U.S. patent number 3,784,994 [Application Number 05/309,734] was granted by the patent office on 1974-01-15 for air bed.
Invention is credited to Edmund Kery.
United States Patent |
3,784,994 |
Kery |
January 15, 1974 |
AIR BED
Abstract
An air bed comprising an air spring unit disposed on a support
platform and comprising a plurality of parallel, uniformly spaced
and vertically aligned inflatable bellows having closed tops and
open ends, the tops interlocked and the ends fixed through the
platform, and an elastic expandable member coupled to the open end
of each bellows and disposed within an expansion-limiting frame. An
air tube is coupled to each elastic member and leads into an
enclosed distributor by engagement with a valve mounted
therethrough. Inflation of the combined bellows and elastic member
is effected by air pumped from a compressor having an air line
leading into the distributor. Closing and opening of the valves is
effected by a table within the distributor selectively moveable
against the valve release pins.
Inventors: |
Kery; Edmund (New York,
NY) |
Family
ID: |
23199447 |
Appl.
No.: |
05/309,734 |
Filed: |
November 27, 1972 |
Current U.S.
Class: |
5/710; 5/401;
297/284.1 |
Current CPC
Class: |
A47C
23/002 (20130101); A47C 27/063 (20130101); A47C
27/082 (20130101) |
Current International
Class: |
A47C
27/04 (20060101); A47C 27/08 (20060101); A47C
27/06 (20060101); A47c 027/08 () |
Field of
Search: |
;5/348,349,350,351,DIG.2
;297/DIG.8,DIG.3,284 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Zugel; Francis K.
Assistant Examiner: Calvert; Andrew M.
Attorney, Agent or Firm: Schlessel; Sydney B.
Claims
Having described my invention, I claim:
1. An air bed comprising a support framework provided with an
horizontal platform and an air spring unit disposed thereon and
comprising a plurality of bellows-shaped inflatable members
constituting air springs having flat closed tops and open bottoms,
the air springs disposed in parallel, spaced, vertical alignment,
with their top surfaces interlocked and their open bottoms fixedly
disposed through apertures formed in the platform, an elastic
expandable member coupled to the open bottom of each air spring and
providing intercommunication therewith, a rigid enclosure member
disposed around each elastic member and adapted to limit its
expansion, an air tube coupled to each elastic member, means to
inflate the combined air springs and elastic members, means to
indicate the air pressure therein, means to selectively open and
close the air tubes, means to adjust the air pressure and means to
exhaust the air from the combined air springs and elastic
members.
2. An air bed as described in claim 1, the air spring unit being
further provided with a layer of soft material disposed across the
top surfaces of the air springs and a casing enclosing the layer of
soft material and the air springs.
3. An air bed as described in claim 2, the means to inflate the
combined air springs and elastic members comprising a distributor
including a housing sealed by a closure member, a plurality of
valves mounted through the closure member and opening outwardly
therefrom and having their release pins disposed in alignment
within the housing, one of the air tubes coupled to the exposed end
of each of the valves, and a compressor provided with an air line
leading into the distributor.
4. An air bed as described in claim 3, the means to register the
air pressure within the combined air springs and elastic members
comprising a manometer mounted on the outer surface of the
distributor and in communication with the interior thereof.
5. An air bed as decribed in claim 4, the means to selectively open
and close the air tubes comprising a plurality of rods fixed in the
floor of the distributor housing and extending into the closure
member, a table reciprocally mounted on the rods and a shaft
journeled through the housing below the table and provided with
eccentric cams abutting the table undersurface, whereby rotation of
the shaft alternately raises the table to depress the valve pins
and lowers the table to release the valve pins, one end of the
shaft extending from the distributor and terminating in a knob for
manual rotation of the shaft.
6. An air bed as described in claim 5, a spring mounted around each
of the rods between the table and the closure member and adapted to
tension the table against the closure member.
7. An air bed as described in claim 6, the means to exhaust the air
from the combined air springs and elastic members and to adjust the
air pressure comprising an exhaust valve disposed through the end
wall of the distributor and in communication with the interior
thereof.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to beds and bedding and has for its
objective the provision of an air bed whose resiliency to support a
human body in scientific comfort in repose is provided for by a
support member encompassing a plurality of spaced,
vertically-aligned, independent air springs, or air-inflated
bellows, disposed therein beneath a soft protective layer of
material and maintained with a constant air content, each air
spring coupled to an elastic member, whereby bodily weight applied
to the support member not only causes temporary compression of each
air spring, in accordance with the amount of weight borne by it,
but allows some of the contained air to pass into and inflate the
elastic attached member within designated limits, thereby to
provide greater and more uniform adaptability of the support member
to the contours of the human body, the support member returning to
its original shape with the removal of the imposed weight.
2. Prior Art
In the prior state of the art there have been provided various
forms of air cushions and mattresses. Some of these devices provide
for their inflation with air as a single unit, so that when
pressure is applied to one area of the cushion or mattress air is
displaced to areas not subjected to pressure, thereby making them
bulky, misshaped and wobbly, contributing very little to comfort.
In other forms the cushions and mattresses are subdivided into
partitioned areas, with each partitioned area individually filled
with air. When pressures are applied to any specific partitioned
area or areas, resiliency is limited to compression of the
contained air, since the latter is confined to the limits of its
enclosure. In further forms of the present art air mattresses or
supports are provided with individually, air-filled bellows
disposed across the area of the mattress, so that depression of
specific bellows is encompassed by the degree of pressure applied
to each. In these forms, however, resiliency is restricted to the
extent to which the entrapped air is capable of compression, with
no provision for temporary escape of a part of the contained air
from its bellows, so that the greater the pressure applied, the
greater the resistance to such pressure.
BRIEF SUMMARY OF THE INVENTION
The aforementioned disadvantages are overcome by my invention,
which provides for an air bed including a support member in which a
plurality of spaced air springs or bellows are supported in
vertical alignment below a protective layer of material, with each
air spring in communication with an elastic and inflatable member
and individually filled with air to a pre-selected, uniform
pressure. When filled with air to the desired pressure the volume
of air contained in each air spring and communicating elastic
member remains constant, regardless of pressure or compression.
When pressure is applied, as by a reclining body, to the support
member the air springs will compress independently, in accordance
with the degree of weight or pressure applied, thereby to fit the
contours of the reclining body, with the air contained in each air
spring not only compressing to a specific degree, but also relieved
by the escape of some of the air into the elastic, inflatable
member, and thereby providing a higher degree of resiliency and
buoyancy to the entire bed, with the extent of inflation of the
elastic member limited by a restrictive member. With the release of
the pressure applied to the bed, as by removal of its occupant, the
elastic members will constrict to original size, returning the
displaced air to the respective air springs and thereby restoring
them to their original size and shape. As is obvious, shifting of
the body on the bed will cause some of the air springs to compress
further and some to expand, depending on the shift of weight, so
that the support member continues to follow the body contours.
Compressor means is provided to inflate the air springs to deisred
pressure and means to deflate them, as well as to regulate the
firmness of the support member, or its softness, depending on the
individual taste of the user.
It is therefore the principal object of my invention to provide an
air bed wherein the resiliency and buoyancy of the bed is
adjustable to any desired degree of firmness or softness.
A second important object of my invention lies in the provision of
an air bed wherein application of bodily weight will cause
temporary displacement of the contained air, as well as
compression.
A third important object of my invention lies in the provision of
an air bed wherein depression of specific areas thereof is
accomplished by the extent of weight disposed, thereby conforming
the bed to the contours of the reclining body.
A fourth important object of my invention will be found in the
provision of an air bed wherein shifting of bodily weight will
cause appropriate adjustment of the air springs.
A fifth important object of my invention lies in providing an air
bed whose firmness can be quickly and easily adjusted to individual
taste of the user.
Still another important object of my invention lies in the
provision of an air bed composed of individual units which can be
separately replaced where required.
These and other salient objects, advantages and functional features
of my invention, together with the novel features of construction,
composition and arrangement of parts, will become more readily
apparent from an examination of the following description, taken
with the accompanying drawings, wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a preferred embodiment of my
invention;
FIG. 2 is a top plan view of the embodiment of FIG. 1, partly
broken away, to show disposition of the air springs;
FIG. 3 is a cross-sectional view, taken on lines 3--3 of FIG.
2;
FIG. 4 is an enlarged cross-sectional view showing one of the air
springs in normal expansion, partly broken away;
FIG. 5 is a view similar to FIG. 4, showing compression of the air
spring;
FIG. 6 is a cross-sectional view, taken on lines 6--6 of FIG.
4;
FIG. 7 is an enlarged top view, partly in section, of the
distributor;
FIG. 8 is an enlarged exploded view of the distributor of FIG.
7;
FIG. 9 is a cross-sectional view of the distributor of FIGS. 7 and
8; and
FIG. 10 is a cross-sectional view, taken on lines 10--10 of FIG.
9.
Similar reference characters designate similar parts throughout the
different views.
DETAILED DESCRIPTION OF THE INVENTION
Illustrative of the embodiment shown in the drawings, my air bed 10
comprises a support frame 12, formed with side walls 14 and end
walls 16, and provided with a platform 18 fitted into grooves in
the walls 14 and 16 and adapted to support the air spring unit 20.
Disposed adajcent the head portion of the bed 10 there is provided
an enclosed headboard housing 22 having a recessed front wall
section 24, adapted to accomodate the end wall 16 of the frame 12,
so as to bring the rear end of the air spring unit 20 into close
abutment with the unrecessed front wall 26. The top surface 28 of
the headboard housing 22 is inclined, as shown, and is provided
with an opening to seat a control panel 30, by means of which the
air bed 10 may be inflated and deflated, as will be hereinafter
described. The surface 28 may also provided other openings or
support for appliances, such as a lamp or radio(neither shown).
Referring now to FIGS. 2-6, the air spring unit 20 contains a
plurality of uniformly sapced air springs 32 vertically disposed in
parallel relationship throughout the unit 20, as shown. Each air
spring 32 is preferably, but not necessarily, composed of a heavy
gauge plastic material, molded in the shape of a collapsible
bellows, suitably creased, as shown, and adapted to compress with
the application of pressure on its top surface 34, so that its
enlarged areas converge, as is seen in FIG. 5. The angular sides of
the air springs 32 may be provided with stiffener elements 33, if
desired, to give them greater rigidity under pressure, as shown in
FIGS. 4 and 5. Each air spring 32 is provided with a closed flat
top surface 34, on which is mounted a steel ring 36 locked in place
by support rings 38 and 40, the ring 36 being provided with four
spaced arcuate slots 42 around its outer perimeter, by which the
top of each air spring 32 is secured in position with respect to
adjoining air springs 32, in tensioned spaced relationship, by tie
members 44 whose converging ends are secured together by central
tie rings 46, as shown in FIG. 2.
The bottom end of each air spring is enlarged to form a pedestal 48
extending into a reduced circular flange 50 adapted to extend
through a circular aperture 52 in the frame platform 18, with the
lower surface 54 of the pedestal 48 abutting and resting upon the
upper surface of the platform 18, whereby each air spring 32 is
thus supported in a fixed, vertical position. Each air spring 32 is
thus disposed so that air can be introduced thereinto through the
flange 50. An elastic inflatable ball 56 is secured to the air
spring 32 by the engagement of its enlarged neck 58 around the
flange 50, secured thereto by a locking ring 60, the ball 56 being
reinforced around its outer area by a network 62 of elastic
stiffener bands, as shown in FIGS. 4 and 5. The end of the ball 56,
opposite its neck 58 is provided with an opening 64 to which is
coupled the end of an air tube 66, through which air is introduced
into the combined air spring 32 and ball 56, as will hereinafter be
described. Expansion of the ball 56 is limited by the circumference
of a rigid basket element 68, in which the ball 56 is disposed, the
basket element 68 being secured to sapced ribs 70 extending from
the undersurface of the platform 18, as by screws 72 threaded into
the ribs 70 through a support member 74 formed integral with the
basket element 68.
The air spring unit 20 is provided with a suitable support layer
76, composed of foam rubber topped by cotton or wool, or other
similar materials, as is well known in the art, which is disposed
across the tops of the air springs 32, the entire unit 20 including
a casing 78 fitted around the layer 76 and air springs 32, the
bottom surface of the casing 78 provided with apertures 80 through
which the pedestal flanges 50 extend below the platform 18, the
upper surface of the casing 78 being tufted, as shown in FIG.
1.
Coming now to FIG. 3, the air tubes 66, one of which is coupled to
each ball 56, extend through the frame 12, passing through an
opening 82 in wall 16 and an opening 84 in the headboard housing
22, wherein each air tube 66 is coupled to a valve 86 disposed
through the top of a distributor 88, which is mounted to the
undersurface 90 of the inclined surface 28 of the headboard housing
22, as shown, the end of the distributor 88 thereby forming the
panel 30 exposed through the opening in the surface 28 heretofore
described, and the valves 86 providing communication between the
air tubes 66 and the interior of the distributor 88. The air tubes
66 pass through, and are supported by, rings(not shown) secured in
the bottom surfaces of the ribs 70. A compressor 92 is secured to
the floor of the headboard housing 22, as by bolts(not shown) and
is provided with an air line 94 leading into the interior of the
distributor 88, and is connected to a suitable source of electric
current(not shown), with its activating wires terminating in a
switch 130 mounted on the control panel 30.
Referring now to FIGS. 7-10, the distributor 88 comprises a housing
96 provided with a closure member 98, the latter containing the air
valves 86 whose locking pins 100 extend into the housing 96, and
the closure member 98 is secured in air-tight engagement with the
housing 96 by screws 102 threaded through extensions 104 of the
closure member 98 into extensions 106 of the housing 96, a gasket
108 being disposed thereinbetween.
The distributor 88 contains a footed table 110 provided with bores
112 extending through its feet 114, and is thereby adapted to seat
around corresponding rods 116 fitted in the floor of the housing 96
and extending into the closure member 98, whereby the table 110 is
adapted to be raised and lowered within the housing 96, in raised
position to depress the valve pins 100 to open the valves 86, and
in lowered position to release the pins 100, thereby closing the
valves 86. Raising and lowering of the table 110 is effected by
means of a shaft 118 rotatively journeled through the end walls of
the housing 96 below the table 110, and provided with a pair of
eccentric cams 120 disposed in abutment with the undersurface of
the table 110, the shaft 118 extending through an end wall of the
housing 96 to be exposed through the control panel 30, and
terminating in a knob 122 fitted with and indicator symbor 124 to
show the position of the table 110 within the distributor 88, the
knob 122 constituting means for rotation of the shaft 118. Tension
springs 117 are mounted around the rods 116 between the table 110
and the closure member 98 to force the table 110 away from the
valve pins 100 when the shaft 118 is rotated to lower the table
110.
The distributor is further provided with an exhaust valve 126
fitted through its end wall, and a monometer 128, both in
communication with the interior of the distributor 86, the valve
126, manometer 128, knob 122 and switch 130 being all mounted in
the end wall of the distributor 88 forming its control panel
30.
OPERATION OF THE INVENTION
My air bed 10 is inflated for use, through operation of the control
panel, as follows: switch 130 is thrown to activate the compressor
92 and force air therefrom through its air line 94 into the
distributor 88. Knob 122 is then turned to raise the table 110 to
depress the valve pins 100, whereby the air is uniformly forced
through the air tubes 66 into the combined air springs 32 and
elastic balls 56, the operator meanwhile noting the air pressure on
the manometer 128. When the air springs 32 and balls 56 have been
inflated to the desired air pressure, as indicated on the manometer
128, the knob 122 is rotated to its original position, releasing
the valve pins 100 from the table 100, the closing off all of the
valves 86, the compressor 92 is then deactivated. After testing the
bed 10 for firmness, if the bed 10 is considered toosoft for
comfort, the above procedure is repeated to increase the air
pressure. On the other hand, should the bed 10 be considered too
hard or firm for comfort, the air pressure can be selectively
reduced by rotating the knob 122 to open the valves 86, and
depressing the exhaust valve 126 to exhaust air from the air
springs 32 and balls 56 as it passes back into the distributor 88,
until the pressure descends to the desired reduction. In this
manner the firmness or softness of the bed 10 can be adjusted
quickly and easily, to any degree desired.
In the event that any part of the air bed 10 malfunctions, such as,
for example, an air spring 32, elastic ball 56, or air tube 66, the
part is easily and quickly replaceable with a new part, as is
obvious from the disclosed construction.
It is further to be noted that the embodiment shown and described
is by way of illustration and not of limitation, and that various
changes may be made in the construction, composition and
arrangement of parts without limitation upon or departure from the
spirit and scope of the invention, or sacrificing any of the
advantages thereof inherent therein, all of which are claimed.
* * * * *