platform through the heat seal
line between the platform and side compartment and having the plane
cut the angled side arms to expose an oblique cross-sectional area,
the side arm being sealed along the diameter of said cross-section
to the platform to form a closed compartment. The construction of
the side arms as indicated, leaves a substantial triangular area
between each side arm, base, and back rest. For increased strength
nd greater distribution of the stress, a stress panel may be
inserted into that area, or preferably, the back rest, side arms
and side panels, one of each disposed on each side of said back
rest, comprise a single sheet of material folded over and heat
sealed. This stress panel further lengthens the juncture of the
side arms to said platform and back rest, thereby minimizing stress
and affording greater resistance to tearing.
BRIEF DESCRIPTION OF DRAWINGS
The invention will now be described in relation to the accompanying
drawings, in which:
FIG. 1 is a perspective view of an inflatable bodily support
structure constructed according to a preferred embodiment of the
invention;
FIG. 2 is another perspective view of the structure shown in FIG.
1;
FIG. 3 is a perspective view of the reverse side of the structure
shown in FIG. 1;
FIG. 4 is a section taken along the lines 4--4 of FIG. 1.
The inflatable lounge described below may be constructed of a
variety of materials, for example, rubber, but the construction
particularly lends itself as stated, to the use of heat sealable
material. With reference to the FIGS. 1, 3 and 4, the lounge has an
inner portion 12, the base compartment or mattress, provided with a
conventional valve 14, see FIG. 3, for inflation. A preferred
construction of the inner portion 12 is more particularly shown in
FIG. 4 and consists of at least a pair of internally situated
spaced inflatable tubes 16 and 18, each tube being heat sealed to
the inner surface of the base compartment 12 to form a circular
seal at intervals indicated by these circular seals 20 to add
stability to said base when in the water and to retain the shape of
said base as a substantially flat horizontal mattress. Each tube 16
and 18 is provided with an individual conventional valve 22 and 24
conveniently located in an individual one of a circular seal 20.
After air is applied to valves 14, 22 and 24, the inner portion 12
with the enclosed tubes 16 and 18 constitutes an excellent
mattress.
Extending from the periphery of the base 12 are side chambers 26
and 28, each provided for independent inflation with an individual
conventional valve 30 and 32, see FIG. 3. Extending outward from
the opposed ends of the inner mattress 12 are further chambers 34
and 36, each provided also for independent inflation with an
individual valve 38 and 40 respectively. Though each of the
chambers 26, 28, 34 and 36 is inflatable independently of the
others, they are preferably constructed, along the base 12, of a
single sheet of heat sealable plastic material folded over and heat
sealed along lines 42, 44, 46, 48, 50, 52, 54 and 56.
The upper surface of the base 12 when it is inflated and in the
positions shown in FIGS. 1 and 3 it is below the level of the side
chambers 26 and 28 and the end chambers 34 and 36 when they are
also inflated. Further it will be observed that the end chamber 36
is somewhat narrower and lower than the end chamber 34, in order to
make it easier to board the lounge when it is floating in the
water. So that a greater buoyant force is applied to the area where
the user lies, the end compartment 34 is enlarged to hold a greater
volume of air, the side compartments 26 and 28 tapering from an
enlarged cross-sectional area at the end adjacent said enlarged end
compartment to a somewhat narrower cross-sectional area at the
other end, where compartment 36 has been narrowed to facilitate
boarding. In addition, compartment 34 is disposed so as to aid the
retention of the back rest formation 62 substantially erect. See
FIG. 2.
As indicated more particularly in FIGS. 1 and 2, an inflatable back
rest formation, generally denoted by the numeral 62, is secured to
the lounge outward of the base 12 and inward of the side chambers
26 and 28 and the end chambers 34 and 36. The inflatable back rest
formation, including side arms 62 is preferably made of heat
sealable material, and is secured to the lounge along the heat seal
line 44, and the side arms on each side along the heat seal lines
42 and 46. The back rest 62 when inflated is preferably formed from
a single sheet of plastic material, heat sealed into separate,
vertically extending compartments 64, 66, 68 and 70, each provided
with an individual valve 72, 74, 76 and 78 respectively.
Surmounting the vertically extending compartments 64, 66, 68 and 70
is a separate, somewhat larger, horizontally disposed chamber 82
which is joined by the heat sealing of the plastic tube to separate
side chambers, side arms 84 and 86 or extended as a continuous
compartment to form those side arms, which angle and taper
downwardly as shown in a direction towards but short of the end
chamber 36, all of which back rest, including the side arms, may
have been formed from a single sheet of plastic, folded over and
heat sealed to form the desired configuration of compartments. This
tapering assists in preventing tearing and consequent separation of
the inflatable back rest, which includes the side arms, 62 at its
forwardmost juncture with the inner portion 12 along the heat seal
lines 42 and 46, said juncture accommodated along lines 42 and 46
with the diameter of an oblique cross-section of each side arm,
formed by taking a plane parallel to the upper panel of said base
12 through the heat seal lines 42 and 46 cutting said angled side
arm obliquely to expose said horizontal cross-section. A stress
panel 88 on either side in the area between the inflatable tapering
side arm, the back rest and base further distributes the stress
over the resultant greater length of juncture between said side
arms and said base and back rest preventing the side arms from
tearing away from said base or back rest at their points of
juncture during normal use.
* * * * *