Self-cleaning cerumen guard for a hearing device

• US 6,135,235 A
• Filed: 04/06/1999
• Issued: 10/24/2000
• Est. Priority Date: 04/06/1999
• Status: Expired due to Term

• Current Assignee: Sonic Innovations Incorporated (William Demant Fonden)
• Original Assignee: Sonic Innovations Incorporated (William Demant Fonden)
• Inventors: Brimhall, Owen D.
• Primary Examiner(s): Martin, David
• Assistant Examiner(s): San Martin, Edgardo
• Application Number:
  US09/287,228
• Time in Patent Office: 567 Days
• Field of Search: 181/135, 181/130, 181/129, 181/128, 181/126, 181/134, 181/133, 381/312, 381/325, 381/322, 381/328, 381/330, 381/68, 381/68.6, 381/68.7, 381/69, 381/138
• US Class Current: 181/135
• CPC Class Codes: H04R 25/654 Ear wax retarders

Abstract

A self-cleaning cerumen guard includes a thermally activated element. The cerumen guard is mounted on the distal end of a hearing device adjacent to a sound port. The thermally activated element is oriented in a manner which causes it to retract when heated to a first temperature range and extend when cooled to a second temperature range, such that, upon removal of the hearing device from an ear canal, the self-cleaning cerumen guard will automatically remove any accumulated debris from the sound port.

Claims

1. A cerumen guard for a hearing device, comprising:

a thermally activated element, wherein the thermally activated element is generally elongate and has a first end and a second end, the cerumen guard further comprising a base connected to the first end, and a plunger connected to the second End, respectively, of the thermally activated element.

6. The cerumen guard of claim 1, wherein the base is configured for mounting to an in-the-canal hearing device.

7. The cerumen guard of claim 1, wherein the plunger is configured such that an extension or retraction of the thermally activated element causes the plunger to move.

8. The cerumen guard of claim 1, wherein the plunger includes a cerumen repellant coating.

9. The cerumen guard of claim 8, wherein the repellant coating is oleophobic.

2. A cerumen guard for a hearing device, comprising:

a thermally activated element, wherein the thermally activated element maintains a first shape in a first temperature range, and a second shape in a second temperature range, and wherein the first temperature range is approximately 95°

F. and higher, and the second temperature range is approximately 90°

F. and lower.

3. A cerumen guard for a hearing device, comprising:

a thermally activated element, wherein the thermally activated element is generally elongate and is in a retracted position in a first temperature range, and an extended position in a second temperature range.

4. The cerumen guard of claim 3, wherein the first temperature range is approximately 95°

F. and higher, and the second temperature range is approximately 90°

F. and lower.

5. The cerumen guard of claim 3, wherein the first temperature range is approximately 90°

F. and lower, and the second temperature range is approximately 95°

F. and higher.

10. A cerumen guard for a hearing device, comprising:

a thermally activated element having a first end and a second end;

wherein the thermally activated element is circularly wound having an outer ring, and oriented such that the first end is radially disposed and the second end is centrally disposed.

11. The cerumen guard of claim 10, further comprising a housing at least partially enclosing the thermally activated element, the housing having an interior surface connected to the first end of the thermally activated element.

12. The cerumen guard of claim 10, wherein the thermally activated element maintains a first shape in a first temperature range and a second shape in a second temperature range.

13. The cerumen guard of claim 12, wherein the first temperature range is approximately 95°

F. and higher, and the second temperature range is approximately 90°

F. and lower.

14. The cerumen guard of claim 12, wherein the first temperature range is approximately 90°

F. and lower, and the second temperature range is approximately 95°

F. and higher.

15. The cerumen guard of claim 11, wherein the housing includes an aperture aligned with the outer ring of the thermally activated element.

16. The cerumen guard of claim 10, further comprising a generally elongate plunger having a first end and a second end, wherein the first end of the plunger is connected to the second end of the thermally activated element.

17. A hearing device comprising:

a housing having an interior surface; and

a cerumen guard, the cerumen guard comprising

a disk formed from a thermally activated material, the disk having a circumferential surface, an upper surface and a lower surface, wherein the circumferential surface of the disk is connected to the interior surface of the receiver housing.

18. The hearing device of claim 17, wherein the disk maintains a first shape in a first temperature range and a second shape in a second temperature range.

19. The cerumen guard of claim 18, wherein the first temperature range is approximately 95°

F. and higher, and the second temperature range is approximately 90°

F. and lower.

20. The cerumen guard of claim 18, wherein the first temperature range is approximately 90°

F. and lower, and the second temperature range is approximately 95°

F. and higher.

21. The hearing device of claim 17, further comprising a generally elongate plunger having a first end and a second end, wherein the first end is connected to the upper surface of the disk.

22. The hearing device of claim 17, wherein the disk does not block the transmission of acoustic energy.