US2006199507A1PendingUtilityA1

Filter

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Assignee: DU PLESSIS URBAINPriority: Dec 24, 2002Filed: Dec 24, 2003Published: Sep 7, 2006
Est. expiryDec 24, 2022(expired)· nominal 20-yr term from priority
Inventors:Urbain Du Plessis
B01D 2253/102B01D 2253/106F21S 45/33B01D 46/62B01D 46/0036B01D 2259/4148B01D 46/30B01D 53/0407B01D 53/261B01D 2279/45
21
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Claims

Abstract

Electrical equipment comprising a sealed chamber in which an electrical appliance is housed, and a multi-stage breather filter attached to the sealed chamber whereby in use heat generated by the electrical appliance causes air flow through the filter and also dries moisture collected by the filter.

Claims

exact text as granted — not AI-modified
1 . Electrical equipment comprising a sealed chamber in which an electrical appliance is housed, and a multi-stage breather filter attached to the sealed chamber whereby in use heat generated by the electrical appliance causes air flow through the filter and also dries moisture collected by the filter.  
   
   
       2 . The electrical equipment according to  claim 1  wherein the multi-stage filter comprises a filter housing defining an airflow passageway, the passageway including successive filter stages defined by 
 a) a porous membrane    b) activated carbon, and    c) silica gel.    
   
   
       3 . The electrical equipment according to  claim 2  wherein the passageway defines an air inlet at one end and an outlet at the other, the outlet being coupled to the electrical equipment.  
   
   
       4 . The electrical equipment according to  claim 1  wherein the electrical appliance is a light element.  
   
   
       5 . The electrical equipment according to  claim 2  wherein the porous membrane is fabricated from PTFE.  
   
   
       6 . The electrical equipment according to  claim 5  wherein the porous membrane is positioned adjacent the air inlet with the silica gel being positioned adjacent the outlet of the filter.  
   
   
       7 . The electrical equipment according to  claim 2  wherein the electrical appliance is a light element.  
   
   
       8 . The electrical equipment according to  claim 3  wherein the electrical appliance is a light element.  
   
   
       9 . The electrical equipment according to  claim 3  wherein the porous membrane is fabricated from PTFE.  
   
   
       10 . The electrical equipment according to  claim 4  wherein the porous membrane is fabricated from PTFE.

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