U.S. patent number 3,782,362 [Application Number 05/148,408] was granted by the patent office on 1974-01-01 for baby incubator.
Invention is credited to Eugene T. Puzio.
United States Patent |
3,782,362 |
Puzio |
January 1, 1974 |
BABY INCUBATOR
Abstract
Baby incubators are provided with wall forming members
projecting upward about the sides of a support for an infant and
conditioned air is circulated over the inner surfaces of the walls
in a manner to prevent loss of heat from the patient to the walls
or ambient air. The construction in its preferred embodiments
includes wall forming members movable to either opened or closed
positions whereby access to the patient is afforded while the
preservation of a protective environment is assured.
Inventors: |
Puzio; Eugene T. (Trenton,
NJ) |
Family
ID: |
22525646 |
Appl.
No.: |
05/148,408 |
Filed: |
June 1, 1971 |
Current U.S.
Class: |
600/22;
128/205.26 |
Current CPC
Class: |
A61G
11/007 (20130101); A61G 11/00 (20130101); A61G
11/006 (20130101) |
Current International
Class: |
A61G
11/00 (20060101); A61g 011/00 () |
Field of
Search: |
;128/1B,191,191A
;98/36,115LH |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
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|
|
813,872 |
|
Nov 1936 |
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FR |
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958,348 |
|
Nov 1947 |
|
FR |
|
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Dunne; G. F.
Attorney, Agent or Firm: Sperry and Zoda
Claims
I claim:
1. A baby incubator comprising a base, an infant support on said
base, wall forming members located adjacent the sides of said base
and support and spaced from the edges of said support, means for
mounting said wall forming members for vertical movement with
respect to said base and support from a raised position in which
they extend upward about the sides of said support to a lowered
position affording access to said support from the sides thereof,
means for directing conditioned air upward through the space
between said support and wall forming members and over the inner
surface of at least one of said wall forming members while said
members are in said raised position, and means carried by said wall
forming members for deflecting such air inward over said support
when said members are in said lowered position.
2. A baby incubator as defined in claim 1 wherein a cover extends
over said support in a position to cooperate with said wall forming
members when said members are in said raised position to provide an
enclosure for said infant support.
3. A baby incubator comprising a base, an infant support on said
base, wall forming members connected together to form a unit
surrounding said base and support, means for mounting said unit for
vertical telescoping movement with respect to the base and support
from a raised position in which the upper edges of said wall
forming members project upward a substantial distance above said
support to a lowered position in which the upper edges of said wall
forming members are positioned adjacent said support, at least a
portion of said wall forming members being spaced from said
support, and means for circulating conditioned air upward through
said space, over the inner surfaces of said wall forming members
and over said infant support.
4. A baby incubator as defined in claim 3 wherein said support is
substantially rectangular and said wall forming members extend
vertically adjacent the sides of said support, at least one of said
wall forming members being transparent.
5. A baby incubator as defined in claim 3 wherein means are
provided for directing heated air upward adjacent the inner
surfaces of said wall forming members.
6. A baby incubator as defined in claim 3 wherein at least some of
said wall forming members are provided with inwardly inclined air
deflecting means located adjacent the upper edges thereof.
7. A baby incubator comprising a base, an infant support on said
base, wall forming members connected together as a unit extending
about the sides of said support and spaced therefrom, means for
mounting said unit for vertical movement into and out of a raised
position in which they extend upwardly about the sides of said
support, a cover extending over said support and spaced vertically
therefrom, a column extending upward adjacent one of said wall
forming members, said cover being mounted on said column and
positioned to cooperate with said wall forming members to form an
enclosure extending about and over said support when said unit is
in said raised position, air conditioning means in said base, and
means for circulating air from said air conditioning means through
the space between the support and wall forming members to said
column for return to said air conditioning means.
8. A baby incubator as defined in claim 7 wherein said cover is
yieldably mounted on said column.
9. A baby incubator as defined in claim 7 wherein means are
provided for circulating conditioned air through the space about
said support including an air duct located within said column and
communicating with said space.
10. A baby incubator as defined in claim 9 wherein there is a base
located below said support and having air conditioning means
therein, said column has an air duct therein communicating at its
upper end with the space beneath said cover and communicating at
its lower end with said air conditioning means, and means are
provided for circulating air through said space, said duct and said
air conditioning means.
11. A baby incubator comprising a base, a generally rectangular
infant support mounted on said base, wall forming members extending
upward from said base on all four sides of said support, said wall
forming members having the upper edges thereof located at a level
above said support and cooperating to define an enclosure which
extends about the sides of said support but is open at the top, the
opening at the top of said enclosure being generally coextensive
with the support whereby the support is substantially wholly
exposed to provide access to a supported infant, at least two of
said wall forming members located at opposite sides of said support
being spaced from the support to define air passages therebetween
at said opposite sides of the support, and having inwardly inclined
air deflecting means adjacent the upper edges thereof, means below
the support and including a blower for establishing at least one
pair of air curtains flowing upwardly through the air passages
between said support and said opposite wall forming members and
over the inner surfaces thereof into contact with said air
deflecting means so that said air curtains will be directed
inwardly into impinging contact adjacent the open top of said
enclosure and above a patient resting on said support and will
thereafter exit through the open top of the enclosure and means in
said base for conditioning the air forming said air curtain.
12. A baby incubator as defined in claim 11 wherein at least a
portion of the air utilized in establishing said air barrier is
recirculated through said air conditioning means.
13. A baby incubator as defined in claim 11 wherein a cover member
is located above said wall forming members, and said wall forming
members and cover member are relatively movable into and out of a
position wherein they enclose said infant support.
Description
FIELD OF INVENTION
Baby incubators are widely used for the protection of newborn
babies and particularly premature babies who need special care and
attention. For this purpose, it is usual to provide such incubators
with an infant support or mattress about which wall forming members
extend to establish a partial or complete enclosure for the infant.
Air which has been heated and humidified or otherwise conditioned
is then circulated through the enclosure to maintain the infant at
the desired temperature, to avoid excessive loss of moisture or to
assure the desired sterile or other conditions required for the
welfare of the infant. Typical baby incubators of the prior art are
disclosed in the following U.S. Pat. Nos.:
2,633,842
2,708,927
2,980,106
3.076,451
3,335,713
3,470,866
3,529,590
While such constructions have been widely used, they do not serve
to provide access to an infant supported within the incubator from
opposite sides thereof or by more than one individual at a time.
Furthermore, those members forming side walls of an enclosure
extending about an infant within the incubator have been at least
partially fixed in position or have been pivotally movable outward
to afford access to an infant, whereby a nurse or doctor must step
back away from the infant in order to swing the wall forming member
out of the way. Such an arrangement of movable wall forming members
also limits the number of infant incubators which may be located
within any given space. Moreover, the manner in which air is
circulated within the enclosure of previous baby incubators does
not effectively prevent the infant from losing heat by radiation to
cooler walls of the enclosure or serve to afford any protection for
the infant when the incubator is opened to permit access to the
infant.
THE PRESENT INVENTION
In accordance with the present invention various types of baby
incubators are provided wherein a support for an infant is
encircled by wall forming members over which conditioned air is
passed in a manner to heat said members to a desired temperature
and aid in maintaining desired and predetermined conditions within
the incubator and about a patient on the support. In a preferred
embodiment of the invention the members forming those walls which
extend about the sides of the support are movable to opened and
closed positions affording ready access to the patient when
desired. At the same time the construction serves to establish an
air enclosure extending about and over the support so as to
effectively isolate the patient from adverse conditions of the
ambient atmosphere such as extremes and variations in temperature,
harmful airborne organisms or other contaminants, while affording
ready access to the patient.
THE DRAWINGS
FIG. 1 is a diagrammatic vertical sectional view through one form
of baby incubator embodying the present invention;
FIG. 2 is a diagrammatic longitudinal sectional view of an
alternative embodiment of the present invention;
FIG. 3 is a top plan view of the construction shown in FIG. 2
indicating a typical pattern of air circulation which may be
established therein;
FIG. 4 is a perspective illustrating a further alternative
embodiment of the present invention with the elements thereof
arranged in a patient enclosing position;
FIG. 5 is a view similar to FIG. 4 with the elements arranged to
afford access to a patient in the incubator;
FIG. 6 is a longitudinal sectional view of the construction as
shown in FIG. 4;
FIG. 7 is a transverse sectional view of the construction as shown
in FIG. 5;
FIGS. 8, 9 and 10 illustrate details of the cover and mounting
means therefore as shown in FIGS. 4 to 7;
FIG. 11 is a view looking upward into the cover of FIGS. 8, 9 and
10;
FIG. 12 is a diagrammatic vertical sectional view of typical means
for use in supporting and moving the wall forming members of FIGS.
4 to 7;
FIG. 13 is a view taken at right angles to FIG. 12 illustrating
details of construction;
FIG. 14 is a transverse sectional view through a further
alternative form of baby incubator embodying the present invention;
and
FIG. 15 is a longitudinal sectional view through the construction
illustrated in FIG. 14.
PREFERRED EMBODIMENTS OF THE INVENTION
In that form of the invention chosen for purposes of illustration
in FIG. 1 a baby incubator is provided with a base 2 having a tray
or support 4 for a mattress 6 upon which the patient may be placed.
Wall forming members 8 which are preferably formed of transparent
plastic, glass or the like, extend upward from the base 2 and are
spaced from the sides of the mattress support 4 to provide air
passages 10 through which currents of air may flow upward toward
the space 12 above the patient and surrounded by the walls 8. The
upper edges of the wall forming members are inclined inward as
shown at 14 so as to cause the air issuing from the passages 10
about the sides of the mattress to be directed upward and inward
into impinging contact above the patient and the open top of the
incubator. The air thus directed serves to establish an air barrier
which isolates and protects the patient from the ambient air while
rendering the patient accessible to nurses and attendants. The air
used in producing the air barrier is drawn from the exterior of the
incubator through an opening 16 by means of a fan 18 and is passed
through an air conditioning chamber 20 containing a filter, a
humidifier and a heating element, as well as any other selected
means utilized in conditioning, treating, or purifying the air
being circulated.
The construction thus provided not only serves to isolate the
patient from the ambient and unconditioned air but also serves to
direct heated and conditioned air over the wall forming members 8
whereby loss of heat from the infant to colder surrounding walls of
the incubator is prevented. Moreover, fogging and condensation of
moisture on the side walls of the incubator is reduced so that the
patient can be kept under constant observation. At the same time
the open top of the incubator is unobstructed by the isolating air
barrier and therefore the doctor, nurse or attendant can have
immediate and ready access to the patient at all times.
In that form of the invention illustrated in FIGS. 2 and 3 of the
drawing the air utilized in establishing a protective barrier above
the patient is recirculated so as to reduce or eliminate
intermingling of the conditioned air with ambient air from the
exterior of the incubator. Accordingly, the base 30 of the
incubator has an air conditioning chamber 32 therein through which
air is circulated by means of a blower 34. Air is discharged from
the chamber 32 through suitable outlets 36 which may be distributed
at suitable points about the sides of the chamber 32 so as to pass
upward through passages 38 at sides and ends of the mattress
support 40. The conditioned air is thus caused to flow upward over
the inner surfaces of the side wall forming members 42 into contact
with the inwardly inclined air deflecting upper portions 44 of the
side walls. The conditioned air flows over and above the patient
resting upon the mattress support 40 through the space 46 and is
returned to the air conditioning chamber 32 through a return air
passage 48 and return air inlet 50.
The pattern of the air flow within the space 46 above the patient
and the direction and velocity of such air flow can be varied as
desired. Thus as shown in FIG. 3, the width of the air passages 38
at the sides of the support 40 may be somewhat greater adjacent the
left hand end of the incubator than at the right hand end thereof
so as to assure substantially uniform velocity in the flow of
conditioned air longitudinally through the space 46. The pattern of
air circulation can of course be otherwise arranged by suitable
location and formation of the air inlet and outlet passages
provided.
In any event, the construction provided renders it possible to
produce and maintain a controlled environment for the patient
within the incubator while rendering the patient continuously
accessible for attention and observation. Moreover, loss of heat
from the patient to the side walls of the incubator is precluded by
the continued flow of warm air over the wall forming members.
Furthermore, the patient is effectively isolated from the ambient
atmosphere above the patient by an air barrier of controlled and
conditioned air established above the open top of the wall forming
members extending about the sides of the infant support.
In some instances and for some purposes it may be desired to
provide the incubator with a removable cover or hood 52 adapted to
cooperate with the air deflecting upper portions 44 of the wall
forming members. The space 46 above and about the patient can thus
be closed to prevent possible loss of oxygen, contamination of the
air being circulated, excessive heating of the ambient atmosphere,
or for other reasons.
In that form of the invention illustrated in FIGS. 4 to 10 of the
drawings, the incubator has a base 62 which preferably has wheels
or casters 64 permitting it to be moved about as desired. An infant
support 66 is located near the top of the base for receiving a
mattress 68 upon which an infant may be placed. Wall forming
members 70, 72, 74 and 76 are arranged about the outer sides of the
base 62 and are preferably connected together so as to form a
unitary assembly which may be moved vertically from a raised,
patient-enclosing position as shown in FIG.4 to a lowered position
as shown in FIG. 5 which serves to provide access to the infant
from all sides. The wall forming members, when thus lowered, are
arranged in telescoping relation with respect to the base 62 so
that it is not necessary for a nurse or attendant to move back away
from the incubator in moving the wall forming members from one
position to another.
In order to maintain a controlled environment within the incubator
and about an infant resting upon the mattress 68 on infant support
66, means are housed within the base 62 for filtering, heating
humidifying or otherwise treating and conditioning air and
circulating it within the incubator. Such means may be of any
conventional or preferred type and construction and are designed to
draw some ambient air into the base and to discharge some
conditioned air from the incubator through suitable openings as
represented at 78 and 79. These openings are opened or closed,
depending on whether or not oxygen is being administered or not.
The treated air is circulated by a blower, indicated at 80 so as to
cause it to flow upwardly through passages 82 located between and
adjacent the opposite sides of the infant support 66 and the wall
forming members 70 and 74. In a similar way, passages 84 are
located between the opposite ends of support 66 and the wall
forming members 72 and 76. In this way, curtains of warm air are
directed upwardly over the inner surfaces of the wall forming
members in the manner shown in FIGS. 6 and 7 to eliminate or
minimize patient heat losses by radiation to the wall forming
members. As a result, it is possible to maintain said wall forming
members at a constant, uniform and predetermined temperature. Such
control may be effected as desired by proper selection of the
temperature and velocity of the film of air moving past the wall
forming means.
The upper edges of the wall forming members 70 to 76 are
The upper edges of the wall forming members 70 to 76 are preferably
inclined inwardly as indicated at 86 so as to cause the air flowing
upward over the inner sides thereof to be deflected inwardly to
establish an air barrier above the open top of the incubator as
described above in connection with the constructions shown in FIGS.
1, 2 and 3 of the drawings. However, as shown in FIGS. 4 to 10, the
incubator is preferably provided with a cover or hood 88 adapted to
close the open top of the incubator. For this purpose the cover 88
is provided with lower surfaces 90 engageable with the upper and
inwardly inclined air deflecting surfaces 86 of the side wall
forming members 70 to 76. Conditioned air then may be recirculated
through the air conditioning and purifying means by passage
downward from beneath the cover 88 to a return air duct 92 located
within a column or standard 94 positioned adjacent one end of the
base 62 of the incubator. Duct 92 may serve as a housing for air
filtering or conditioning and circulating means if desired.
The cover 88 is arranged to extend horizontally outward from the
column 94 over the top of the incubator and the assembled side wall
members 70 to 76. However, it is desirable to support the cover in
such a manner as to permit it to be yieldably moved upward or
sideways with respect to the column 94. For this purpose the cover
is provided on one end with a holder 96 hingedly connected at 98 to
a plate 100 movably supported on the upper end of the column 94. As
shown in FIGS. 8 and 9 the plate 100 is held in engagement with the
top of column 94 by an overlying mounting member 102 having one end
of a spring 104 secured thereto. The opposite end of the spring 104
is secured to a bracket 106 on the holder 96 of the cover 88
whereby the weight of the cover is at least partially supported to
permit it to be easily moved upward about its hinge 98 to the
dotted line position of FIG. 8. Further, as shown in FIG. 8, the
holder 96 for the cover 88 is provided with an end member 108
engageable with the inner face 110 of the column 94 to hold the
cover in its normal horizontal position whereas an opening 112 in
the end member allows air from beneath the cover 88 to pass into
return air duct 92 for recirculation through the air conditioning
means within the base 62 of the incubator.
The cover 88 also may be provided with a horizontal air duct 114
therein by mounting a sheet of material 115 beneath the top of the
cover and spacing the sides thereof from the sides and ends of the
cover as shown in FIG. 11. The end of duct 114 adjacent the column
94 may then communicate with the holder 96 and return air duct 92
whereas open sides of the duct 114 are arranged adjacent the sides
of cover 88 and designed to assure substantially uniform or
controlled flow of the air upward over the inner surfaces of the
wall forming members 70 to 76 to air duct 114 when the incubator is
closed by engagement of the cover with the wall forming member. The
cover 88 and its air duct 114 also serve to aid in establishing
peripheral air flow upward about the support 66 when the cover is
raised to afford access to the patient in the incubator as shown in
FIG. 7.
In order to permit limited yielding movement of the cover 88 in a
horizontal direction the plate 100 to which the cover is hingedly
connected may be provided with notches 116 engageable with fixed
pins 118 on the mounting member 102. Since the pins 118 and notches
are located on opposite sides of the vertical plane in which spring
104 is located, the spring urges the notches in plate 100 toward
pins 118 but still permits the plate, together with the cover 88,
holder 96 and hinge 98 to be yieldably displaced sideways as shown
in dotted lines in FIG. 9, when desired.
In the preferred construction illustrated in FIGS. 12 and 13, the
wall forming members 70 to 76 are connected together as a unit, the
unit is mounted on vertically movable rods 120 located adjacent the
four corners of the assembly. Means are provided for yieldably
holding the assembly in any elevated position to which it may be
moved while preventing cocking or jamming of the assembly as it is
raised or lowered. For this purpose, the rods 120 pass through
guides or bushings 122 mounted on the base 62 and the rods at the
opposite ends of the assembly are connected to cross bars 124 and
126. A tensioning cable 128 has one end thereof attached to the
cross bar 124, from which it extends downward beneath a pulley 120,
then upward over pulley 132, across to a corresponding pulley 134
located adjacent the opposite end of the assembly, thence downward
beneath pulley 136 and upward for attachment of the opposite end of
the cable to the cross bar 126. The construction thus provided
serves to stabilize and guide the assembly in its movement while
allowing it to be readily raised and lowered as required by an
attendant standing at either side or on the end of the
incubator.
It is generally preferred to assure firm engagement of the upper
edges of the wall forming members of the assembly with the cover or
bonnet 88 when the assembly is in its raised, infant-enclosing
position. Therefore a thrust plate 138 may be pivotally mounted at
140 on each end of the base 62 and yieldably urged by a spring
member 142 in a counter clockwise direction as seen in FIG. 13
about the pivot 140. A cam slot 146 in each thrust plate 138 will
then receive a pin 148 on one of the cross bars 124 and 126 to urge
the assembly of wall forming members upward during the upper limit
of their movement to a raised position. However, when the assembly
is moved downward, the pins 148 will rock the thrust plates 138 in
a clockwise direction about the pivot pins to an over-center
position so that it is only necessary to apply enough downwardly
directed force to the assembly to overcome the limited tension of
the spring members 142. For this purpose, the assembly of wall
forming members may be provided with handles 150 at opposite ends
thereof near the upper edges of the members 70 and 74.
In a further alternative form of the present invention as shown in
FIGS. 14 and 15, the base 160 of the incubator has a vertical
column 162 thereon provided with a horizontally extending
cantilever beam 164 or the like about which an assembly 166 of wall
forming members is rotatable from the full line position of FIG. 14
to the dotted line position shown. The cantilever beam 164 has a
support 168, for receiving a mattress and infant, carried thereby
and spaced above the beam 164 so as to provide an air space 170
through which conditioned air may be passed from the column 162 by
means of an air supply opening 172. Air may then flow upward about
the sides and end of the support 168 through passages 174 for
return to the column 162 through a return air opening 178 leading
to air conditioning and circulating means 180 housed within the
column 162.
The assembly of wall forming members 166 includes an upper portion
having side walls 182 which extend outward and downward at opposite
sides of the infant support 168 so as to present air passages 174
through which conditioned air may flow upward from air space 170
beneath the infant support 168. The curtain of air thus established
prevents loss of heat by radiation from an infant on the support to
the side walls 182. The edge portions 186 of the side walls 182 of
the assembly 166 are inclined inwardly below the cantilever beam
164 as shown in FIG. 14 and serve to close the sides of the air
space 170 beneath the infant support 168 by contact with the
opposite edges of the beam 164. Flexible sealing strips 188 may be
mounted on the cantilever beam 164 if desired to prevent air
leakage between the beam and edge portions 186 of the assembly
166.
The outer end of the beam 164 has a plate 190 extending upward
thereon and provided with a pivot means 192 engageable by a
complementary element on the outer end wall 196 of the assembly
166. The opposite or inner end wall 198 of the assembly 166 is
provided with a circular opening 200 which receives an annular
collar 202 on column 162 surrounding the air supply opening 172 and
return air opening 178. The assembly 166 therefore is rotatable
from the full line position of FIG. 14, wherein the infant support
is enclosed within the assembly of wall forming members 166, to an
inverted dotted line position of FIG. 14. The assembly 166 may be
thus rotated and inverted by a handle 204 mounted on the outer end
wall 198 whereby the inclined edge portions 186 of the side walls
182 are brought into positions wherein they are spaced from the
opposite sides of the infant support 168. At the same time the
extremities 206 of the edges 186 are disposed somewhat above the
level of the infant support 168 whereby the air flowing upward from
air space 170 will serve to establish an air barrier above the
support 168 to protect an infant on the support from adverse
effects of ambient atmosphere above the support.
As particularly shown in FIG. 15 the infant support 168 used in
infant incubators embodying the present invention may be provided
with legs or brackets 208 which are pivotally or otherwise mounted
on the support for movement to various positions for adjusting the
level of the infant support with respect to the inwardly inclined
air deflecting edges of adjacent forming members. Thus when the
wall forming members are moved to an open position rendering the
patient on the infant support readily accessible to attendants, the
relative position of the air deflecting means and infant support
can be adjusted to afford the greatest convenience to attendants or
to establish the most effective form and type of air barrier
adjacent and above the open top of the enclosure extending about
the sides of the infant support.
It will be apparent from the foregoing description and drawings
showing various embodiments of the present invention, that the
construction is capable of many modifications in the form, assembly
and combination of the features disclosed above. It should
therefore be understood that such embodiments are intended to be
illustrative only and are not intended to limit the scope of the
following claims.
* * * * *