US2012192534A1PendingUtilityA1

Multi-stage hood filter system

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Individually held — no corporate assignee on recordPriority: Jan 31, 2011Filed: Jan 31, 2012Published: Aug 2, 2012
Est. expiryJan 31, 2031(~4.5 yrs left)· nominal 20-yr term from priority
Inventors:Jeffrey S. Lambertson
B01D 46/52B01D 2279/35B01D 2267/60F24C 15/2035B01D 46/0006B01D 50/20B01D 46/62
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PatentIndex Score
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References
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Claims

Abstract

A filtration system for a ventilation hood includes a first filter configured to be mounted within the ventilation hood. The first filter includes an air inlet, and air outlet, and a grease outlet. The filtration system also includes at least one second filter, attached to the first filter, and operatively located downstream of the first filter.

Claims

exact text as granted — not AI-modified
1 . A filtration system for a ventilation hood, comprising:
 a cartridge filter configured to be mounted within the ventilation hood, comprising an air inlet, an air outlet, and a grease outlet, the cartridge filter being configured to drain grease through the grease outlet and out of the ventilation hood; and   an additional filter configured to be mounted within the ventilation hood, operatively disposed downstream of the cartridge filter.   
     
     
         2 . The filtration system of  claim 1 , wherein the cartridge filter is effective as a fire barrier. 
     
     
         3 . The filtration system of  claim 1 , wherein the additional filter comprises a member selected from the group consisting of a woven metal, a corrugated metal, and a fiber. 
     
     
         4 . The filtration system of  claim 1 , wherein the additional filter comprises a fiber, the system further comprising a perforated sheet configured to be mounted within the ventilation hood at a location downstream of the additional filter. 
     
     
         5 . The filtration system of  claim 4 , further comprising a filter housing, configured to removably receive the filters, and comprising the perforated sheet. 
     
     
         6 . The filtration system of  claim 1 , further comprising a third filter configured to be mounted within the ventilation hood, at a location downstream of the additional filter. 
     
     
         7 . The filtration system of  claim 1 , wherein the filters are configured to be attached to one another. 
     
     
         8 . A filtration system for a ventilation hood, comprising:
 a housing configured to be mounted within the ventilation hood,   a cartridge filter configured to be mounted within the housing, comprising an air inlet, an air outlet, and a grease outlet, the cartridge filter being configured to drain grease through the grease outlet and out of the ventilation hood; and   an additional filter configured to be mounted within the housing at a location downstream of the cartridge filter.   
     
     
         9 . A ventilation hood, comprising:
 a cartridge filter mounted within the ventilation hood, comprising an air inlet, an air outlet, and a grease outlet, the cartridge filter being configured to drain grease through the grease outlet and out of the ventilation hood; and   an additional filter mounted within the ventilation hood at a location downstream of the cartridge filter.   
     
     
         10 . A filtration system for a ventilation hood, comprising:
 a first filter configured to be mounted within the ventilation hood, wherein the first filter is effective at filtering particles of a first particle size and less effective at filtering particles of a second particle size; and   a second filter configured to be mounted within the ventilation hood, operatively disposed downstream of the first filter, wherein the second filter is effective at filtering particles of the second particle size;   wherein at least one of the filters is effective as a fire barrier.   
     
     
         11 . The filtration system of  claim 10 , wherein the first filter is effective at filtering large particles, and is effective as a fire barrier, and wherein the second filter is effective at filtering relatively smaller particles. 
     
     
         12 . The filtration system of  claim 11 , wherein the first filter is effective at filtering particles of approximately 5 μm and larger, and less effective at filtering particles smaller than approximately 5 μm. 
     
     
         13 . The filtration system of  claim 11 , wherein the second filter is not effective as a fire barrier. 
     
     
         14 . The filtration system of  claim 10 , wherein the first filter comprises a cartridge filter. 
     
     
         15 . The filtration system of  claim 10 , wherein the second filter comprises a member selected from the group consisting of a woven metal, a corrugated metal, and a fiber. 
     
     
         16 . The filtration system of  claim 10 , wherein the second filter comprises a fiber, the system further comprising a perforated sheet configured to be mounted within the ventilation hood at a location downstream of the second filter. 
     
     
         17 . The filtration system of  claim 16 , further comprising a filter housing, configured to removably receive the first and second filters, and comprising the perforated sheet. 
     
     
         18 . The filtration system of  claim 10 , further comprising a third filter configured to be mounted within the ventilation hood, at a location downstream of the second filter. 
     
     
         19 . A filtration system for a ventilation hood, comprising:
 a first filter configured to be mounted within the ventilation hood, comprising an air inlet, an air outlet, and a grease outlet, the first filter being configured to drain grease through the grease outlet and out of the ventilation hood; and   a second filter configured to be mounted within the ventilation hood, operatively disposed downstream of the first filter.   
     
     
         20 . The filtration system of  claim 19 , wherein the first filter is effective as a fire barrier. 
     
     
         21 . The filtration system of  claim 19 , wherein the first filter comprises a cartridge filter. 
     
     
         22 . The filtration system of  claim 19 , wherein the first filter comprises a baffle filter.

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