Transparent film radiant heat source for use with incubators

• US 5,119,467 A
• Filed: 08/02/1990
• Issued: 06/02/1992
• Est. Priority Date: 08/02/1990
• Status: Expired due to Fees

• Current Assignee: Hill-Rom Services Incorporated (Baxter International Inc.)
• Original Assignee: Hill-Rom Manufacturing Incorporated (Baxter International Inc.)
• Inventors: Barsky, Barry E., Bagnell, Joseph P., Wenstrup, Jan F.
• Primary Examiner(s): Reynolds, Bruce A.
• Assistant Examiner(s): Jeffery, John A.
• Application Number:
  US07/561,893
• Time in Patent Office: 670 Days
• Field of Search: 219/543, 219/203, 219/411, 219/405, 338/308-309, 600/22, 237/3, 237/14, 236/2, 236/3, 119/37, 392/407, 392/435, 392/438, 392/439
• US Class Current: 392/439
• CPC Class Codes: A61B 2017/00902 transparent or translucent
• CPC Class Codes: A61F 2007/0088 Radiating heat
• CPC Class Codes: A61G 11/00 Baby-incubators; Couveuses
• CPC Class Codes: A61G 11/009 with hand insertion windows, e.g. in the walls
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 2203/032 Heaters specially adapted for heating by radiation heating
• CPC Class Codes: H05B 3/26 heating conductor mounted on insulating base for transparent areas H05B3/84, H05B3/86

Abstract

A radiant heater is provided, which can be in the form of an overlay on an existing incubator hood or integrated in an incubator hood. The heater has an optically transparent, radiotransparent and phototherapy transparent electrically conductive coating, preferably indium tin oxide.

Claims

1. A radiant heat source overlay for an incubator hood comprising:

a rigid, transparent plastic sheet shaped to rest on an incubator hood and adapted to be removably placed on said hood;

a film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof and extending over a selected surface area of said rigid, transparent plastic sheet facing an incubator hood when said overlay rests on said incubator hood; and

a set of incubator units electrically and mechanically connected to said transparent, electrically conductive coating with each of said conductor units having a free end adapted for connection to an electrical power source.

2. A radiant heat source overlay according to claim 1 wherein said transparent, electrically conductive coating is between said rigid, transparent plastic sheet and said film of transparent, plastic material.

3. A radiant heat source overlay according to claim 2 further including a layer of protective material extending over the surface of said film of transparent, plastic material opposite from said surface having said transparent, electrically conductive coating.

4. A radiant heat source overlay according to claim 3 wherein said transparent, electrically conductive coating is bonded to said rigid, transparent plastic sheet by an adhesive layer between said rigid, transparent plastic sheet and said transparent, electrically conductive coating.

5. A radiant heat source overlay according to claim 1 wherein said film of transparent, plastic material is between said rigid, transparent plastic sheet and said transparent, electrically conductive coating.

6. A radiant heat source overlay according to claim 5 further including a layer of protective material extending over said transparent, electrically conductive coating.

7. A radiant heat source overlay according to claim 6 wherein said transparent, electrically conductive coating is bonded to said layer of protective material by an adhesive layer between said layer of protective material and said transparent, electrically conductive coating.

8. A radiant heat source overlay according to claim 4 wherein said layer of protective material is a rigid, transparent plastic sheet.

9. A radiant heat source overlay according to claim 4 wherein said layer of protective material is a transparent layer of silicon dioxide.

10. A radiant heat source overlay according to claim 4 wherein said transparent, electrically conductive coating is indium tin oxide.

11. A radiant heat source overlay according to claim 7 wherein said layer of protective material is a rigid, transparent plastic sheet.

12. A radiant heat source overlay according to claim 7 wherein said transparent, electrically conductive coating is indium tin oxide.

13. An incubator comprising:

a base;

a hood mounted on said base; and

a radiant heat source overlay resting on said hood, adapted to be removably placed on said hood, and having;

(a) a rigid, transparent plastic sheet shaped to rest on an incubator hood;

(b) a film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof and extending over a selected surface area of said rigid, transparent plastic sheet facing an incubator hood when said overlay rests on said incubator hood; and

(c) a set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating with each of said conductor units having a free end adapted for connection to an electrical power source.

14. An incubator according to claim 13 further including:

(a) means for supplying a first signal representative of a desired temperature of said transparent plastic sheet;

(b) means for sensing the temperature of said transparent plastic sheet and for supplying a second signal representative of said temperature of said transparent plastic sheet;

(c) a first power source;

(d) means responsive to said first and said second signals for supplying power from said first power source to said transparent, electrically conductive coating to heat said transparent plastic sheet to said desired temperature;

(e) means for supplying a third signal representative of the desired temperature of one of the skin temperature of an infant within said hood and the air temperature within said hood;

(f) means for sensing one of said skin temperature of an infant within said hood and said air temperature within said hood and for supplying a fourth signal representative of one of said skin temperature of an infant within said hood and said air temperature within said hood;

(g) a second power source;

(h) an air heater; and

(i) means responsive to said third and said fourth signals for supplying power from said second power source to said air heater to heat said air within said hood to one of said desired air temperature within said hood and a level sufficient to develop said desired skin temperature of an infant within said hood.

15. An incubator according to claim 13 further including:

(a) a first power source;

(b) means for controlling power supplied from said first power source to said transparent, electrically conductive coating to heat said transparent plastic sheet;

(c) a second power source;

(d) an air heater; and

(e) means for controlling power supplied from said second power source to said air heater to heat air within said hood.

16. A radiant heat source overlay for an incubator hood comprising:

a vertical section;

an inclined section;

a horizontal section between said vertical section and said inclined section;

said inclined and horizontal sections each including;

(a) a first rigid transparent plastic sheet;

(b) a second rigid transparent plastic sheet;

(c) a film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof, said film disposed between said first and second sheets; and

(d) a set of conductor units electrically and mechanically connected to said electrically conductive coating with each of said conductor units having a free end adapted for connection to an electrical power source; and

means for holding said sections in a fixed relationship to one another.

17. A radiant heat source according to claim 16 wherein each said electrically conductive coating is bonded to one of its respective rigid transparent sheets, and said respective first and second rigid transparent sheets are spaced apart, forming an air gap between each said transparent plastic film and the other respective rigid transparent sheet of said section.

18. A radiant heat source according to claim 17, wherein said electrically conductive coating is indium tin oxide.

19. A radiant heat source overlay for an incubator hood comprising:

a rigid, transparent plastic sheet shaped to rest on an incubator hood and adapted to be removably placed on said hood;

an electrically conductive coating on a selected surface area of said rigid, transparent plastic sheet facing an incubator hood when said overlay rests on said incubator hood; and

a set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating with each of said conductor units having a free end adapted for connection to an electrical power source.

20. A radiant heat source overlay for an incubator hood comprising:

a rigid, transparent plastic sheet shaped to rest on an incubator hood;

a film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof and extending over but spaced from a selected surface area of said rigid, transparent plastic sheet facing an incubator hood when said overlay rests on said incubator hood, said film situated between said rigid, transparent plastic sheet and said transparent, electrically conductive coating;

a rigid, transparent plastic sheet of protective material extending over said transparent, electrically conductive coating and bonded to said transparent, electrically conductive coating by an adhesive layer between said sheet of protective material and said transparent, electrically conductive coating; and

a set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating with each of said conductor units having a free end adapted for connection to an electrical power source.

21. A radiant heat source overlay according to claim 20 wherein said transparent, electrically conductive coating is indium tin oxide.

22. A radiant heat source overlay for an incubator hood comprising:

a rigid, transparent plastic sheet shaped to rest on an incubator hood, and having;

(a) a vertical portion,

(b) an inclined portion, and

(c) a horizontal portion between said vertical portion and said inclined portion;

a film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof, between said film and said horizontal portion of said rigid, transparent plastic sheet and said transparent, electrically conductive coating, said coating extending over a selected surface area of said horizontal portion of said rigid, transparent sheet facing an incubator hood when said overlay rests on said incubator hood;

a layer of protective material extending over the surface of said film of transparent, plastic material opposite from said surface having said transparent, electrically conductive coating;

a set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating with each of said conductor units having a free end adapted for connection to an electrical power source;

a second film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof bonded by an adhesive layer to a surface of said inclined portion of said rigid, transparent plastic sheet facing said incubator hood;

a second set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating of said second film of transparent, plastic material; and

a second layer of protective material extending over the surface of said second film of transparent, plastic material opposite from said surface having said transparent, electrically conductive coating.

23. A radiant heat source overlay according to claim 22 wherein each of said conductor units includes a bus bar extending along an edge of a transparent, electrically conductive coating and a lead wire extending from an end of said bus bar and said bus bars of a set of conductor units extend along opposite edges of their associated transparent, electrically conductive coating.

24. A radiant heat source overlay according to claim 23 wherein said lead wires of one set of conductor units extend from their associated bus bars at opposite ends of their associated transparent, electrically conductive coating.

25. A radiant heat source overlay for an incubator hood comprising:

a rigid, transparent plastic sheet shaped to rest on an incubator hood, and having;

(a) a vertical portion,

(b) an inclined portion, and

(c) a horizontal portion between said vertical portion and said inclined portion;

a film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof and extending over said horizontal portion of said rigid, transparent plastic sheet and facing an incubator hood when said overlay rests on said incubator hood, said film situated between said horizontal portion of said rigid transparent plastic sheet and said transparent electrically conductive coating;

a layer of protective material extending over said transparent, electrically conductive coating and to which said transparent, electrically coating is bonded by an adhesive layer between said layer of protective material and said transparent, electrically conductive coating;

a set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating with each of said conductor units having a free end adapted for connection to an electrical power source;

a second film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof and extending over a surface of said inclined portion of said rigid, transparent plastic sheet facing an incubator hood when said overlay rests on said incubator hood;

a second set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating of said second film of transparent, plastic material; and

a second layer of protective material to which said transparent, electrically conductive coating of said second film of transparent material is bonded by an adhesive layer between said second layer of protective material and said transparent, electrically conductive coating of said second film of transparent material.

26. A radiant heat source overlay according to claim 25 wherein each of said conductor units includes a bus bar extending along an edge of a transparent, electrically conductive coating and a lead wire extending from an end of said bus bar and said bus bars of a set of conductive units extend along opposite edges of their associated transparent, electrically conductive coating.

27. A radiant heat source overlay according to claim 26 wherein said lead wires of one set of conductor units extend from their associated bus bars at opposite ends of their associated transparent, electrically conductive coating.

28. An incubator hood having a radiant heat source comprising:

a rigid, transparent plastic sheet formed into a concave structure and having;

(a) a vertical portion,

(b) an inclined portion, and

(c) a horizontal portion between said vertical portion and said inclined portion;

a film of transparent, plastic material having an indium tin oxide coating on a surface thereof between said film and said horizontal portion of said rigid, transparent plastic sheet and bonded to an inside surface of said horizontal portion of said rigid, transparent plastic sheet by an adhesive layer between said horizontal portion of said rid, transparent plastic sheet and said indium tin oxide coating;

a layer of protective material extending over the surface of said film of transparent, plastic material opposite from said surface having said indium tin oxide coating;

a set of conductor units electrically and mechanically connected to said indium tin oxide coating with each of said conductor units having a free end adapted for connection to an electrical power source;

a second film of transparent, plastic material having an indium tin oxide coating on a surface thereof bonded by an adhesive layer to a surface of said inclined portion of said rigid, transparent plastic sheet facing said incubator hood;

a second set of conductor units electrically and mechanically connected to said indium tin oxide coating of said second film of transparent, plastic material; and

a second layer of protective material extending over the surface of said second film of transparent, plastic material opposite from said surface having said indium tin oxide coating.

29. An incubator hood according to claim 28 wherein each of said conductor units includes a bus bar extending along an edge of an indium tin oxide coating and a lead wire extending from an end of said bus bar and said bus bars of a set of conductive units extend along opposite edges of their associated indium tin oxide coating.

30. An incubator hood according to claim 29 wherein said lead wires of one set of conductive units extend from their associated bus bars at opposite ends of their associated indium tin oxide coating.

31. An incubator hood having a radiant heat source comprising:

a rigid, transparent plastic sheet formed into a concave structure and having;

(a) a vertical portion,

(b) an inclined portion, and

(c) a horizontal portion between said vertical portion and said inclined portion;

a film of transparent, plastic material having an indium tin oxide coating on a surface thereof and extending over an inside surface of said horizontal portion of said rigid, transparent plastic sheet, said film situated between said horizontal portion of said rigid, transparent plastic sheet and said indium tin oxide coating;

a layer of protective material extending over said indium tin oxide coating and to which said indium tin oxide is bonded by an adhesive layer between said layer of protective material and said indium tin oxide coating;

a set of conductor units electrically and mechanically connected to said indium tin oxide coating with each of said conductor units having a free end adapted for connection to an electrical power source;

a second film of transparent, plastic material having an indium tin oxide coating on a surface thereof and extending over a surface of said inclined portion of said rigid, transparent plastic sheet facing said incubator hood;

a second set of conductor units electrically and mechanically connected to said indium tin oxide coating of said second film of transparent, plastic material; and

a second layer of protective material to which said indium tin oxide coating of said second film of transparent material is bonded by an adhesive layer between said second layer of protective material and said indium tin oxide coating of said second film of transparent material.

32. An incubator hood according to claim 31 wherein each of said conductor units includes a bus bar extending along an edge of an indium tin oxide coating and a lead wire extending from an end of said bus bar and said bus bars of a set of conductor units extend along opposite edges of their associated indium tin oxide coating.

33. An incubator hood according to claim 32 wherein said lead wires of one set of conductor units extend from their associated bus bars at opposite ends of their associated indium tin oxide coating.

34. An incubator hood having a radiant heat source comprising:

a rigid, transparent plastic sheet formed into a concave structure and having;

(a) a vertical portion,

(b) an inclined portion, and

(c) a horizontal portion between said vertical portion and said inclined portion;

a film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof between said film and a first of said portions of said rigid, transparent plastic sheet and bonded to an inside surface of said first of said portions of said rigid, transparent plastic sheet by an adhesive layer between said first of said portions of said rigid, transparent plastic sheet and said transparent, electrically conductive coating;

a layer of protective material extending over the surface of said film of transparent, plastic material opposite from said surface having said transparent, electrically conductive coating;

a set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating with each of said conductor units having a free end adapted for connection to an electrical power source;

a second film of transparent, plastic material having a transparent, electrically conductive coating on a surface thereof bonded by an adhesive layer to a surface of a second of said portions of said rigid, transparent plastic sheet facing said incubator hood;

a second set of conductor units electrically and mechanically connected to said transparent, electrically conductive coating of said second film of transparent, plastic material; and

a second layer of protective material extending over the surface of said second film of transparent, plastic material opposite from said surface having said transparent, electrically conductive coating.

35. An incubator hood as recited in claim 34 wherein said transparent, electrically conductive coating is indium tin oxide.