Pressure sensor, in particular for a braking apparatus

• US 8,671,767 B2
• Filed: 09/22/2011
• Issued: 03/18/2014
• Est. Priority Date: 09/22/2010
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Kaiser, Harry, Arlt, Andreas, Sundermeier, Frieder
• Primary Examiner(s): ALLEN, ANDRE J
• Application Number:
  US13/239,742
• Publication Number:
  US 20120067130A1
• Time in Patent Office: 908 Days
• Field of Search: 73700-756
• US Class Current: 73/756
• CPC Class Codes: B60T 8/368 combined with other mechanical components, e.g. pump units, master cylinders
• CPC Class Codes: G01L 19/0038 being part of the housing other details about the housing G01L19/14
• CPC Class Codes: G01L 19/0084 to the outside of the housing other details about the housing see G01L19/14
• CPC Class Codes: G01L 19/148 Details about the circuit board integration, e.g. integrated with the diaphragm surface or encapsulation

Abstract

A pressure sensor for detecting a pressure of a medium, in particular for a braking apparatus, includes a connecting flange having a fluid channel for connection to the medium which is to be measured, a pressure measuring cell which is arranged at the end of the fluid channel, and a circuit mount, with the pressure measuring cell having a contact surface for making contact. The contact surface is arranged at an angle relative to a center axis of the pressure sensor.

Claims

1. A pressure sensor for detecting a pressure of a medium, the pressure sensor including a center axis extending longitudinally along the pressure sensor, the pressure sensor comprising

a connecting flange having a fluid channel for connection to the medium which is to be measured;

a pressure measuring cell which is arranged at the end of the fluid channel; and

a circuit mount,

wherein the pressure measuring cell has a contact surface for making contact, the contact surface being arranged at an inclined angle relative to the center axis of the pressure sensor.

2. The pressure sensor according to claim 1, wherein the circuit mount has at least one contact area which is arranged approximately at the same inclined angle as the contact surface of the pressure measuring cell relative to the center axis of the pressure sensor.

3. The pressure sensor according to claim 1, wherein contact is made with the pressure measuring cell by bonding contacts.

4. The pressure sensor according to claim 1, wherein the fluid channel in the connecting flange has an angled fluid channel region, wherein the angled fluid channel region is inclined with respect to the center axis of the pressure sensor.

5. The pressure sensor according to claim 1, wherein the circuit mount has a center axis which coincides with the center axis of the pressure sensor.

6. The pressure sensor according to claim 1, further comprising a hole/pin connection between the circuit mount and the connecting flange.

7. The pressure sensor according to claim 1, wherein the circuit mount has a C-shaped recess in which the pressure measuring cell is at least partially accommodated.

8. The pressure sensor according to claim 1, wherein the angle between the center axis of the pressure sensor and the inclined angle of the contact surface of the pressure measuring cell is between 50°

and 70°

.

9. The pressure sensor according to claim 3, further comprising a protective material which is arranged over the bonding contacts.

10. The pressure sensor according to claim 1, further comprising a protective sleeve configured and arranged to protect the pressure sensor.

11. The pressure sensor of claim 1 wherein the pressure sensor is configured to be used in a braking apparatus.

12. The pressure sensor according to claim 8, wherein the angle between the center axis of the pressure sensor and the inclined angle of the contact surface of the pressure measuring cell is approximately 60°

.

13. The pressure sensor according to claim 9, wherein:

the protective material includes an elastic gel, and

the elastic gel is arranged over the contact surface of the pressure measuring cell.

14. The pressure sensor according to claim 4, the contact surface of the pressure measuring cell including a plurality of contacts and the circuit mount including at least one contact area, wherein a connection is made between the plurality of contacts and the contact area of the circuit mount.

15. The pressure sensor according to claim 14, wherein the fluid channel in the connecting flange has a longitudinal channel region coupled to the angled fluid channel region, wherein the longitudinal fluid channel region coincides with the center axis of the pressure sensor.

16. The pressure sensor according to claim 15, the circuit mount including a C-shaped recess in which the pressure measuring cell is at least partially accommodated.

17. The pressure sensor according to claim 1 wherein the inclined angle is neither parallel to nor perpendicular with the center axis.

18. The pressure sensor according to claim 17 wherein the contact surface is configured to support electrical contacts, the electrical contacts being arranged at the inclined angle relative to the center axis of the pressure sensor.

19. A pressure sensor for detecting a pressure of a medium, the pressure sensor including a center axis extending longitudinally along the pressure sensor, the pressure sensor comprising

a connecting flange having an angled fluid channel inclined with respect to the center axis of the pressure sensor for connection to the medium;

a pressure measuring cell which is arranged at the end of the angled fluid channel, the pressure measuring cell including a contact surface inclined at an angle relative to the center axis of the pressure sensor, the contact surface including a plurality of contacts; and

a circuit mount including at least one contact area, wherein a connection is made between at least one of the plurality of contacts and the contact area of the circuit mount.

20. The pressure sensor according to claim 19 wherein the at least one contact area is arranged approximately at the same inclined angle as the contact surface of the pressure measuring cell relative to the center axis of the pressure sensor.

21. The pressure sensor according to claim 20 wherein the circuit mount includes a recess in which the pressure measuring cell is at least partially accommodated.

22. The pressure sensor according to claim 21 wherein the connection between the at least one of the plurality of contacts of the contact surface of the pressure measuring cell and the contact area of the circuit mount is made by at least one bonding wire.