Filter Cigarette Holder

Abstract

This invention relates to a filtering device for use with cigarettes and other smoking products. Embodiments of the invention include a cigarette holder equipped with pressure filtering. Embodiments may be smaller than about 20 mm, include a separate semi-closed collection chamber to prevent “backwash” of tar which would otherwise occur due to the filter's small size, require less material than current cigarette filters, enable more effective filtration, increase filter capacity for holding tar, and provide additional benefits resulting from the greater likelihood of use by smokers. Another embodiment would include the replacement of the plastic casing with paper, creating a filter made mostly of naturally biodegradable material.

1 - 22 . (canceled) 
     
     
         23 . A single-stage cigarette filter comprising a sleeve for receiving a cigarette, a filter, an at least one exit tube, an at least one affixing spike, and a collection chamber for receiving and storing intake gases and coalescing tar carried by inhaled gases, where the collection chamber is disposed posterior to the filter and is formed around the at least one exit tube. 
     
     
         24 . The filter of claim  1 , where the filter has a longitudinal length equal to or less than about 20 mm and a collection cone posterior to the filter disc and anterior to the collection chamber, for directing airflow. 
     
     
         25 . The filter of claim  1 , where the collection chamber is formed at least in part by tapered outer sides. 
     
     
         26 . The filter of claim  1 , further comprising an at least one affixing spike and a conical collection surface, and where the collection chamber is formed at least in part by tapered sides. 
     
     
         27 . The filter of claim  1 , further comprising an exit mouth hole of approximately 1.5 mm to 2.5 mm. 
     
     
         28 . The filter of claim  1 , where the filter disc is comprised of at least eight inner filter holes. 
     
     
         29 . The filter of claim  6 , where the inner surfaces of the filter holes are pitched 30 to 50 degrees. 
     
     
         30 . The filter of claim  6 , where the filter holes are pitched about 45 degrees. 
     
     
         31 . The filter of claim  1 , further comprising a tapered collection chamber having a length of about 3.8 mm to about 4.8 mm. 
     
     
         32 . The filter of claim  1 , where the filter disc has a depth of about 1 mm. 
     
     
         33 . The filter of claim  1 , further comprising a retaining o-ring. 
     
     
         34 . The filter of claim  1 , further comprising a retaining o-ring, and where the sleeve is comprised at least in part of paper. 
     
     
         35 . The filter of claim  1 , further comprising an internal ridge disposed in the collection chamber for disrupting an inhaled stream of gases and accompanying substances. 
     
     
         36 . The filter of claim  1 , further comprising a disruption ridge located in the collection chamber, and at least one exit hole. 
     
     
         37 . The filter of claim  1 , further comprising a filtering disc with a depth of about 1 mm and a width of about 7 mm. 
     
     
         38 . The filter of claim  1 , further comprising a spike having a length of about 6 mm to about 7.5 mm. 
     
     
         39 . The filter of claim  1 , further comprising a collection chamber having a length of about 4.5 to about 5.5 mm. 
     
     
         40 . The filter of claim  1 , where a ridge in the collection chamber encircles the exit hole, and further comprising a collection cone. 
     
     
         41 . The filter of claim  1 , further comprising a perimeter baffle circling the exit hole, a collection column, and an internal ridge for disrupting an inhaled stream of gases and accompanying substances. 
     
     
         42 . The filter of claim  1 , where a chamber wall anterior to the filter and conical collection surface contains crevices. 
     
     
         43 . The filter of claim  1 , further comprising an at least one affixing spike and an at least one barb on the affixing spike. 
     
     
         44 . The filter of claim  1 , where the barb is a 360-degree continuous spur for locking the cigarette into the filter.