Claims
- 1. An airflow apparatus comprising:
- a) an elongated tube having an axis, an axial length, a proximal end, a distal end, and a peripheral permeable wall around said axis, said wall having a surface area;
- b) said tube disposed in an air environment;
- c) said wall having a plurality of openings distributed along said axial length to allow said air to pass through said wall, said openings being arranged in size and quantity along said axial length to provide a progressively increasing wall air flow-through area per unit surface area of said wall along said axial length;
- d) said wall air flow-through area per unit surface area of said wall being at a minimum value proximate said proximal end and at a maximum value proximate said distal end;
- e) a fan connected to said tube by means of a duct, forcing said air to flow through said tube, said air flowing through said proximal end of said tube and at least a first portion of said air flowing through said wall of said tube;
- f) means for terminating said tube at said distal end, said terminating means defining a second portion of said air which flows through said distal end, said second portion of said air having a minimum magnitude of zero;
- g) said terminating means, said openings and said fan cooperating to define an airflow-rate through any portion of said wall along said axial length of said tube.
- 2. The apparatus of claim 1, wherein said fan causes said first portion of said air to flow through said proximal end and subsequently through said wall of said tube.
- 3. The apparatus of claim 1, wherein said fan causes said first portion of said air to flow through said wall and subsequently through said proximal end of said tube.
- 4. The apparatus of claim 1, wherein said terminating means is an air permeable cap.
- 5. The apparatus of claim 1, wherein said terminating means is an air impermeable cap.
- 6. The apparatus of claim 1, wherein said wall is formed from a woven material, said woven material being woven more tightly at said proximal end than at said distal end.
- 7. The apparatus of claim 1, wherein said flow-through area comprises a specific quantity of said openings increasing in size along said axial length.
- 8. The apparatus of claim 1, wherein said flow-through area comprises said openings being of uniform size, increasing in quantity along said axial length.
- 9. The apparatus of claim 1, wherein said airflow-rate through said wall is substantially equal at all portions of said wall.
Parent Case Info
This is a continuation-in-part of U.S. patent application Ser. No. 08/528,720 filed, Sep. 15, 1995 by applicant, now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (1)
Number |
Date |
Country |
293275 |
Aug 1916 |
DEX |
Non-Patent Literature Citations (1)
Entry |
Ephraim M. Sparrow et al., "Enhanced Applications of Attic-Collected Solar Energy", Solar 95 Conference Proceedings, American Solar Energy Society, Boulder, Colorado, Jul. 15, 1995, pp. 1-18. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
528720 |
Sep 1995 |
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