BIMETALLIC VALVE LIMITATION

• US 20160047482A1
• Filed: 03/25/2013
• Published: 02/18/2016
• Est. Priority Date: 03/25/2013
• Status: Abandoned Application

• Current Assignee: Pierburg Pump Technology Gmbh (Rheinmetall AG)
• Original Assignee: Pierburg Pump Technology Gmbh (Rheinmetall AG)
• Inventors: KUHNEKATH, ANDREAS
• Application Number:
  US14/779,571
• Publication Number:
  US 20160047482A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F04B 39/1073 the members being reed valves
• CPC Class Codes: F04B 53/1042 by means of a flexible connection
• CPC Class Codes: F04B 53/1085 having means for limiting the opening height F04B53/101 and F04B53/1035 take precedence
• CPC Class Codes: F16K 15/16 with tongue-shaped laminae
• CPC Class Codes: F16K 31/002 actuated by temperature variation thermo-electric F16K31/025
• CPC Class Codes: Y10T 137/7737 Thermal responsive
• CPC Class Codes: Y10T 137/7892 With stop

Abstract

A displacement pump for automobiles includes a pump chamber configured to have a lubricant flow therethrough, a check valve configured to control an access to the pump chamber, and a valve travel limiter. The check valve comprises a valve opening and a valve body configured to cover the valve opening. The valve limiter comprises a mechanical temperature element which is configured to increase a valve travel of the valve body as a temperature decreases, and to reduce the travel distance of the valve body as the temperature increases.

Claims

1-10. -10. (canceled)

11. A displacement pump for automobiles, the displacement pump comprising:

a pump chamber configured to have a lubricant flow therethrough;

a check valve configured to control an access to the pump chamber, the check valve comprising a valve opening and a valve body configured to cover the valve opening; and

a valve travel limiter comprising a mechanical temperature element which is configured to increase a valve travel of the valve body as a temperature decreases and to reduce the travel distance of the valve body as the temperature increases.

12. The displacement pump as recited in in claim 11, wherein the valve travel limiter is formed by the mechanical temperature element.

13. The displacement pump as recited in in claim 11, wherein the valve body is a leaf spring.

14. The displacement pump as recited in claim 11, wherein the mechanical temperature element is formed by a bimetallic leaf.

15. The displacement pump as recited in claim 14, wherein the mechanical temperature element is formed by a shape-memory material body.

16. The displacement pump as recited in claim 15, wherein the shape-memory material body is nitinol.

17. The displacement pump as recited in claim 14, wherein the mechanical temperature element comprises a wax element.

18. The displacement pump as recited in claim 11, wherein,

the pump chamber comprises a pump chamber wall, and

the valve body and the valve travel limiter are each formed as a tongue with one end of the tongue being fixed on the pump chamber wall.

19. The displacement pump as recited in claim 11, further comprising a pump chamber outlet valve,

wherein the check valve is assigned to the pump chamber outlet valve.

20. The displacement pump as recited in claim 11, wherein the displacement pump is an oil-lubricated vacuum pump.

21. The displacement pump as recited in claim 11, wherein the displacement pump is a lubricant pump.