Electrostatic fluid accelerator

• US 7,652,431 B2
• Filed: 05/03/2005
• Issued: 01/26/2010
• Est. Priority Date: 10/16/1998
• Status: Expired due to Fees

• Current Assignee: Tessera, Inc. (Adeia Inc.)
• Original Assignee: Tessera, Inc. (Adeia Inc.)
• Inventors: Krichtafovitch, Igor A.
• Primary Examiner(s): Owens; Douglas W
• Assistant Examiner(s): Alemu; Ephrem
• Application Number:
  US11/119,748
• Publication Number:
  US 20050200289A1
• Time in Patent Office: 1,729 Days
• Field of Search: 96/15, 96/73, 96 75- 80, 96/18, 96/22, 96/24, 361/235, 361/230, 313/360.1, 315/111.91, 315/111.61, 315/506, 315/500
• US Class Current: 315/111.91
• CPC Class Codes: H01J 49/04 Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
• CPC Class Codes: H01T 19/00 Devices providing for corona discharge for charging electrographic elements G03G15/02
• CPC Class Codes: H01T 23/00 Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere

Abstract

An electrostatic fluid accelerator having a multiplicity of closely spaced corona electrodes. The close spacing of such corona electrodes is obtainable because such corona electrodes are isolated from one another with exciting electrodes. Either the exciting electrode must be placed asymmetrically between adjacent corona electrodes or an accelerating electrode must be employed. The accelerating electrode can be either an attracting or a repelling electrode. Preferably, the voltage between the corona electrodes and the exciting electrodes is maintained between the corona onset voltage and the breakdown voltage with a flexible top high-voltage power supply. Optionally, however, the voltage between the corona electrodes and the exciting electrodes can be varied, even outside the range between the corona onset voltage and the breakdown voltage, in to vary the flow of fluid. And, to achieve the greatest flow of fluid, multiple stages of the individual Electrostatic Fluid Accelerator are utilized with a collecting electrode between successive stages in order to preclude substantially all ions and other electrically charged particles from passing to the next stage, where they would tend to be repelled and thereby impair the movement of the fluid. Finally, constructing the exciting electrode in the form of a plate that extends downstream with respect to the desired direction of fluid flow also assures that more ions and, consequently, more fluid particles flow downstream.

Claims

1. An electrostatic fluid accelerating apparatus comprising an electrostatic fluid accelerator for moving a fluid, which electrostatic fluid accelerator comprises:

a multiplicity of closely spaced corona electrodes;

at least one exciting electrode located between said corona electrodes; and

at least one attracting electrode, a voltage difference between said corona electrode and said attracting electrode being maintained at a level between zero volts and a corona onset voltage level of said attracting electrode;

said attracting electrode being located, with respect to a desired fluid flow direction, wholly downstream from said corona electrodes,

wherein a voltage between said corona electrodes and said exciting electrode is controlled by a flexible top high-voltage power supply.

2. The electrostatic fluid accelerating apparatus as recited in claim 1, wherein:

a voltage between said corona electrodes and said at least one exciting electrode is maintained between a corona onset voltage and a breakdown voltage of said corona electrodes.

3. The electrostatic fluid accelerating apparatus as recited in claim 1, wherein:

said exciting electrode is a plate that extends downstream with respect to the desired direction of fluid flow.

4. The electrostatic fluid accelerating apparatus as recited in claim 1, further comprising:

one or more additional electrostatic fluid accelerators, each of said additional electrostatic fluid accelerators being located downstream, with respect to the desired direction of fluid flow, from a respective preceding electrostatic fluid accelerator; and

at least one collecting electrode located between at least one pair of said electrostatic fluid accelerators.

5. An electrostatic fluid accelerating apparatus comprising:

an electrostatic fluid accelerator for moving a fluid, which electrostatic fluid accelerator comprises;

a multiplicity of closely spaced corona electrodes;

at least one exciting electrode located between said corona electrodes; and

at least one attracting electrode, a voltage difference between said corona electrode and said attracting electrode being maintained at a level between zero volts and a corona onset voltage level of said attracting electrode;

said attracting electrode being located, with respect to a desired fluid flow direction, wholly downstream from said corona electrodes,

the electrostatic fluid accelerating apparatus further comprising;

one or more additional electrostatic fluid accelerators, each of said additional electrostatic fluid accelerators being located downstream, with respect to the desired direction of fluid flow, from a respective preceding electrostatic fluid accelerator; and

at least one collecting electrode located between at least one pair of said electrostatic fluid accelerators.

6. The electrostatic fluid accelerating apparatus as recited in claim 5,

wherein said exciting electrode is a plate that extends downstream with respect to the desired direction of fluid flow.

7. The electrostatic fluid accelerating apparatus as recited in claim 5,

wherein a voltage between said corona electrodes and said at least one exciting electrode is maintained between a corona onset voltage and a breakdown voltage of said corona electrodes.

8. The electrostatic fluid accelerating apparatus as recited in claim 7,

wherein a voltage between said corona electrodes and said exciting electrode is controlled by a flexible top high-voltage power supply.

9. An electrostatic fluid accelerating apparatus comprising an electrostatic fluid accelerator for moving a fluid, which electrostatic fluid accelerator comprises:

a multiplicity of closely spaced corona electrodes;

at least one exciting electrode located between said corona electrodes; and

at least one repelling electrode located, with respect to the desired fluid flow direction, wholly upstream from said corona electrodes,

wherein a voltage between said corona electrodes and said exciting electrode is controlled by a flexible top high voltage power supply.

10. The electrostatic fluid accelerating apparatus as recited in claim 9, wherein:

said exciting electrode is a plate or set of plates that extends downstream with respect to the desired direction of fluid flow.

11. The electrostatic fluid accelerating apparatus as recited in claim 9,

wherein a voltage between said corona electrodes and said at least one exciting electrode is maintained between a corona onset voltage and a breakdown voltage of said corona electrodes.

12. The electrostatic fluid accelerating apparatus as recited in claim 9, further comprising:

one or more additional electrostatic fluid accelerators, each of said additional electrostatic fluid accelerators being located downstream, with respect to the desired direction of fluid flow, from a respective preceding electrostatic fluid accelerator; and

at least one collecting electrode located between at least one pair of said electrostatic fluid accelerators.

13. An electrostatic fluid accelerating apparatus comprising:

an electrostatic fluid accelerator for moving a fluid, which electrostatic fluid accelerator comprises;

a multiplicity of closely spaced corona electrodes;

at least one exciting electrode located between said corona electrodes; and

at least one repelling electrode located, with respect to the desired fluid flow direction, wholly upstream from said corona electrodes,

the electrostatic fluid accelerating apparatus further comprising;

one or more additional electrostatic fluid accelerators, each of said additional electrostatic fluid accelerators being located downstream, with respect to the desired direction of fluid flow, from a respective preceding electrostatic fluid accelerator; and

at least one collecting electrode located between at least one pair of said electrostatic fluid accelerators.

14. The electrostatic fluid accelerating apparatus as recited in claim 13,

wherein said exciting electrode is a plate that extends downstream with respect to the desired direction of fluid flow.

15. The electrostatic fluid accelerating apparatus as recited in claim 13,

wherein a voltage between said corona electrodes and said at least one exciting electrode is maintained between a corona onset voltage and a breakdown voltage of said corona electrodes.

16. The electrostatic fluid accelerating apparatus as recited in claim 15,

wherein a voltage between said corona electrodes and said exciting electrode is controlled by a flexible top high-voltage power supply.

17. An electrostatic fluid accelerating apparatus comprising:

a first electrostatic fluid accelerator for moving a fluid comprising;

a multiplicity of closely spaced corona electrodes;

at least one exciting electrode asymmetrically located between said corona electrodes; and

at least one accelerating electrode;

a voltage difference between said corona electrodes and said at least one accelerating electrode being maintained at a level between zero volts and a corona onset voltage level of said accelerating electrode;

a voltage between said corona electrodes and said exciting electrodes being maintained between a corona onset voltage level and a breakdown voltage level of said corona electrodes;

one or more additional electrostatic fluid accelerators, each of said additional electrostatic fluid accelerators being located downstream, with respect to the desired direction of fluid flow, from a respective preceding electrostatic fluid accelerator; and

at least one collecting electrode located between at least one pair of said electrostatic fluid accelerators.