Gas valve with overtravel

• US 7,624,755 B2
• Filed: 12/09/2005
• Issued: 12/01/2009
• Est. Priority Date: 12/09/2005
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Konecny, Pavel, Benda, Jiri
• Primary Examiner(s): Lee; Kevin L
• Application Number:
  US11/164,906
• Publication Number:
  US 20070131286A1
• Time in Patent Office: 1,453 Days
• Field of Search: 137/637, 137/613, 137/554, 137/516.25, 137/516.27, 137/516.29, 251/363, 251/359, 251/333, 251/64, 251/324
• US Class Current: 137/554
• CPC Class Codes: F16K 1/425 Attachment of the seat to the housing by plastical deformation, e.g. valve seat or housing being plastically deformed during mounting
• CPC Class Codes: F16K 1/443 the seats being in series
• CPC Class Codes: F16K 27/029 Electromagnetically actuated valves
• CPC Class Codes: Y10T 137/7867 Sequential
• CPC Class Codes: Y10T 137/7868 Resilient gasket
• CPC Class Codes: Y10T 137/8242 Electrical
• CPC Class Codes: Y10T 137/87917 Flow path with serial valves and/or closures

Abstract

A gas valve may include a valve body and a valve member disposed within the valve body. A resilient sealing ring may be disposed within the valve body such that the valve member achieves a closed position when the valve member contacts the resilient sealing ring. In some instances, a gas valve may include both an upper resilient sealing ring and a lower resilient sealing ring. The upper resilient sealing ring and the lower resilient sealing ring may both permit overtravel.

Claims

1. A gas valve comprising:

a valve body;

a valve member disposed within the valve body, the valve member movable between an open position in which gas flow is permitted through the gas valve and a closed position in which gas flow is not permitted through the gas valve; and

a resilient sealing ring disposed between the valve member and the valve body, the resilient sealing ring comprising an annular sealing bead and a portion secured to the valve body, the annular sealing bead being spaced apart from a valve body surface when the valve member is in the open position, the valve member moves into contact with the annular sealing bead when the valve member initially reaches its closed position, the annular sealing bead moving into contact with the valve body surface when the valve member exhibits overtravel in moving beyond the position in which the valve member initially reaches its closed position.

2. The gas valve of claim 1, wherein the resilient sealing ring further comprises a flexible portion adapted to permit the scaling bead to move in response to contact with the valve body or the valve member.

3. A gas valve comprising:

a valve body having a valve cavity, wherein the valve cavity is defined by a valve cavity wall, wherein the valve cavity wall includes a side wall surface and an inward extending surface;

a valve member disposed within the valve cavity, wherein the valve member includes a side wall and an outwardly extending surface, the valve member is movable between an open position and a closed position; and

a resilient sealing ring having a sealing bead, a securement portion, and a flexible portion extending between the sealing bead and the securement portion, the securement portion being secured to the side wall of the valve member such that the sealing bead is spaced apart from the outwardly extending surface of the valve member when the valve member is in the open position, wherein the sealing bead moves into contact with the inwardly extending surface of the valve body when the valve member initially reaches its closed position, and the sealing bead moving into contact with the outwardly extending surface of the valve member when the valve member exhibits over travel in moving beyond the position in which the valve member initially reaches its closed position.

4. The gas valve of claim 3, wherein the sealing bead, the securement portion, and the flexible portion each have a maximum dimension in a direction of travel of the valve member, wherein the maximum dimension of the sealing bead is greater than the maximum dimension of the flexible portion.

5. The gas valve of claim 4, wherein the maximum dimension of the securement portion is greater than the maximum dimension of the flexible portion.

6. A gas valve comprising:

a valve body;

a valve member disposed within the valve body, the valve member comprising a first disk and a second disk, the valve member having an open position and a closed position;

a first resilient sealing ring disposed within the valve body proximate the first disk; and

a second resilient sealing ring secured to the valve member proximate the second disk;

wherein when the valve member is in its closed position, the first disk contacts the first resilient sealing ring and the second resilient sealing ring contacts the valve body.

7. The gas valve of claim 6, wherein the first resilient sealing ring and the second resilient sealing ring are each adapted to permit valve member overtravel.

8. The gas valve of claim 6, wherein the first resilient sealing ring comprises a scaling bead adapted to contact the valve member, a securement portion adapted to secure the first resilient sealing ring to the valve body, and a flexible portion extending between the sealing bead and the securement portion.

9. The gas valve of claim 8, wherein the first resilient sealing ring further comprises a securement ring disposed within the securement portion.

10. The gas valve of claim 6, wherein the second resilient sealing ring comprises a sealing bead adapted to contact the valve body, a securement portion adapted to secure the second resilient sealing ring to the valve member, and a flexible portion extending between the sealing bead and the securement portion.

11. The gas valve of claim 10, wherein the second resilient sealing ring further comprises a securement ring disposed within the securement portion.

12. The gas valve of claim 7, wherein the valve member further comprises a shaft extending to a proof of closure switch.

13. The gas valve of claim 12, wherein the proof of closure switch is adapted to provide an indication of valve closure upon overtravel by the valve member.

14. A valve assembly, comprising:

a first balanced port valve comprising;

a first valve chamber;

a first valve member disposed within the first valve chamber, the first valve member having an upper disk and a lower disk; and

a first upper resilient sealing ring secured within the first valve chamber and a first lower resilient sealing ring secured to the first valve member; and

a second balanced port valve comprising;

a second valve chamber;

a second valve member disposed within the second valve chamber, the second valve member having an upper disk and a lower disk; and

a second upper resilient sealing ring secured to the second valve member and a second lower resilient sealing ring secured within the second valve chamber.

15. The valve assembly of claim 14, wherein the first valve member and the second valve member are separately actuated.

16. The valve assembly of claim 14, wherein the first valve member and the second valve member are actuated in tandem.

17. The valve assembly of claim 14, wherein the first valve chamber is in fluid communication with the second valve chamber.

18. The valve assembly of claim 17, wherein the first valve chamber comprises a fluid inlet and the second valve chamber comprises a fluid outlet.

19. The valve assembly of claim 18, wherein the first valve chamber further comprises a pilot light feed.

20. The valve assembly of claim 14, wherein the first valve member further comprises a first shaft extending to a first proof of closure switch.

21. The valve assembly of claim 14, wherein the second valve member further comprises a second shaft extending to a second proof of closure switch.