Sensor over-mold shape

Patent metadata

Field	Value
Publication number	US-9517032-B2
Application number	US-201213362371-A
Country	US
Kind code	B2
Filing date	Jan 31, 2012
Priority date	Jan 31, 2012
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

An implantable sensor module and medical device includes a housing having an inner shell having a thickness extending between an inner wall and an outer wall and an outer layer, wherein the inner shell and the outer layer form a substantially flat portion. A shoulder extends adjacent to a diaphragm to extend the outer layer laterally away from a central medial line extending between edges of the diaphragm. A recess portion is formed between the diaphragm and an inner side of the outer layer, and an over-fill channel is formed by the outer layer extending through the outer layer from an opening formed at the outer wall to an opening formed along the inner side of the outer layer extending along the substantially flat portion.

First claim

The invention claimed is:

1. An implantable medical device, comprising:
a housing having an outer wall and comprising an inner shell and an outer layer formed to extend over and enclose the inner shell to form the outer wall, the inner shell having a thickness extending between an inner wall of the inner shell and an outer wall of the inner shell, the outer layer having an inner side engaged against the outer wall of the inner shell and having a thickness extending between the inner side and the outer wall of the housing, wherein the inner shell and the outer layer form a flat portion;
a flexible diaphragm formed within the inner shell along the flat portion and extending between a first edge and a second edge;
a shoulder extending adjacent to the first edge that extends the outer layer laterally away from a central medial line extending between the first and second edges of the diaphragm;
a recess portion formed between the diaphragm and the inner side of the outer layer; and
an over-fill channel formed by the outer layer and extending through the outer layer from an opening formed at the outer wall to an opening formed along the inner side of the outer layer extending along the flat portion.

2. The device of claim 1 , wherein the shoulder is formed by one or both of the inner shell and the outer layer to have a thickness to reduce contact pressure along the first edge and the second edge of the diaphragm to less than a predetermined percentage of a maximum contact pressure along the central median line.

3. The device of claim 2 , further comprising a second shoulder extending adjacent to the second edge of the diaphragm that extends the outer layer laterally away from the central medial line extending between the first and second edges of the diaphragm.

4. The device of claim 1 , wherein the shoulder comprises a flange extending laterally outward from the outer wall of the housing.

5. The device of claim 4 , wherein housing has a rectangular cross-section comprising a top side and a bottom side, the top side corresponding to the flat portion formed by the inner shell and the outer layer.

6. The device of claim 1 , wherein the thickness of the outer layer along the shoulder is greater than the thickness of the outer layer along a portion of the outer wall of the housing opposite the flat portion.

7. The device of claim 6 , wherein the thickness of the inner shell along the shoulder is approximately equal to the thickness of the inner shell along the portion of the outer wall of the housing opposite the flat portion.

8. The device of claim 1 , wherein the thickness of the inner shell along the shoulder is greater than the thickness of the inner shell along a portion of the outer wall of the housing opposite the flat portion.

9. The device of claim 8 , wherein the thickness of the outer layer along the shoulder is approximately equal to the thickness of the outer layer along the portion of the outer wall of the housing opposite the flat portion.

10. The device of claim 1 , wherein the thickness of the outer layer along the shoulder is greater than the thickness of the outer layer along a portion of the outer wall of the housing opposite the flat portion, and the thickness of the inner shell along the shoulder is greater than the thickness of the inner shell along the portion of the outer wall of the housing opposite the flat portion.

11. The device of claim 10 , wherein the thickness of the outer layer along the shoulder is equal to the thickness of the inner shell along the shoulder.

12. The device of claim 1 , wherein the over-fill channel extends through the shoulder.

13. An implantable medical device lead, comprising:
an elongated lead body;
a housing having an outer wall and comprising an inner shell and an outer layer formed to extend over and enclose the inner shell to form the outer wall, the inner shell having a thickness extending between an inner wall of the inner shell and an outer wall of the inner shell, the outer layer having an inner side engaged against the outer wall of the inner shell and having a thickness extending between the inner side and the outer wall of the housing, wherein the inner shell and the outer layer form a flat portion;
a flexible diaphragm formed within the inner shell along the flat portion and extending between a first edge and a second edge;
a shoulder extending adjacent to the first edge that extends the outer layer laterally away from a central medial line extending between the first and second edges of the diaphragm;
a recess portion formed between the diaphragm and the inner side of the outer layer; and
an over-fill channel formed by the outer layer and extending through the outer layer from an opening formed at the outer wall to an opening formed along the inner side of the outer layer extending along the flat portion.

14. The implantable medical device lead of claim 13 , wherein the shoulder is formed by one or both of the inner shell and the outer layer to have a thickness to reduce contact pressure along the first edge and the second edge of the diaphragm to less than a predetermined percentage of a maximum contact pressure along the central median line.

15. The implantable medical device lead of claim 14 , further comprising a second shoulder extending adjacent to the second edge of the diaphragm that extends the outer layer laterally away from the central medial line extending between the first and second edges of the diaphragm.

16. The implantable medical device lead of claim 13 , wherein the shoulder comprises a flange extending laterally outward from the outer wall of the housing.

17. The implantable medical device lead of claim 16 , wherein housing has a rectangular cross-section comprising a top side and a bottom side, the top side corresponding to the flat portion formed by the inner shell and the outer layer.

18. The implantable medical device lead of claim 13 , wherein the thickness of the outer layer along the shoulder is greater than the thickness of the outer layer along a portion of the outer wall of the housing opposite the flat portion.

19. The implantable medical device lead of claim 18 , wherein the thickness of the inner shell along the shoulder is approximately equal to the thickness of the inner shell along the portion of the outer wall of the housing opposite the flat portion.

20. The implantable medical device lead of claim 13 , wherein the thickness of the inner shell along the shoulder is greater than the thickness of the inner shell along a portion of the outer wall of the housing opposite the flat portion.

21. The implantable medical device lead of claim 20 , wherein the thickness of the outer layer along the shoulder is approximately equal to the thickness of the outer layer along the portion of the outer wall of the housing opposite the flat portion.

22. The implantable medical device lead of claim 13 , wherein the thickness of the outer layer along the shoulder is greater than the thickness of the outer layer along a portion of the outer wall of the housing opposite the flat portion, and the thickness of the inner shell along the shoulder is greater than the thickness of the inner shell along the portion of the outer wall of the housing opposite the flat portion.

23. The implantable medical device lead of claim 22 , wherein the thickness of the outer layer along the shoulder is equal to the thickness of the inner shell along the shoulder.

24. The implantable medi

Assignees

• Flo Daniel S
• Carney James K
• Mothilal Kamal Deep
• Schell Jon D
• Medtronic Inc

Inventors

• Flo Daniel S
• Carney James K
• Mothilal Kamal Deep
• Schell Jon D

Classifications

• A61B2562/162

  Capsule shaped sensor housings, e.g. for swallowing or implantation · CPC title

• A61B5/6876

  Blood vessel · CPC title

• G01L19/146

  using flexible element between the transducer and the support · CPC title

• A61B2562/18

  Shielding or protection of sensors from environmental influences, e.g. protection from mechanical damage · CPC title

• A61B5/6861 Primary

  Capsules, e.g. for swallowing or implanting · CPC title