Decontamination device and method thereof

• US 5,935,339 A
• Filed: 12/13/1996
• Issued: 08/10/1999
• Est. Priority Date: 12/14/1995
• Status: Expired due to Fees

• Current Assignee: Iowa State University Research Foundation Incorporated (Iowa State University)
• Original Assignee: Iowa State University
• Inventors: Vesenka, James, Henderson, Eric
• Primary Examiner(s): Warden, Jill
• Assistant Examiner(s): Markoff, Alexander
• Application Number:
  US08/766,871
• Time in Patent Office: 970 Days
• Field of Search: 422/186.07, 422/186.05, 134/1.1-1.2, 134/1.3
• US Class Current: 134/1
• CPC Class Codes: B08B 7/0035 by radiant energy, e.g. UV, laser, light beam or the like
• CPC Class Codes: G01Q 30/20 Sample handling devices or methods

Abstract

One embodiment of a decontamination device for a surface, such as a probe, and method thereof in accordance with the present invention includes a first electrode, a second electrode, and a transformer. The first electrode comprises a housing with an opening and one end of the second electrode is positioned in the opening. The second electrode has an elongated-shape which tapers to a point at the one end adjacent to the opening. The transformer is mounted in the housing and has first and second pairs of leads. One of the second pair of leads is coupled to the first electrode and the other of the second pair of leads is coupled to the second electrode. A surface to be cleaned is placed adjacent to the point and the device is turned on for a preset period of time to generate free radicals, such as ozone plasma, which remove debris build-up on the surface.

Claims

1. A method for decontaminating a portion of an object, the method comprising the steps of:

providing a housing with a first electrode positioned inside the housing and spaced a first distance from an opening in a plate which forms a second electrode and is located on the housing, the first electrode having an elongated-shape which tapers to a point adjacent the opening;

coupling power to the first and second electrodes;

generating a localized region of free radicals adjacent to the point of the first electrode; and

subjecting only the portion of the object to be decontaminated in the region of the free radicals for a preset period of time to decontaminate that portion of the object without degrading adjacent portions of the object.

2. The method according to claim 1 wherein the preset period of time ranges from thirty seconds to one-hundred-and-twenty seconds.

3. The method according to claim 1 wherein the first distance is about 1/16 of an inch to 1/4 of an inch.

4. The method according to claim 1 further comprising adjusting the spacing between the first electrode and the second electrode with an adjustment assembly to adjust the generation of free radicals.

5. A method for decontaminating a portion of an object, the method comprising the steps of:

providing a housing with an elongated section which has a pair of ends with an opening at one of the ends of the elongated section of the housing, first and second electrodes being insulated except for opposing ends and mounted in and extending along the length of the elongated section of the housing, one end of the first and second electrodes located in the opening in the one end of the elongated section and spaced a first distance apart;

coupling power to the first and second electrodes;

generating a localized region of free radicals adjacent to the one and of the elongated section of the housing; and

positioning the one end of the elongated section of the housing adjacent to only the portion of the object to be decontaminated for a preset period of time to decontaminate that portion of the object without degrading adjacent portions of the object.

6. The method according to claim 5 wherein the preset period of time ranges from thirty seconds to one-hundred-and-twenty seconds.

7. The method according to claim 5 wherein the first distance is about 1/16 of an inch to 1/4 of an inch.

8. The method according to claim 5 wherein the power is coupled to the first electrode and the second electrodes through a transformer located in a handle of the wand, the handle is connected adjacent to an opposing end of the elongated section.

9. A method for decontaminating a portion of an object, the method comprising the steps of:

providing a portable housing with a first electrode and a second electrode, the first electrode positioned inside the housing and located a first distance from a second electrode;

coupling the power to the first electrode and the second electrode;

generating a region of free radicals adjacent to the first electrode;

adjusting the first distance between the first electrode and the second electrode with an adjustment assembly to adjust the generation of free radicals; and

subjecting only the portion of the object to be decontaminated in the region of free radicals for a preset period of time to decontaminate that portion of the object without degrading adjacent portions of the object.

10. The method according to claim 9 wherein the preset period of time ranges from thirty seconds to one-hundred-and-twenty seconds.

11. The method according to claim 9 wherein the first distance is about 1/16 of an inch to 1/4 of an inch.

12. The method according to claim 9 wherein the power is coupled to the first electrode and the second electrodes through a transformer.

13. The method according to claim 9 wherein the first electrode has an elongated-shape which tapers to a point adjacent an opening in a plate which forms the second electrode.