U.S. patent number 3,877,092 [Application Number 05/466,124] was granted by the patent office on 1975-04-15 for self inflatable air mattress, and sleeping bag with air pressure control.
This patent grant is currently assigned to Gaiser Enterprises, Inc.. Invention is credited to Conrad J. Gaiser.
United States Patent |
3,877,092 |
Gaiser |
April 15, 1975 |
SELF INFLATABLE AIR MATTRESS, AND SLEEPING BAG WITH AIR PRESSURE
CONTROL
Abstract
A self inflatable air mattress having a core of flexible and
resilient cellular material of the open cell type, and an air tight
flexible jacket enclosing the core. A tube communicating with the
interior of the jacket allows flow of air into and from the core
cells; and a closure for the tube maintains the cells filled to
form a resilient air cushion. A mandrel adjacent an end of the
mattress enables it to be flattened and readily wound into a
compact roll. Detachable connecting means on the mattress jacket
provides means for fixing the mandrel in a partially rolled
position to maintain increased pressure. A cover attached to the
jacket provides a sleeping bag.
Inventors: |
Gaiser; Conrad J. (Zephyr Cove,
NV) |
Assignee: |
Gaiser Enterprises, Inc.
(Zephyr Cove, NV)
|
Family
ID: |
23850583 |
Appl.
No.: |
05/466,124 |
Filed: |
May 2, 1974 |
Current U.S.
Class: |
5/413R; 5/709;
5/714 |
Current CPC
Class: |
A47C
27/084 (20130101); A47C 27/18 (20130101); A47G
9/086 (20130101); A47G 2009/003 (20130101) |
Current International
Class: |
A47C
27/14 (20060101); A47C 27/18 (20060101); A47G
9/08 (20060101); A47G 9/00 (20060101); A47g
009/00 (); A47c 023/00 () |
Field of
Search: |
;5/343,344,347,348-350,355 ;9/11A,11,13,2A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gilliam; Paul R.
Assistant Examiner: Calvert; Andrew M.
Attorney, Agent or Firm: Bialos; Stanley
Claims
I claim:
1. A self inflatable air mattress comprising a core of flexible and
resilient cellular material of the open cell type allowing free
passage of air therethrough, a substantially air tight flexible
jacket enclosing said core, a tube communicating with the interior
of said jacket from exteriorally thereof for flow of air into and
from the cells of said core, and an openable and reclosable closure
for said tube which in its closed condition with the cells filled
with air prevents escape of air from said cells and maintains them
filled with air to provide a resilient air cushion, and which when
open and the mattress placed under compression allows escape of air
from said cells and flattening of said mattress, said mattress
having a mandrel about which it can be wound into a roll to
compress the same and thus expel air from said tube and flatten the
mattress when said closure is open, said mandrel when rolled with
said tube closure closed expelling air from the core cells adjacent
said mandrel while increasing pressure in the remaining cells above
atmospheric pressure, and detachable connecting members on said
mattress jacket to hold said mandrel in a substantially fixed
adjusted position to maintain increased pressure with said tube
closure closed.
2. The mattress of claim 1 wherein said detachable connecting
members comprise flexible ties, one of which is attached at one end
thereof to the top face of the jacket and another at one end
thereof to the bottom face of said jacket, said ties holding the
mandrel in said substantially fixed adjusted position when tied
together.
3. The mattress of claim 2 wherein a pair of said flexible ties is
provided adjacent each side edge of the mattress.
4. The mattress of claim 2 wherein the tie attached to said bottom
face is of a length sufficient to extend over the mandrel end of
the jacket and over the top face thereof.
5. A sleeping bag comprising a self inflatable air mattress having
a core flexible and resilient cellular material of the open cell
type allowing free passage of air therethrough, a substantially air
tight flexible jacket enclosing said core and adhesively bonded
thereto, a tube communicating with the interior of the jacket from
exteriorally thereof for flow of air into and from the cells of
said core, a manually removable cap for said tube whereby air can
fill the core cells when the cap is removed and upon closing of
said cap maintain the cells filled to provide a resilient air
cushion, a cover overlying said jacket and attached thereto
adjacent one end and opposite sides thereof, said cover having
adjacent portions provided with an openable and reclosable closure
to enable opening and closing of the cover, and said sleeping bag
having adjacent an end thereof a mandrel about which the bag can be
wound into a roll, said mandrel when being rolled with said tube
closure closed expelling air from the core cells adjacent said
mandrel while increasing pressure in the remaining cells above
atmospheric pressure, and detachable connecting ties on said
mattress jacket to hold said mandrel in a substantially fixed
adjusted position to maintain increased pressure with said tube
closure closed, one of said ties being attached to the top face of
said mattress jacket at one end thereof, the attachment of said
cover adjacent said one end of the jacket being to the bottom face
of the jacket at a position ahead of said mandrel, and another of
said ties being attached to the bottom face of the jacket between
said mandrel and the location of attachment of the cover to said
bottom face whereby the mandrel can be rolled up toward such
location of attachment of said cover to said bottom face without
interference from said cover.
6. The mattress of claim 5 wherein the tie attached to said bottom
face of the jacket is of a length sufficient to extend over the
mandrel end of the jacket and over the top face thereof.
7. The mattress of claim 5 wherein a pair of said flexible ties is
provided adjacent each side edge of the mattress.
8. The method of adjusting pressure in a self inflatable air
mattress of the type comprising a core of flexible and resilient
cellular material of the open cell type allowing free passage of
air therethrough, a substantially air tight flexible jacket
enclosing said core, a tube communicating with the interior of said
jacket from exteriorally thereof for flow of air into and from the
cells of said core, and an openable and reclosable closure for said
tube which in its closed condition with the cells filled with air
prevents escape of air from said cells and maintains them filled
with air to provide a resilient air cushion, and which when open
and the mattress placed under compression allows escape of air from
said cells and flattening of said mattress; said method comprising
providing a mandrel adjacent an end of the mattress, when said
mattress is inflated at atmospheric pressure and said closure for
said tube is closed, rolling the mandrel to expel air from the core
cells adjacent the mandrel to thereby increase pressure in the
remaining cells above atmospheric pressure, and providing means to
hold the mandrel in a substantially fixed adjusted position.
Description
BACKGROUND OF THE INVENTION
This invention relates to a self inflatable air mattress, and
sleeping bag of the type disclosed and claimed in applicant's U.S.
Pat. No. 3,798,686, dated Mar. 26, 1974. In such structure, a core
of flexible and resilient cellular material of the open cell type
allows free passage of air therethrough, and is enclosed within a
substantially air tight flexible jacket. A tube communicating with
the interior of the jacket provides for flow of air into and from
the cells of the core. The tube is openable and reclosable by a
closure which in the closed position and with the cells filled with
air prevents escape of air from the cells to provide a resilient
air cushion.
When the closure is open and the mattress placed under compression,
air escapes from the cells resulting in flattening of the mattress
when it is wound into a roll. To facilitate rolling of the mattress
to compress the same, a mandrel is provided adjacent one end
thereof about which the mattress can be wound. A cover may be
provided on the mattress, which is openable and reclosable by
detachable connecting means, such as a slide fastener, to provide a
sleeping bag.
SUMMARY AND OBJECTS OF THE INVENTION
In the invention hereof, the same type of mattress and sleeping bag
structure is provided with the improvement of detachable connecting
members on the mattress jacket to hold the mandrel in a
substantially fixed adjusted position when the mandrel has been
partially rolled, to maintain increased pressure in the mattress.
Advantageously, the detachable connecting members for holding the
mandrel in an adjusted position are flexible ties (such as tapes or
cords), one of which is attached at one end to the top face of the
jacket and another at one end to the bottom face of the jacket.
They hold the mandrel in such substantially fixed rolled position
when tied together.
From the preceding, it is seen that the invention has as its
objects, among others, the provision of an improved air mattress,
and sleeping bag which is self inflatable and in which pressure
above atmospheric pressure when so desired can be readily obtained
by adjustment of the position of a mandrel upon which the mattress
can be rolled, and which are of simple and economical construction,
and the provision of a method of obtaining and maintaining
increased pressure above atmospheric in a self inflatable air
mattress.
Other objects will become apparent from the following more detailed
description and accompanying drawings, in which:
DESCRIPTION OF THE DRAWINGS
FIG. 1 is an isometric view of the mattress provided with
detachable connecting members adjacent one end thereof; a corner
portion of the structure being shown broken away to illustrate the
construction;
FIGS. 1A through 1D are similar isometric views illustrating how
the mattress can be rolled about the mandrel adjacent one end
thereof to provide various stages of increased pressure above
atmospheric;
FIG. 2 is an isometric view of the air mattress of FIG. 1 in
combination with a sleeping bag cover and with the mandrel in an
adjusted rolled position fixed by the detachable connecting
members; portions of the structure being shown broken away to
illustrate the construction;
FIG. 3 is an end view looking in the direction of arrow 3 in FIG. 2
with the sleeping bag closed;
FIG. 4 is a longitudinal vertical section of a sleeping bag of the
type of construction disclosed in applicant's aforementioned
patent, in combination with detachable connecting members for
holding the mandrel in a fixed position when desired; and
FIG. 5 is a fragmentary bottom view of FIG. 4.
DETAILED DESCRIPTION
Referring to FIGS. 1, 2 and 3, mattress M comprises core 2 of
resilient flexible cellular material of the open cell type which
allows free passage of air therethrough because in such material
all the cells of the material are in intercommunication. Adjacent
one end thereof the core has imbedded therein a mandrel 3,
desirably a hollow tube of suitable plastic material but which may
be of any other material, such as metal. Mandrel 3 is desirably
hollow to save weight although it may be a solid. A suitable
material for core 2 is of the character disclosed in applicant's
aforementioned U.S. Pat. No. 3,798,686, namely an elastomeric
material such as polyurethane or polyether foam. Lightweight
material having a density in the range of about 0.8 to 1.5 pound
per cubic foot is preferable. A desirable foam product is a
polyether foam, AP22/24 manufactured by Expanded Rubber &
Plastic Corp. of Gardena, Calif.
Core 2 is enclosed within an air tight jacket 4 of flexible
material. Any suitable material may be employed for such purpose,
such as nylon of the non-rip type or relatively thick polyethlene
film desirably about 4 mils. in thickness. Other suitable material
for the jacket are impervious rubberized fabrics and saran type
films. Jacket 4 fits tightly about core 2 and may be adhesively
bonded to the core at substantially all areas of contact therewith
although this is not necessary as long as the jacket and core fit
relatively close and the jacket is of air tight material so as to
retain air therein.
At the end opposite the core end, a valve tube 6 extends through an
aperture in the jacket so as to communicate with the interior of
the jacket from exteriorally thereof whereby air may flow into and
from the core cells. Tube 6, as is shown in FIG. 4 which discloses
a lattice type cellular core shown in the aforementioned patent, is
provided with an inner flange 7 adhesively bonded by any suitable
adhesive in sealed relationship to an end portion of the core and
to the portion of the jacket 4 overlying an end of the core. A
suitable adhesive for such bonding may be those of the latex type,
epoxy resin cements or polyester resins.
A closure cap 8 is removably mounted on the exterior end of valve
tube 6 by a threaded connection, and can thus be readily closed
manually on the tube, or removed therefrom after being closed. When
cap 8 is opened, atmospheric air can readily flow through valve
tube 6 and quickly fill all the voids of the core; and after the
cap is screwed onto the tube to close the same, air cannot escape
through air tight jacket 4 from the core cells, thus providing a
resilient air cushion. By the same token when the mattress is wound
into a roll about mandrel 3 at one end of the mattress, which is
opposite valve tube 6, air within the core cells will be expelled
under compression resulting from the rolling. After the air is thus
expelled and the cap is again closed, the mattress will be
flattened because of collapse of the cells. It is advantageous that
tube 6 have a relatively wide mouth to allow rapid ingress and
egress of air; a suitable size being about three-fourths of an inch
diameter.
From the preceding it is seen that when the mattress is flat and
tube 6 is opened to the atmosphere, and then closed by closure cap
8 the pressure within the cells of core 2 will be at atmospheric
pressure. This provides substantial resiliency and cushioning
effect. For the purpose of increasing pressure above atmospheric
and thereby enhancing resiliency, means is provided by the
provision of connecting members on the jacket adjacent its end
portion at mandrel 3, to hold the mandrel when it is partially
rolled in an adjusted position. When the mandrel is thus partially
rolled after valve tube 6 has been closed, and as is depicted in
FIGS. 1A through 1D, air is expelled from the core cells adjacent
the mandrel thus increasing pressure in the remaining cells above
atmospheric pressure.
The increase in pressure is a function of the extent the mandrel is
rolled. In other words, the further the mandrel is rolled the more
the pressure will be increased between the mandrel and the opposite
end of the mattress adjacent tube 6. In this connection, only a
fraction of a complete turn of the mandrel will result in
significant pressure increase, and consequently enhanced cushioning
effect.
Any suitable connecting means on the mattress may be provided for
holding the mandrel in an adjusted position according to the desire
of the user of the mattress. Such means comprises a lower flexible
strap 9 and an upper flexible strap 11 connected to the mattress
adjacent one side edge thereof. Straps 9 and 11 are desirably of
the same type of material as the jacket but may be of leather or
any other suitable flexible material. They are attached at their
inner ends by a suitable adhesive such as the aforementioned latex
type, epoxy resin cements or polyester resins, or by stitching, to
the bottom face and the top face, respectively, of the jacket.
Lower tie member is of a length sufficient to extend over the
mandrel end of the jacket and over the top thereof, and is longer
than upper strap 11 so that when the mandrel is partially rolled,
straps 9 and 11 may be tied together as shown in FIGS. 1A through
1D, to hold the mandrel in a desired adjusted position. Desirably a
pair of such straps is provided adjacent each side edge of the
mattress.
It will be noted that both straps 9 and 11 have their locations of
attachment to the jacket in front or ahead of mandrel 3. This
enables partial rolling of the mandrel end of the jacket without
interfering with the straps. FIG. 1A through 1D illustrate various
partially rolled positions of the mandrel end of the jacket after
the mandrel end has been tied at an adjusted position. Each
successive FIG. illustrates an increased stage of the rolling with
consequent increased pressure in the mattress.
FIGS. 2 and 3 illustrate the mattress of FIG. 1 with an openable
and reclosable cover 12 which provides a sleeping bag. The cover is
fastened along its sides by a suitable adhesive, in the manner
disclosed in the aforementioned U.S. Pat. No. 3,798,686, to
portions of the side edges of the mattress jacket 4. It is made of
two half-sections as in the patent, which can overlap in the
unoccupied condition of the bag to thus provide room for an
occupant when the bag is used. The two cover sections may be
detachably connected by a slide fastener 13.
In addition to being attached to side edge portions of the mattress
it will be noted from FIG. 2, and FIG. 4 illustrating a lattice
type mattress, that the bottom of the cover extends partially over
the bottom face of the mattress and is attached to such bottom face
at a position ahead of the location of attachment of bottom straps
9, and that the slide fastener 13 extends over the mandrel end of
the jacket and over the bottom. Also, the sides of the cover are
preferably unattached to the side edges of mattress at a location
between the mandrel end and the location at which bottom straps 9
are attached. This enables cover 12 to be freely opened at the
mandrel end of the mattress to allow partial rolling of the mandrel
for the purpose described, without interference from the sleeping
bag cover.
The FIG. 4 embodiment is essentially the same as that of FIG. 2
except that a lattice type mattress disclosed in the aforementioned
patent is shown, instead of a unitary or solid mass of the mattress
material. Such lattice type comprises upper and lower pads 14 of
the cellular material, and cross members 16 and 17 which form the
lattice structure. Otherwise, the aforedescribed arrangement of
sleeping bag cover 12, mandrel 3, slide fastener 13 and upper and
lower straps 9 and 11, respectively, remain the same.
* * * * *