Outside telecommunications equipment enclosure having hydrophobic vent

• US 5,886,296 A
• Filed: 09/22/1997
• Issued: 03/23/1999
• Est. Priority Date: 06/07/1995
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Network Communications Incorporated (Fujitsu Limited)
• Inventors: Hendrix, Walter Mark, DeFrancesco, Marc, Ghorbani, Ali
• Primary Examiner(s): Dougherty, Thomas M.
• Assistant Examiner(s): Waks, Joseph
• Application Number:
  US08/934,813
• Time in Patent Office: 547 Days
• Field of Search: 174/50, 174/38, 174/37, 95/900, 55/528, 96/13, 96/14
• US Class Current: 174/50
• CPC Class Codes: H05K 7/20181 Filters; Louvers

Abstract

An outside plant equipment enclosure for housing telecommunications equipment, which normally operates when the equipment enclosure is closed, is provided. The enclosure includes an internal compartment for storing telecommunications equipment, at least one opening in the internal compartment and a hydrophobic material. The at least one opening defines substantially the entire area of the internal compartment which is open to an outer atmosphere when the telecommunications equipment is normally operating. The hydrophobic material entirely covers every opening of the at least one opening.

Claims

1. An outside plant equipment enclosure for housing telecommunications equipment, comprising:

a cabinet wall defining an internal compartment for housing telecommunications equipment which normally operates when the equipment enclosure is closed and sealed;

at least one pair of openings in the internal compartment, the at least one pair of openings including inlet and outlet openings and defining substantially an entire area of the internal compartment which is open to an outer atmosphere when the telecommunications equipment is normally operating;

a hydrophobic material entirely covering the at least one pair of openings;

an inlet fan attached to the cabinet wall at the inlet opening to force air through the hydrophobic material and into the internal compartment, the hydrophobic material being positioned between the inlet opening and the inlet fan; and

an outlet fan attached to the cabinet wall at the outlet opening to force air through the hydrophobic material and out of the internal compartment, the hydrophobic material being positioned between the outlet opening and the outlet fan.

2. An outside plant equipment enclosure according to claim 1, wherein the hydrophobic material has openings which are between 3 and 25 microns wide.

3. An outside plant equipment enclosure according to claim 1, wherein the hydrophobic material has openings which are between 10 and 25 microns wide.

4. An outside plant equipment enclosure according to claim 1, wherein the hydrophobic material has openings which are between 3 and 10 microns wide.

5. An outside plant equipment enclosure according to claim 1, wherein the hydrophobic material has openings which are between 15 and 25 microns wide.

6. An outside plant equipment enclosure according to claim 1, wherein the hydrophobic material is an expanded polytetrafluoroethylene.

7. An outside plant equipment enclosure according to claim 1, wherein there are a plurality of air inlet openings and one or more air outlet openings, the number of the air inlet openings being greater than the number of the air outlet openings.

8. An outside plant equipment enclosure according to claim 1, further comprising a backup battery located within the internal compartment.

9. An outside plant equipment enclosure according to claim 1, wherein each of said at least one pair of openings includes a plurality of holes formed through the cabinet wall, the hydrophobic material being provided in pieces respectively covering the holes in the cabinet wall.

10. An outside plant equipment enclosure according to claim 9, wherein each of said pieces of said hydrophobic material is surrounded by an adhesive, the adhesive being adhered to the cabinet wall.

11. An outside plant equipment enclosure according to claim 1, further comprising wire mesh screens respectively provided adjacent to the at least one pair of openings, exterior to the internal compartment, and on an opposite side of the cabinet wall from the hydrophobic material and the inlet and outlet fans.

12. An outside plant equipment enclosure according to claim 1, further comprising support plates respectively provided between the hydrophobic material and the inlet and outlet fans.

13. An outside plant equipment enclosure according to claim 1, wherein the inlet openings are provided toward a bottom of the cabinet and the outlet openings are provided toward a top of the internal compartment.

14. An outside equipment enclosure according to claim 1, wherein there are at least two pairs of inlet and outlet openings respectively provided on opposing sides of the internal compartment.