Thermal tympanic thermometer

• US 7,434,991 B2
• Filed: 05/19/2006
• Issued: 10/14/2008
• Est. Priority Date: 12/12/2002
• Status: Expired due to Term

• Current Assignee: Cardinal Health Ireland Unlimited Company (Cardinal Health, Inc.)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Harr, James M., Walker, Clarence
• Primary Examiner(s): VERBITSKY, GAIL KAPLAN
• Application Number:
  US11/419,424
• Publication Number:
  US 20060239332A1
• Time in Patent Office: 879 Days
• Field of Search: 374/120, 374/121, 374/131, 374/133, 374/135, 374/137, 374/158, 374/163, 374/208, 600/474, 600/549
• US Class Current: 374/121
• CPC Class Codes: G01J 5/02 Constructional details
• CPC Class Codes: G01J 5/0205 Mechanical elements; Supports for optical elements
• CPC Class Codes: G01J 5/021 Probe covers for thermometers, e.g. tympanic thermometers; Containers for probe covers; Disposable probes
• CPC Class Codes: G01J 5/04 Casings
• CPC Class Codes: G01J 5/049 Casings for tympanic thermometers
• CPC Class Codes: G01J 5/06 Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity for adjusting of solid angle of collected radiation G01J5/07; means for wavelength selection G01J5/0801
• CPC Class Codes: G01J 5/064 Ambient temperature sensor; Housing temperature sensor; Constructional details thereof
• CPC Class Codes: G01J 5/12 using thermoelectric elements, e.g. thermocouples

Abstract

A tympanic thermometer includes a thermally conductive nozzle extending from a distal end of the thermometer. A base of a sensor can is thermally connected to the nozzle to define a path of conductive heat transfer from the nozzle to the base of the can thereby minimizing a thermal gradient between proximal and distal ends of the sensor can when temperature is measured in the ear.

Claims

1. A tympanic thermometer having a proximal end and a distal end, the thermometer comprising:

a thermally conductive nozzle extending from the distal end of the thermometer, the nozzle being located and shaped to receive a probe cover thereon,

a sensor can housing temperature sensing electronics for sensing temperature, the sensor can including a base thermally connected to the nozzle to define a path of conductive heat transfer from the nozzle to the base of the can, the sensor can being otherwise free of thermal connection with a thermally conductive structure of greater mass than the sensor can,

the thermometer in combination with the probe cover thermally connected to the nozzle as part of the path of conductive heat transfer, wherein heat from outside the thermometer is transferred from the probe cover through the nozzle to the base of the sensor can via the path of conductive heat transfer, and further wherein the probe cover is thermally connected to the nozzle solely at a distal end margin of the nozzle.

2. A tympanic thermometer as set forth in claim 1 wherein the base of the sensor can is secured directly to the nozzle.

3. A tympanic thermometer as set forth in claim 2 wherein the base of the sensor can is secured to an internal ridge of the nozzle.

4. A tympanic thermometer as set forth in claim 3 further comprising a non-thermally conductive retainer secured to the nozzle to sandwich the base of the sensor can between the internal ridge and the retainer.

5. A tympanic thermometer as set forth in claim 3 wherein the base of the sensor can is secured to the nozzle using a thermally-conductive adhesive.

6. A tympanic thermometer as set forth in claim 5 wherein a distal surface of the base of the sensor can is secured to the internal ridge of the nozzle and an opposite proximal surface of the base is free from contact with any structure.

7. A tympanic thermometer as set forth in claim 1 wherein the nozzle defines an air space adjacent a proximal side of the sensor can.

8. A tympanic thermometer as set forth in claim 7 wherein the thermometer is free of structure in thermal connection with the sensor can other than the nozzle.

9. A tympanic thermometer as set forth in claim 1 wherein the nozzle and sensor can are constructed and arranged to define a heat transfer path from the nozzle to the sensor can and to inhibit heat transfer away from the sensor can thereby minimizing a thermal gradient between proximal and distal ends of the sensor can when temperature is measured in the ear.

10. A tympanic thermometer as set forth in claim 1 wherein the nozzle is made of metal and the sensor can is free of thermal connection with a metallic object other than the nozzle.

11. A tympanic thermometer having a proximal end and a distal end, the thermometer comprising:

a thermally conductive nozzle extending from the distal end of the thermometer, the nozzle being located and shaped to receive a probe cover thereon,

a sensor can housing temperature sensing electronics for sensing temperature, the sensor can including a base thermally connected to the nozzle to define a path of conductive heat transfer from the nozzle to the base of the can, the sensor can being otherwise free of thermal connection with a thermally conductive structure of greater mass than the sensor can,

the thermometer further comprising a spring locator disposed in the nozzle and resiliently biasing the sensor can into contact with the nozzle, wherein the spring locator comprises spring members and a reinforcing element engaging the spring members to increase their spring force.

12. A tympanic thermometer as set forth in claim 11 wherein the spring locator is formed of one piece of material.

13. A tympanic thermometer having a proximal end and a distal end, the thermometer comprising:

a thermally conductive nozzle extending from the distal end of the thermometer,

a sensor can housing temperature sensing electronics for sensing temperature, the sensor can including a base thermally connected to the nozzle,

the nozzle defining an air space on a proximal side of the sensor can base to inhibit heat transfer from the sensor can,

the thermometer in combination with the probe cover thermally connected to the nozzle as part of the path of conductive heat transfer, wherein heat from outside the thermometer is transferred from the probe cover through the nozzle to the base of the sensor can via the path of conductive heat transfer, wherein the probe cover is thermally connected to the nozzle solely at a distal end margin of the nozzle.

14. A tympanic thermometer as set forth in claim 13 wherein the base of the sensor can is secured directly to the nozzle.

15. A tympanic thermometer as set forth in claim 14 wherein the base of the sensor can is secured to an internal ridge of the nozzle.

16. A tympanic thermometer as set forth in claim 15 wherein the base of the sensor can is secured to the nozzle using a thermally-conductive adhesive.

17. A tympanic thermometer as set forth in claim 16 wherein a distal surface of the base of the sensor can is secured to the internal ridge of the nozzle and an opposite proximal surface of the base is free from contact with any structure.

18. A tympanic thermometer as set forth in claim 13 wherein the thermometer is free of structure in thermal connection with the sensor can other than the nozzle.

19. A tympanic thermometer as set forth in claim 13 wherein the nozzle and sensor can are constructed and arranged to define a heat transfer path from the nozzle to the sensor can and to inhibit heat transfer away from the sensor can thereby minimizing a thermal gradient between proximal and distal ends of the sensor can when temperature is measured in the ear.

20. A tympanic thermometer as set forth in claim 13 wherein the nozzle is made of metal and the sensor can is free of thermal connection with a metallic object other than the nozzle.