The United States of America as represented by the Secretary of the Navy
인용정보
피인용 횟수 :
7인용 특허 :
13
초록▼
An apparatus for collecting particles or vapor from air or surfaces comprising: a housing comprising an inlet open to the air to be sampled and an outlet; and a fan having one or more open areas within the housing capable of being driven at a speed effective to cause collection on the surface of the
An apparatus for collecting particles or vapor from air or surfaces comprising: a housing comprising an inlet open to the air to be sampled and an outlet; and a fan having one or more open areas within the housing capable of being driven at a speed effective to cause collection on the surface of the fan of particles or vapor in the air. A method of collecting a particulate sample from air comprising the step of driving a fan having one or more open areas within a housing comprising an inlet open to the air to be sampled and an outlet, at a speed effective to cause collection on the surface of the fan of particles in the air.
대표청구항▼
We claim: 1. An apparatus for collecting particles from air comprising: a housing comprising an inlet open to the air to be sampled and an outlet; a fan within the housing capable of being driven at a speed effective to cause collection on the surfaces of the fan of a portion of the particles in th
We claim: 1. An apparatus for collecting particles from air comprising: a housing comprising an inlet open to the air to be sampled and an outlet; a fan within the housing capable of being driven at a speed effective to cause collection on the surfaces of the fan of a portion of the particles in the air having a diameter of about 50 μm or less; wherein the fan comprises a hub and a plurality of axial fan blades connected to the hub at an end of each axial fan blade; and a packed sorbent bed between the inlet and the fan or between the fan and the outlet. 2. The apparatus of claim 1, wherein the fan is capable of being driven at a rotational speed of at least about 20,000 RPM. 3. The apparatus of claim 1, wherein the airflow rate is at least about 50 L/min. 4. The apparatus of claim 1, wherein the housing and fan together have a mass of no more than about 200 g. 5. The apparatus of claim 1, wherein the apparatus collects at least about 60% of the particles in the air having a diameter of about 50 μm or less that enter the inlet. 6. The apparatus of claim 1, wherein the apparatus collects particles by means of electrostatic attraction. 7. The apparatus of claim 1, wherein the particles are further collected on the inside surface of the housing. 8. The apparatus of claim 1, wherein the apparatus comprises more than one fan. 9. The apparatus of claim 1, further comprising vibrating means; wherein the vibrating means can be placed in contact with an object to loosen particles from the object and into the air. 10. The apparatus of claim 1, further comprising air collection means connected to the inlet. 11. The apparatus of claim 1, wherein the particles comprise a biological material. 12. The apparatus of claim 11, wherein a surface of the fan comprises a material that supports the life of the biological material. 13. The apparatus of claim 11, wherein a surface of the fan comprises a material that avoids denaturing of the biological material upon impact with the fan. 14. The apparatus of claim 1, wherein the particles comprise one or more materials selected from the group consisting of an explosive, a chemical warfare agent impregnated support, and a narcotic. 15. The apparatus of claim 1, further comprising means for vaporizing the collected particles as the particles are collected. 16. The apparatus of claim 15, wherein the vaporizing means vaporize materials impregnated into the particles. 17. The apparatus of claim 1, further comprising a vapor collector between the fan and the outlet. 18. The apparatus of claim 17, wherein the vapor collector has a plurality of zones that collect a plurality of different vapors. 19. The apparatus of claim 1, further comprising means for maintaining a constant flow rate of air through the apparatus. 20. A sensor comprising the apparatus of claim 1. 21. A method of collecting a particulate sample From air comprising the step of driving a fan within a housing comprising an inlet open to the air to be sampled and an outlet, at a speed effective to cause collection on the surfaces of the fan of particles in the air having a diameter of about 50 μm or less; wherein the fan comprises a hub and a plurality of axial fan blades connected to the hub at an end of each axial fan blade; and wherein the particles are collected in a packed sorbent bed. 22. The method of claim 21, wherein the fan is driven at a rotational speed of at least about 20,000 RPM. 23. The method of claim 21, wherein the method collects at least about 60% of the particles in the air having a diameter of about 50 μm or less that enter the inlet. 24. The method of claim 21, wherein the method collects particles by means of electrostatic attraction. 25. The method of claim 21, wherein the particles are collected on the inside surface of the housing. 26. The method of claim 21, further comprising the step of removing the particles from the fan. 27. The method of claim 26, wherein the removing step comprises rinsing the fan with a liquid that removes the particles. 28. The method of claim 26, further comprising the step of analyzing the removed particles. 29. The method of claim 21, further comprising the step of vaporizing the collected particles. 30. The method of claim 21, further comprising the step of vibrating an object to loosen particles from the object and into the air. 31. The method of claim 21, wherein the particles comprise one or more materials selected from the group consisting of a biological material, an explosive, a chemical warfare agent, and a narcotic. 32. The method of claim 21, further comprising the step of collecting vapor from the air that enters the inlet in a vapor collector. 33. The method of claim 21, further comprising the step of collecting particles having a diameter of about 50 μm or more in a filter. 34. The method of claim 21, wherein the flow of air through the fan is maintained at a constant flow rate. 35. The apparatus of claim 1, wherein the fan further comprises an annular ring connected to the axial fan blades. 36. The method of claim 21, wherein the fan further comprises an annular ring connected to the axial fan blades.
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