Device employing gas generating cell for facilitating controlled release of fluid into ambient environment

• US 7,614,568 B2
• Filed: 06/14/2004
• Issued: 11/10/2009
• Est. Priority Date: 08/24/2000
• Status: Expired due to Fees

• Current Assignee: Microlin LLC
• Original Assignee: Microlin LLC
• Inventors: McEvoy, John J., Joshi, Ashok V., Wold, Truman
• Primary Examiner(s): Nguyen; Dinh Q
• Application Number:
  US10/868,203
• Publication Number:
  US 20050023371A1
• Time in Patent Office: 1,975 Days
• Field of Search: 239/337, 239/302, 239/356, 239/362, 239/363, 604/891.1, 604/145, 604/500, 604/502, 222/399
• US Class Current: 239/6
• CPC Class Codes: A61L 9/037 comprising a wick
• CPC Class Codes: A61L 9/122 comprising a fan
• CPC Class Codes: A61L 9/127 comprising a wick

Abstract

A device for controllably releasing a fluid into an ambient environment. According to a particular embodiment of the present invention, the device comprises a housing having a fluid compartment and an orifice compartment disposed adjacent thereto and in fluid communication therewith via an orifice. The fluid compartment contains the fluid for release to the ambient environment. The orifice compartment includes a fluid exit opening covered by a removable sealing element and contains an initial quantity of fluid when the device is in an inactivated state. A fluid restrictor is disposed adjacent the orifice to restrict fluid flow from the fluid compartment into the orifice compartment in the inactivated state. A gas-generating cell is in selective communication with the fluid compartment such that gas generated by the cell is directed into the fluid compartment when the device is in an activated state. A fluid membrane is disposed between the gas-generating cell and the fluid compartment that allows the gas generated by the cell to pass therethrough to the fluid compartment in the activated state while preventing fluid within the fluid container from passing therethrough to the cell in the inactivated state. The device is activated by removing the sealing element to allow the initial quantity of fluid to exit out of the orifice compartment via the fluid exit opening and activating the cell to generate gas and force fluid from the fluid compartment to the orifice compartment and out the fluid exit opening in a controlled manner.

Claims

1. A device for controllably releasing a fluid into an ambient environment, the device comprising:

a housing having a fluid compartment and an orifice compartment disposed adjacent thereto and in fluid communication therewith via an orifice, the fluid compartment containing a predetermined amount of fluid for release to the ambient environment, the orifice compartment including a fluid exit opening covered by a removable membrane and containing a separate predetermined amount of fluid when the device is in an inactivated state;

a fluid restrictor disposed adjacent the orifice to restrict fluid flow from the fluid compartment into the orifice compartment in the inactivated state;

a gas-generating cell in selective communication with the fluid compartment such that gas generated by the cell is directed into the fluid compartment when the device is in an activated state; and

a fluid membrane disposed between the gas-generating cell and the fluid compartment that allows the gas generated by the cell to pass therethrough to the fluid compartment in the activated state while preventing fluid within the fluid container from passing therethrough to the cell in the inactivated state;

wherein the device is activated by removing the sealing element to allow the predetermined amount of fluid in the orifice compartment to exit out of the orifice compartment via the fluid exit opening and activating the cell to generate gas and force the predetermined amount of fluid from the fluid compartment to the orifice compartment and out the fluid exit opening in a controlled manner.

2. The device of claim 1, wherein the fluid membrane comprises an impermeable seal that prevents gas generated from the cell to pass therethrough into the fluid compartment until sufficient pressure is generated to break the impermeable seal.

3. The device of claim 1, wherein the fluid membrane is a selectively permeable membrane that allows gas generated from the cell to pass therethrough into the fluid compartment while preventing fluid within the fluid container from passing therethrough to the cell.

4. The device of claim 1, further comprising an emanating system disposed adjacent the fluid exit opening to receive fluid from the fluid compartment in the activated state and deliver said fluid into the ambient environment.

5. The device of claim 1, wherein the removable membrane is a removable cap.

6. The device of claim 1, wherein the removable membrane is a pierceable membrane.

7. The device of claim 6, further comprising a moveable piercing element disposed adjacent the pierceable membrane to pierce the membrane when the device is activated.

8. A device for controllably releasing a fluid into an ambient environment, the device comprising:

a housing including a gas compartment, a fluid compartment and an orifice compartment;

the fluid compartment containing a predetermined amount of fluid for release to the ambient environment and in fluid communication with the orifice compartment via an orifice;

the orifice compartment including a fluid exit opening covered by a removable membrane and containing a separate predetermined amount of fluid when the device is in an inactivated state;

the gas compartment containing a gas-generating cell in selective communication with the fluid compartment such that gas generated by the cell is directed into the fluid compartment and applies pressure to the predetermined amount of fluid therein when the device is in an activated state;

a fluid restrictor disposed adjacent the orifice to restrict fluid flow from the fluid compartment into the orifice compartment in the inactivated state; and

a fluid membrane disposed between the gas-generating cell and the fluid compartment that allows the gas generated by the cell to pass therethrough to the fluid compartment in the activated state while preventing fluid within the fluid container from passing therethrough to the cell in the inactivated state; and

a fluid emanator disposed adjacent the fluid exit opening to facilitate delivery of fluid to the ambient environment;

wherein the device is activated by removing the removable membrane to allow the predetermined amount of fluid in the orifice compartment to exit out of the orifice compartment via the fluid exit opening to the emanator and activating the cell to generate gas and force fluid from the fluid compartment to the orifice compartment and out the fluid exit opening to the emanator in a controlled manner.

9. The device of claim 8, wherein the fluid membrane comprises an impermeable seal that prevents gas generated from the cell to pass therethrough into the fluid compartment until sufficient pressure is generated to break the impermeable seal.

10. The device of claim 8, wherein the fluid membrane is a selectively permeable membrane that allows gas generated from the cell to pass therethrough into the fluid compartment while preventing fluid within the fluid container from passing therethrough to the cell.

11. The device of claim 8, wherein the removable membrane is a removable cap.

12. The device of claim 8, wherein the removable membrane is a pierceable membrane.

13. The device of claim 12, further comprising a moveable piercing element disposed adjacent the pierceable membrane to pierce the membrane when the device is activated.

14. A device for controllable releasing a fluid into an ambient environment, the device comprising:

a housing including a gas compartment, a fluid compartment containing a predetermined amount of fluid for release to the ambient environment, and an orifice compartment in fluid communication with the fluid compartment, the orifice compartment including a fluid exit opening covered by a removable membrane and containing a separate predetermined amount of fluid when the device is in an inactivated state;

a gas-generating cell disposed within the cell compartment;

means for holding and sealing the gas generating cell within the cell compartment such that gas generated by the cell when the device is in an activated state applies pressure to the predetermined quantity of fluid in the fluid compartment;

means for protecting the gas generating cell from the fluid in the fluid compartment;

means for preventing fluid in the fluid compartment from flowing into the orifice compartment in the inactivated state;

means for allowing fluid in the fluid compartment to flow into the orifice compartment and out through the fluid exit opening in the activated state; and

a fluid restrictor disposed adjacent the orifice to restrict fluid flow from the fluid compartment into the orifice compartment in the inactivated state;

wherein the device is activated by removing the removable membrane to allow the predetermined amount of fluid to exit out of the orifice compartment via the fluid exit opening to the emanator and activating the cell to generate gas and force fluid from the fluid compartment to the orifice compartment and out the fluid exit opening in a controlled manner.

15. A device for controllably releasing a fluid into an ambient environment, the device comprising:

a housing having a fluid compartment and an orifice compartment disposed adjacent thereto and in fluid communication therewith via an orifice, the fluid compartment containing a fluid for release to the ambient environment, the orifice compartment including a fluid exit opening;

a fluid restrictor disposed adjacent the orifice to restrict fluid flow from the fluid compartment into the orifice compartment in the inactivated state;

a gas-generating cell in selective communication with the fluid compartment such that gas generated by the cell is directed into the fluid compartment when the device is in an activated state;

a fluid membrane disposed between the gas-generating cell and the fluid compartment that allows the gas generated by the cell to pass therethrough to the fluid compartment in the activated state while preventing fluid within the fluid container from passing therethrough to the cell in the inactivated state; and

a gas membrane disposed between the gas-generating cell and the fluid compartment that prevents vapor from the fluid compartment to pass therethrough to the gas generating cell;

wherein the device is activated by removing the sealing element to allow the initial quantity of fluid to exit out of the orifice compartment via the fluid exit opening and activating the cell to generate gas and force fluid form the fluid compartment to the orifice compartment and out the fluid exit opening in a controlled manner.

16. The device of claim 15, wherein the fluid membrane comprises an impermeable seal that prevents gas generated from the cell to pass therethrough into the fluid compartment until sufficient pressure is generated to break the impermeable seal.

17. The device of claim 15, wherein the fluid membrane is a selectively permeable membrane that allows gas generated from the cell to pass therethrough into the fluid compartment while preventing fluid within the fluid compartment from passing therethrough to the cell.

18. The device of claim 15, further comprising an emanating system disposed adjacent the fluid exit opening to receive the fluid from the fluid compartment in the activated state and deliver the fluid into the ambient environment.

19. The device of claim 15, wherein the removable membrane is a removable cap.

20. The device of claim 15, wherein the removable membrane is a pierceable membrane.

21. The device of claim 20, further comprising a moveable piercing element disposed adjacent the pierceable membrane to pierce the membrane when the device is activated.

22. A device for controllably releasing a fluid into an ambient environment, the device comprising:

a housing including a gas compartment, a fluid compartment and an orifice compartment;

the fluid compartment containing a fluid for release to the ambient environment and in fluid communication with the orifice compartment via an orifice;

the orifice compartment including a fluid exit opening covered by a removable membrane and containing an initial quantity of fluid when the device is in an inactivated state;

the gas compartment containing a gas-generating cell in selective communication with the fluid compartment such that gas generated by the cell is directed into the fluid compartment and applies pressure directly to the fluid therein when the device is in an activated state;

a fluid restrictor disposed adjacent the orifice to restrict fluid flow from the fluid compartment into the orifice compartment in the inactivated state;

a fluid membrane disposed between the gas-generating cell and the fluid compartment that allows the gas generated by the cell to pass therethrough to the fluid compartment in the activated state while preventing fluid within the fluid container from passing therethrough to the cell in the inactivated state;

a gas membrane disposed between the gas-generating cell and the fluid compartment that prevents vapor from the fluid compartment to pass therethrough to the gas generating cell; and

a fluid emanator disposed adjacent the fluid exit opening to facilitate delivery of the fluid to the ambient environment;

wherein the device is activated by removing the removable membrane to allow the initial quantity of fluid to exit out of the orifice compartment via the fluid exit opening to the emanator and activating the cell to generate gas and force fluid from the fluid compartment to the orifice compartment and out the fluid exit opening to the emanator in a controlled manner.

23. The device of claim 22, wherein the fluid membrane comprises an impermeable seal that prevents gas generated from the cell to pass therethrough into the fluid compartment until sufficient pressure is generated to break the impermeable seal.

24. The device of claim 22, wherein the fluid membrane is a selectively permeable membrane that allows gas generated from the cell to pass therethrough into the fluid compartment while preventing fluid within the fluid container from passing therethrough to the cell.

25. The device of claim 22, wherein the removable membrane is a removable cap.

26. The device of claim 22, wherein the removable membrane is a pierceable membrane.

27. The device of claim 26, further comprising a moveable piercing element disposed adjacent the pierceable membrane to pierce the membrane when the device is activated.

28. A device for controllable releasing a fluid into an ambient environment, the device comprising:

a housing including a gas compartment, a fluid compartment containing a fluid for release to the ambient environment, and an orifice compartment in fluid communication with the fluid compartment, the orifice compartment including a fluid exit opening covered by a removable membrane and containing an initial quantity of fluid when the device is in an inactivated state;

a gas-generating cell disposed within the gas compartment;

means for holding and sealing the gas generating cell within the cell compartment such that gas generated by the cell when the device is in an activated state applies pressure directly to the fluid in the fluid compartment;

means for protecting the gas generating cell from the fluid in the fluid compartment;

means for protecting the gas generating cell from vapor in the fluid compartment;

means for preventing fluid in the fluid compartment from flowing into the orifice compartment in the inactivated state;

means for allowing fluid in the fluid compartment to flow into the orifice compartment and out through the fluid exit opening in the activated state; and

a fluid restrictor disposed adjacent the orifice to restrict fluid flow from the fluid compartment into the orifice compartment in the inactivated state;

wherein the device is activated by removing the removable membrane to allow the initial quantity of fluid to exit out of the orifice compartment via the fluid exit opening to the emanator and activating the cell to generate gas and force fluid from the fluid compartment to the orifice compartment and out the fluid exit opening in a controlled manner.

29. A method for controllable releasing a fluid into an ambient environment, the method comprising:

providing a device comprising a housing including a gas compartment, a fluid compartment containing the fluid for release to the ambient environment, and an orifice compartment in fluid communication with the fluid compartment, the orifice compartment including a fluid exit opening covered by a removable membrane, said gas compartment comprising a gas-generating cell;

protecting the gas generating cell from the fluid in the fluid compartment;

protecting the gas generating cell from vapor in the fluid compartment;

restricting fluid flow from the fluid compartment into the orifice compartment in an inactivated state;

removing the removable membrane to allow an initial quantity of fluid to exit out of the orifice compartment via the fluid exit opening to the emanator;

activating the cell to generate gas; and

directing the gas into direct communication with the fluid thereby forcing fluid from the fluid compartment to the orifice compartment and out the fluid exit opening in a controlled manner.