Anti-flutter check valve

Patent metadata

Field	Value
Publication number	US-9651160-B2
Application number	US-201414495287-A
Country	US
Kind code	B2
Filing date	Sep 24, 2014
Priority date	Sep 24, 2014
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A check valve includes a housing, a hinge pin connected to the housing, and a flap with a cam surface having stability points, the flap rotatably connected to the hinge pin. The check valve further includes a stop pin connected to the housing, a spring mounted on the stop pin, the spring having an arm, and a detent element mounted on the arm of the spring. The spring urges the detent element to be in contact with the cam surface and the flap is stable when the detent element is located at one of the plurality of stability points.

First claim

The invention claimed is:

1. A check valve comprising:
a housing:
a hinge pin connected to the housing;
a flap with a cam surface having a plurality of stability points, the flap rotatably connected to the hinge pin;
a stop pin connected to the housing;
a spring mounted on the stop pin, the spring having an arm;
a detent element mounted on the arm of the spring, wherein the spring urges the detent element to be in contact with the cam surface and wherein the flap is stable when the detent element is located at one of the plurality of stability points; and
a plurality of stop bars adjacent to the stop pin, the plurality of stop bars configured to be in contact with the flap when the flap is in a fully open position.

2. The check valve of claim 1 , wherein the cam surface is removable from the flap.

3. The check valve of claim 2 , wherein the cam surface comprises rubber or plastic.

4. The check valve of claim 3 , wherein the cam surface attaches to the flap with glue, a screw, or a rivet.

5. The check valve of claim 1 , wherein the detent element comprises a roller, a bearing, or a low friction slider.

6. The check valve of claim 1 , wherein the plurality of stability points comprises a first stability point and a second stability point.

7. The check valve of claim 6 , wherein the first stability point is configured such that the flap is stable at 0 degrees and the second stability point is configured such that the flap is stable at 77 degrees.

8. The check valve of claim 7 , wherein the plurality of stability points further comprises a third stability point.

9. The check valve of claim 8 , wherein the third stability point is configured such that the flap is stable at 60 degrees.

10. The check valve of claim 1 , and further comprising:
a second flap with a second cam surface having a second plurality of stability points, the second flap rotatably connected to the hinge pin;
a second spring mounted on the stop pin, the second spring having a second arm; and
a second detent element mounted on the second arm of the second spring, wherein the second spring urges the second detent element to be in contact with the second cam surface and wherein the second flap is stable when the second detent element is located at one of the second plurality of stability points.

11. An actuation mechanism comprising:
a hinge pin;
a flap with a cam surface having a plurality of stability points, the flap rotatably connected to the hinge pin;
a spring having an arm, wherein the spring is mounted on a pin that is spaced from and parallel to the hinge pin;
a detent element mounted on the arm of the spring, wherein the spring urges the detent element to be in contact with the cam surface and wherein the flap is stable when the detent element is located at one of the plurality of stability points; and
a plurality of stop bars adjacent to the pin that is spaced from and parallel to the hinge pin, the plurality of stop bars configured to be in contact with the flap when the flap is in a fully open position.

12. The actuation mechanism of claim 11 , wherein the plurality of stability points comprises a first stability point, a second stability point, and a third stability point.

13. The actuation mechanism of claim 12 , wherein the first stability point is configured such that the flap is stable at 0 degrees, the second stability point is configured such that the flap is stable at 60 degrees, and the third stability point is configured such that the flap is stable at 77 degrees.

14. The actuation mechanism of claim 11 , and further comprising:
a second flap with a second cam surface having a second plurality of stability points, the second flap rotatably connected to the hinge pin;
a second spring having a second arm; and
a second detent element mounted on the second arm of the second spring, wherein the second spring urges the second detent element to be in contact with the second cam surface and wherein the second flap is stable when the second detent element is located at one of the second plurality of stability points.

15. An actuation mechanism comprising:
a hinge pin;
a first flap with a first cam surface having a first plurality of stability points, the flap rotatably connected to the hinge pin;
a first spring having an arm;
a first detent element mounted on the arm of the first spring, wherein the first spring urges the first detent element to be in contact with the first cam surface and wherein the first flap is stable when the first detent element is located at one of the first plurality of stability points;
a second flap with a second cam surface having a second plurality of stability points, the second flap rotatably connected to the hinge pin;
a second spring having a second arm; and

a second detent element mounted on the second arm of the second spring, wherein the second spring urges the second detent element to be in contact with the second cam surface and wherein the second flap is stable when the second detent element is located at one of the second plurality of stability points.

16. The actuation mechanism of claim 15 , wherein each of the first and second plurality of stability points comprises a first stability point, a second stability point, and a third stability point.

17. The actuation mechanism of claim 16 , wherein the first stability points are configured such that the first and second flaps are stable at 0 degrees, the second stability points are configured such that the first and second flaps are stable at 60 degrees, and the third stability points are configured such that the first and second flaps are stable at 77 degrees.

18. A check valve comprising:
a housing;
a hinge pin connected to the housing;
a flap with a cam surface having a plurality of stability points, the flap rotatably connected to the hinge pin, wherein the cam surface is removable from the flap;
a stop pin connected to the housing;
a spring mounted on the stop pin, the spring having an arm; and
a detent element mounted on the arm of the spring, wherein the spring urges the detent element to be in contact with the cam surface and wherein the flap is stable when the detent element is located at one of the plurality of stability points.

19. A check valve comprising:
a housing;
a hinge pin connected to the housing;
a flap with a cam surface having a plurality of stability points, the flap rotatably connected to the hinge pin;
a stop pin connected to the housing;
a spring mounted on the stop pin, the spring having an arm; and
a detent element mounted on the arm of the spring, wherein the spring urges the detent element to be in contact with the cam surface and wherein the flap is stable when the detent element is located at one of the plurality of stability points and wherein the detent element comprises a roller, a bearing, or a low friction slider.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Barone Michael R

Classifications

• F16K15/038

  having a common hinge · CPC title

• F16K15/033 Primary

  spring-loaded · CPC title