Pressure sensor having a front seal

Patent metadata

Field	Value
Publication number	US-9964460-B2
Application number	US-201615143843-A
Country	US
Kind code	B2
Filing date	May 2, 2016
Priority date	Feb 24, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

This disclosure provides example methods, devices, and systems for a sensor having a front seal. In one embodiment, a system may comprise a sensing element; a header coupled to the sensing element; a housing coupled to the header; a screen joined to an adaptor and coupled to the housing, wherein a first gap separates the adapter and the sensing element and a second gap separates the adapter and the header; and wherein a stress applied at a front surface of the adapter is transferred to the housing, and the first gap is used to isolate the sensing element from the stress and the second gap is used to isolate the header from the stress.

First claim

What is claimed is:

1. A system, comprising:
a sensing element;
a header coupled to the sensing element;
a housing coupled to the header;
an adaptor joined with a screen, the adapter coupled to the housing;
a first cavity disposed between the screen and the sensing element;
a first gap separating the adapter and the sensing element, the first gap defining a second cavity;
a second gap separating the adapter and the header;
wherein the screen in combination with the first cavity and the second cavity form a Helmholtz resonator, and wherein the adaptor joined with the screen provides dimensional tolerance control of at least the first cavity and the second cavity.

2. The system of claim 1 , wherein the adaptor is not connected to the sensing element.

3. The system of claim 1 , wherein the adaptor is not in contact with the sensing element.

4. The system of claim 1 , wherein the first gap is less than 0.015 inches.

5. The system of claim 1 , wherein the first gap is in the range of 0.001 inches to 0.015 inches.

6. The system of claim 1 , wherein the adaptor is not connected to the header.

7. The system of claim 1 , wherein the header is not in contact with the adaptor.

8. The system of claim 1 , wherein the second gap is less than 0.040 inches.

9. The system of claim 1 , wherein the second gap is in the range of 0.005 inches to 0.040 inches.

10. The system of claim 1 , wherein the sensing element is a piezoresistive leadless sensor.

11. The system of claim 1 , wherein the sensing element is used to measure an environmental condition.

12. The system of claim 11 , wherein the environmental condition is pressure.

13. The system of claim 1 , wherein the adapter and screen are disposed around and define a recess, and the sensing element is disposed in the recess.

14. The system of claim 13 , wherein a shape and a size of the recess is about equivalent to a corresponding shape and size of the sensing element.

15. The system of claim 14 , wherein the shape of the recess is square.

16. The system of claim 1 , wherein a stress applied at a front surface of the adapter and screen is transferred to the housing, and the first gap is used to isolate the sensing element from the stress and the second gap is used to isolate the header from the stress.

17. The system of claim 1 , wherein a third cavity is associated with the second gap; and wherein the adapter and screen in combination with the first cavity, the second cavity and the third cavity form a Helmholtz resonator.

18. The system of claim 17 , wherein a response time of the sensing element is less than about fifty microseconds.

19. The system of claim 1 , wherein the front surface of the adapter and screen is coupled to a mating surface.

20. The system of claim 1 , wherein the adaptor joined with the screen comprises a one-piece component.

Assignees

• Kulite Semiconductor Products Inc

Inventors

• Derosa Louis
• Gardner Robert
• Vandeweert Joseph
• Hurst Adam

Classifications

• G01L19/145

  with stress relieving means · CPC title

• G01L9/0052 Primary

  of piezoresistive elements (circuits therefor G01L9/06) · CPC title

• G01L19/14 Primary

  Housings {(G01L19/0007, G01L19/0084, G01L19/0092, G01L19/04, G01L19/06 take precedence)} · CPC title

• F01N2560/08

  the means being a pressure sensor · CPC title

• G01L19/06

  Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa · CPC title