U.S. patent number 3,864,768 [Application Number 05/379,067] was granted by the patent office on 1975-02-11 for water mattress with internal float tube.
This patent grant is currently assigned to Said Fraige by said Read. Invention is credited to Richard Fraige, Jerry Read.
United States Patent |
3,864,768 |
Fraige , et al. |
February 11, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
WATER MATTRESS WITH INTERNAL FLOAT TUBE
Abstract
A waterbed, or more properly, a water mattress, conventionally
employs a water inflated, bag-like membrane enclosure which is
confined about its rectangular perimeter with a rigid frame
supporting its vertical surfaces and whose bag-like enclosure
includes a top panel spaced above a bottom panel with their
respective peripheral edges interconnected with side and end panels
respectively to form the water-tight enclosure, can be improved by
utilizing an internal pneumatic float tube or tubes which are
operable to float along the side and end panels to provide a
buoyant edge support around the periphery of the top panel when the
enclosure has been filled with water, thereby improving the comfort
and convenience of the water mattress.
Inventors: |
Fraige; Richard (Alameda,
CA), Read; Jerry (Alameda, CA) |
Assignee: |
Said Fraige by said Read
(N/A)
|
Family
ID: |
23495674 |
Appl.
No.: |
05/379,067 |
Filed: |
July 13, 1973 |
Current U.S.
Class: |
5/687 |
Current CPC
Class: |
A47C
27/081 (20130101); A47C 27/085 (20130101) |
Current International
Class: |
A47C
27/08 (20060101); A47c 027/08 () |
Field of
Search: |
;5/348R,349,350,348WB
;219/217 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gilliam; Paul R.
Assistant Examiner: Calvert; Andrew M.
Attorney, Agent or Firm: Phillips, Moore, Weissenberger,
Lempio & Strabala
Claims
What is claimed is:
1. An improved water mattress with edge support which is adapted to
be confined in a rigid box-like waterbed frame comprising:
a water inflatable bag-like enclosure having a top panel, a
parallel, spaced-apart bottom panel and edge panels sealingly
interconnecting said top and bottom panels to form a water-tight
enclosure;
a water filling and valve means in one of said panels having fluid
communication with the interior of said bag-like enclosure;
at least one float tube means hingedly connected at one edge
internally within said enclosure adjacent to and along one edge
panel thereof in a manner allowing it to move between said top and
bottom panels independently of said one edge panel, said float tube
means forming an internal, fluid-tight chamber within said bag-like
enclosure; and
an air filling and valve means located in one of said panels and
having fluid communication with said fluid-tight internal chamber
whereby said float tube means can be pneumatically inflated to
provide edge support for said top panel along the top of said one
edge panel through its buoyancy in relation to the fluid filling
said bag-like enclosure.
2. The improved water mattress defined in claim 1 wherein said
float tube means is mounted in a manner which allows it to move
vertically within the bag-like enclosure when the latter is filled
with water.
3. The improved water mattress defined in claim 2 wherein the float
tube means is centrally connected on the one edge panel to allow
movement thereof between the top and bottom panels.
4. The improved water mattress defined in claim 2 wherein the top
and bottom panels are rectangular and the edge panels are composed
of two side panels and two end panels.
5. The improved water mattress defined in claim 4 where a float
tube means is connected adjacent to and along each side panel
thereof and each float tube means extends substantially the full
length of its associated side panel.
6. The improved water mattress defined in claim 4 wherein the float
tube means rings the inner periphery of the bag-like enclosure so a
portion thereof is adjacent and parallel to each of the side and
end panels thereof.
7. The improved water mattress defined in claim 1 wherein the
panels of the bag-like enclosure are formed from an elastomer
membrane.
8. The improved water mattress defined in claim 1 wherein the
diameter of the float tube means is less than two thirds the height
of its adjacent edge panel.
9. The improved water mattress defined in claim 3 wherein said
float tube means is hingedly connected centrally on the one edge
panel to allow movement thereof between the top and bottom
panels.
10. A waterbed frame having vertical side and end boards and joined
to form a rigid box-like frame in combination with a water
mattress, said water mattress comprising:
a rectangular water inflatable bag-like enclosure sized to fit
within the rigid box-like frame and having a top panel, a
spaced-apart bottom panel and vertical end and side panels
sealingly interconnecting said top and bottom panels to form a
water-tight bag-like structure, said vertical end and side panels
arranged to be supported respectively by said vertical end and side
boards;
a water filling and valve means located in one of said panels and
having fluid communication with the interior of said bag-like
enclosure;
at least one float tube means hingedly mounted internally at one
edge along one of said side panels, said float tube means forming
an internal fluid-tight chamber within said bag-like enclosure and
mounted to enable it to move vertically within said enclosure;
and
an air filling and valve means located in one of said panels and
having fluid communication with said fluid-tight internal chamber
whereby said float tube means can be pneumatically inflated to
provide edge support along the top of said one side panel through
its buoyancy when said bag-like enclosure is filled with water.
Description
BACKGROUND OF THE INVENTION
Waterbeds conventionally employing a frame and a water mattress
continue to gain public acceptance as restful sleeping structures.
Usually, they include a membrane fashioned to form a rectangular
bag-like enclosure which is inflated with water. The membrane is
usually a plastic or rubber sheet-like material and can be
generally described as a structure having spaced-apart, horizontal
top and bottom panels having their respective peripheral edges
sealingly connected by vertical side and end panels. A rectangular
frame having sufficient structural rigidity is employed to confine
the side and end panels of the mattress when it is water inflated
to prevent the hydrostatic pressures within the mattress from
bulging outward to a semi-circular configuration. This would
normally occur because the membrane forming the bag-like enclosure
lacks structural integrity to hold the mattress in a box-like
configuration without vertical supports for the end and side
panels, as well as the bottom panel, on which the weight of the
water is actually supported.
A water mattress, as described above, will comfortably support a
person lying prone thereon due to the relatively large surface area
over which the person's weight is distributed, however, if the
person's weight is concentrated or localized on small areas of the
mattress, it will tend to displace the water immediately
therebeneath, resulting in a major depression in the top surface of
the mattress. This can occur if a person stands or kneels or
otherwise positions his body on the mattress to localize his weight
on a relatively small surface area thereof. Often, such a condition
occurs as a person is getting onto or off of the top surface of a
water mattress, and it is in these situations that major
depressions adjacent to the contiguous rigid frame are troublesome
and often result in uncomfortable contact with the vertical support
boards of the frame.
Also, some discomfort with water mattresses is experienced when the
sleeper rolls too close to the edge or frame area, which again,
often results in a major depression in the area immediately
adjacent to the frame and often tends to wedge the person against
the frame in an uncomfortable manner.
In addition, due to the lack of structural integrity in the
membrane from which the mattress is constructed, its vertical side
and end panels tend to make rather large radii curved corners at
their intersections with the top panels rather than the more
conventional square corners of a foam or spring mattress.
Therefore, it is an object of the current invention to provide a
low-cost water mattress which overcomes the above problems, thereby
increasing its comfort and enhancing its utility as well as its
aesthetic appearance.
SUMMARY OF THE INVENTION
A waterbed or water mattress accomplishing the above objects as
well as providing other advantages includes a water-inflatable
rectangular enclosure formed of a membrane having a rectangular top
surface panel spaced above a parallel bottom rectangular surface
panel with its peripheral panel edges connected with side and end
panels to form a water-tight box-like enclosure, a water inflation
and closure aperture, a pneumatic float tube attached internally
within the box-like enclosure along and adjacent to at least one
side panel thereof and an air inflation tube communicating with
said pneumatic float tube so that the float tube will effect a
buoyant edge support along the at least one side panel thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
The instant invention will be better understood by referring to the
attached drawings wherein:
FIG. 1 is a perspective of the improved water mattress along with a
supporting frame having parts broken away to show the internal
detail of the mattress; and
FIG. 2 is a cross section of the improved mattress and supporting
frame structure shown in FIG. 1, better illustrating the internal
pneumatic float tube.
DESCRIPTION OF A PREFERRED EMBODIMENT
In reference to the perspective shown in FIG. 1, a waterbed is
illustrated having a frame 11 that supports a water-inflated
mattress 12. The frame includes a floor 13 supported on a base 14
that has vertical side boards 15 and end boards connected at their
ends to form an open box-like structure above the floor. Usually,
the frame is constructed of wood, as illustrated in the drawings,
with the side and end boards bolted or screwed to the floor 13, and
their corners joined to enhance the integrity of the frame
structure.
Within this box-like frame structure, now referred to as frame 11,
the water mattress 12 is contained. Basically, it is formed with a
rubber or plastic membrane from which the bag-like water enclosure
is fashioned. For the purposes of description, this bag-like
enclosure can be considered as having a horizontal rectangular top
panel 20 with a spaced-apart rectangular bottom panel arranged in
parallel relationship on the floor 13 of the frame 11, with side
panels 22 and end panels 23 connecting the peripheral edges of the
top and bottom panels to form the water-tight bag-like
enclosure.
In actual practice, the side and end panels, 22 and 23,
respectively, are usually formed by extending portions or flaps of
the top and bottom panels, 20 and 21 respectively, that are
connected by welding or glueing the ends of these extending
portions in the central area of the side and end panels, as
illustrated in FIGS. 1 and 2, to effect a continuous seam 25 about
the peripheral vertical sides and ends of the bag-like enclosure.
This is actually a preferred arrangement, as it eliminates numerous
other seams that otherwise might be necessary, and makes the
mattress less susceptible to leakages in the seam area. Further,
this single seam construction is particularly appropriate for
practicing the instant invention, as will be described
subsequently. Located in the top panel is a water filler plug
enclosure 24 through which the mattress is water-inflated. Such a
filler plug enclosure is conventional to most water mattresses.
Within the bag-like rectangular water enclosure described above,
are one or more air or pneumatic float tubes 30, as can be seen in
FIGS. 1 and 2. In the embodiment illustrated, a single rectangular
float tube "rings" the inner periphery of the bag-like enclosure
and forms a secondary chamber therein having a separate
air-inflation valve 31, so it can be inflated independently with
air before the water mattress or enclosure is completely inflated
with water. In an alternate structure, four separate float tubes 30
could be utilized, each having their own separate air inflation
valve 31. If this alternate structure is employed, the individual
float tube should extend substantially the full length of the
adjacent side panel 22 or end panel 23 along which it is
disposed.
In both embodiments, and as a matter of necessity in the alternate
embodiment, the float tube or tubes 30 are attached parallel and
closely adjacent to a side panel 22 or an end panel 23, as shown in
the drawings. By effecting such an attachment, which is
accomplished in the continuous seam 25 of the embodiment
illustrated in the drawings, the float tube or tubes are secured
contiguous or adjacent to an end or side panel, as the case may be,
so they can function properly.
Basically, the function of the float tube or tubes 30 is to provide
a buoyant edge support around the periphery of the top panel 20 of
the enclosure without substantial modification of mattress'
softness and comfort. This is accomplished by internal buoyant
tubes which are free to move vertically within the water-filled
bag-like enclosure in response to highly localized loading along
the edges of the top panel 20. It can be appreciated that the float
tube or tubes actually are air chambers which are buoyant in the
surrounding water and also have a length at least substantially
equivalent to the adjacent side or end panel. As a result, highly
localized loading will, to some extent, be transmitted axially
along the tube, thereby increasing the weight distribution that is
localized in any point thereof. Since the buoyancy factor is
appreciable, a firm gentle support is provided by the float tube or
tubes. In addition, the buoyancy of the float tube or tubes tends
to square the top edges of the bag-like enclosure by providing a
lift at point A, which makes the current water mattress more
appealing aesthetically when compared to a more conventional foam
or spring mattress.
In practice, these water mattresses have a thickness of T, which
varys from 6 to 12 inches. Therefore, the float tube or tubes 30
should be designed to have an inflated diameter D approximating
one-half to two-thirds the thickness T of the water mattress.
FIG. 2 best illustrates a practical application of the float tube
30, where a girl is shown perched on a top edge of the improved
water mattress. It can be seen that the girl's weight is localized
over the float tube 30 and the outermost edge of the mattress is
being supported at a height approximately equal to the height of
the side board 15, making it easier for her to leave the surface of
the mattress. Normally, the float tube will not "bottom out"
against the bottom panel 21 due to its length and buoyancy. In
fact, a person can adjust the edge support to suit his whims by
merely adjusting the degree of inflation (below its maximum
inflation diameter) to achieve the best personal compromise between
softness and edge support. Also, it can be appreciated that a
vertical air chamber extending between the top and bottom would not
be equivalent to the float tube, as it cannot function in the
manner described above, as the float tube moves independently of
the adjacent or contiguous elastomer membrane surfaces of the side
and/or top panels.
The float tube or tubes 30 can be constructed of the same flexible
elastomer membrane from which the panels of the bag-like enclosure
are formed. In particular, sheets of polyvinyl chloride are
especially suitable for forming both the bag-like enclosure and
float tube or tubes 30. In fact, when constructed in accordance
with the structure shown in the drawings, the float tube or tubes
and enclosure can all be formed with a single common seam,
facilitating the economic manufacture of the improved water
mattress.
* * * * *