Shape memory alloy valve

Patent metadata

Field	Value
Publication number	US-9651158-B2
Application number	US-201514938456-A
Country	US
Kind code	B2
Filing date	Nov 11, 2015
Priority date	Mar 12, 2013
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A valve apparatus employs a shape memory alloy. In another aspect, a shape memory member acts as a lock or trigger in combination with a separate actuator or spring to move a valve. Still another aspect uses an externally mounted shape memory member to rotate a valve if an unsafe condition causes movement of the member.

First claim

The invention claimed is:

1. A valve apparatus comprising:
a fluid valve;
a housing including an internal fluid-carrying passageway within which the fluid valve is located, the housing further including an external engagement surface;
a shaft attached to and operably moving with the fluid valve, the shaft having an abutment surface located external to the housing; and
a shape memory member located external to the housing and engaging the engagement surface of the housing in a first operating condition, the shape memory member also engaging the abutment surface of the shaft in the first operating condition, and the shape memory member disengaging at least one of the surfaces when in a different operating condition to allow the fluid valve to move, the operating conditions being changeable due to a change of at least one of: (a) temperature, and (b) electrical current.

2. The valve apparatus of claim 1 , further comprising a spring being a separate part from the shape memory member, the spring automatically changing an orientation of the fluid valve when the shape memory member is heated to disengage the abutment surface of the shaft.

3. The valve apparatus of claim 2 , wherein the spring is a torsion spring which rotates the fluid valve within the housing.

4. The valve apparatus of claim 1 , wherein the shape memory member has a substantially inverted U-shape in at least one of the operating conditions, and the shape memory member is free of a coiled loop.

5. The valve apparatus of claim 1 , wherein the shape memory member is a wire which is environmentally heat activated without use of electricity, such that the shape memory member automatically releases the fluid valve for automatic movement if a fire or dangerous temperature is present.

6. The valve apparatus of claim 1 , wherein the housing further includes a polymeric quick connector with spaced apart ridges, a collar centrally projects from the housing concentric with the shaft, and the collar has the engagement surface thereon.

7. The valve apparatus of claim 1 , wherein the engagement surface of the housing and the abutment surface of the shafts are part of grooves which are aligned when engaged by the shape memory member.

8. The valve apparatus of claim 1 , wherein the fluid valve is a rotating butterfly valve with flat closing faces.

9. The valve apparatus of claim 1 , wherein the fluid valve is a rotating and generally spherical ball valve with a bore therethrough.

10. A valve apparatus comprising:
a fluid valve;
a housing including an internal fluid-carrying passageway within which the fluid valve is located, the housing further including an external engagement surface;
a shaft attached to and operably moving with the fluid valve, the shaft having an abutment surface located external to the housing; and
a shape memory member located external to the housing and engaging the engagement surface of the housing in a first operating condition, the shape memory member also engaging the abutment surface of the shaft in the first operating condition, and the shape memory member disengaging at least one of the surfaces when in a different operating condition to allow the fluid valve to move.

11. The valve apparatus of claim 10 , further comprising a spring being a separate part from the shape memory member, the spring automatically changing an orientation of the fluid valve when the shape memory member is heated to disengage the abutment surface of the shaft.

12. The valve apparatus of claim 11 , wherein the spring is a torsion spring which rotates the fluid valve within the housing.

13. The valve apparatus of claim 10 , wherein the shape memory member has a substantially inverted U-shape in at least one of the operating conditions, and the shape memory member is free of a coiled loop.

14. The valve apparatus of claim 10 , wherein the shape memory member is a wire which is environmentally heat activated without use of electricity, such that the shape memory member automatically releases the fluid valve for automatic movement if a fire or dangerous temperature is present.

15. The valve apparatus of claim 10 , wherein the housing further includes a polymeric quick connector with spaced apart ridges, a collar centrally projects from the housing concentric with the shaft, and the collar has the engagement surface thereon.

16. The valve apparatus of claim 10 , wherein the engagement surface of the housing and the abutment surface of the shafts are part of grooves which are aligned when engaged by the shape memory member.

17. The valve apparatus of claim 10 , wherein the fluid valve is a rotating butterfly valve with flat closing faces.

18. The valve apparatus of claim 10 , wherein the fluid valve is a rotating and generally spherical ball valve with a bore therethrough.

19. A valve apparatus comprising:
a fluid valve;
a polymeric connector body including an internal fluid-carrying passageway within which the fluid valve is located, the polymeric connector body further including an external engagement surface;
an abutment surface moveable with the valve;
a shape memory member located external to the polymeric connector body and engaging the engagement surface of the polymeric connector body in a first operating condition, the shape memory member also engaging the abutment surface in the first operating condition, and the shape memory member disengaging at least one of the surfaces when in a different operating condition to allow the fluid valve to move, the operating conditions being changeable due to a change of at least one of: (a) temperature, and (b) electrical current; and
a spring operably rotating the fluid valve within the connector body if there is a change in the operating conditions.

20. The valve apparatus of claim 19 , wherein the shape memory member is a wire which is environmentally heat activated without use of electricity, such that the shape memory member automatically releases the fluid valve for automatic movement if a fire or dangerous temperature is present.

Assignees

• A Raymond & Cie
• A Raymond Et Cie

Inventors

• Jackson Jr Nicholas

Classifications

• G05D23/1852

  with sensing element expanding and contracting in response to change of temperature · CPC title

• F16K17/386 Primary

  the closure members being rotatable or pivoting · CPC title

• F16K25/005

  Particular materials for seats or closure elements · CPC title

• F16K31/003

  operated without a stable intermediate position, e.g. with snap action (F16K31/56 takes precedence) · CPC title

• F16K1/221 Primary

  specially adapted operating means therefor (operating means per se F16K31/00) · CPC title