Burning oven

• US 20060088077A1
• Filed: 06/15/2005
• Published: 04/27/2006
• Est. Priority Date: 10/21/2004
• Status: Active Grant

• Current Assignee: Ivoclar Vivadent AG
• Original Assignee: Ivoclar Vivadent AG
• Inventors: Jussel, Rudolf, Feichtinger, Heinrich K.
• Granted Patent: US 7,534,028 B2
• Time in Patent Office: Days
• US Class Current: 374/141
• CPC Class Codes: A61C 13/20 Methods or devices for soldering, casting, moulding or melting A61C13/04, A61C13/081 take precedence
• CPC Class Codes: F27B 17/025 for dental workpieces
• CPC Class Codes: F27D 19/00 Arrangements of controlling devices
• CPC Class Codes: F27D 21/0014 Devices for monitoring temperature
• CPC Class Codes: G01K 15/002 Calibrated temperature sources, temperature standards therefor arrangements with respect to the cold junction of thermo-electric elements G01K7/12

Abstract

A burning oven, especially for dental materials, is provided and includes a temperature detection element and a calibrating device for calibrating the temperature detection element. The calibrating device has a temperature sensor that in turn can be calibrated at a given number of temperature points, especially one or two temperature points.

Claims

1. A burning oven comprising:

a temperature detection element (12); and

a calibrating device (26) for calibrating said temperature detection element, wherein said calibrating device has a temperature sensor (28) that is adapted to be calibrated at a given number of temperature points.

2. A burning oven according to claim 1, wherein said given number of temperature points is one or two temperature points.

3. A burning oven according to claim 1, wherein at least one of said temperature points is a melting point of an essentially pure substance (42) that upon reaching its melting point changes its aggregate state, and wherein the temperature of the substance that remains constant during the duration of the aggregate state change is utilized for the temperature detection.

4. A burning oven according to claim 3, wherein said essentially pure substance is a metal.

5. A burning oven according to claim 3, wherein said temperature sensor (28) is in thermal connection with said substance (42), and/or said substance at least partially surrounds said temperature sensor.

6. A burning oven according to claim 5, wherein said substance is disposed between said temperature sensor and a further material that at least partially surrounds a portion of said temperature sensor.

7. A burning oven according to claim 6, wherein said substance is disposed at least partially in a closed space formed between said temperature sensor (28) and said further material.

8. A burning oven according to claim 6, wherein said further material completely surrounds said substance.

9. A burning oven according to claim 6, wherein said further material is formed from a ceramic layer.

10. A burning oven according to claim 3, wherein said substance is selected from the group consisting of silver, aluminum, gold, magnesium, zinc, tin, alloys thereof and mixtures thereof.

11. A burning oven according to claim 1, wherein said burning oven (10) is provided with an oven hood (14) and an oven base (22), and wherein said calibrating device (26), with said temperature sensor (28), is disposed approximately centrally in the middle of the oven and can be removed therefrom.

12. A burning oven according to claim 11, wherein said calibrating device (26) and said temperature sensor (28) are disposed on said oven base (22).

13. A burning oven according to claim 11, wherein said temperature detection element (12) is disposed in said oven hood (14), especially in the vicinity of a wall or cover thereof, or in a region of said oven base (22).

14. A burning oven according to claim 1, wherein an in particular automatic adjustment device (30) is provided in said burning oven (10), and wherein by means of said adjustment device said calibrating device (26) adjusts said temperature detection element (12) at a plurality of temperatures.

15. A burning oven according to claim 14, wherein said temperature sensor (28), by said calibration via the given number of temperature points, determines a temperature offset of said calibrating device (26) and said adjustment device (30) that can be stored until a subsequent calibration.

16. A burning oven according to claim 1, wherein for calibration of said temperature detection element (12), said calibrating device (26) has stored a prescribed temperature profile, and wherein said calibration via said calibrating device is effected while starting a temperature profile, one time with overpressure or underpressure, and one time at ambient air pressure.

17. A burning oven according to claim 1, wherein said calibrating device (26) is fixedly installed in said burning oven (10), especially in the region of an oven base (22) thereof.

18. A burning oven according to claim 1, wherein said calibrating device (26) is insertably mounted on said burning oven (10) and after insertion projects into a combustion chamber (16) thereof.

19. A burning oven according to claim 18, wherein said calibrating device (26) is movably mounted in or on said burning oven (10), in particular via a gooseneck.

20. A burning oven according to claim 1, wherein said calibrating device (26) is embodied as a retrofittable device for a burning oven.