| abstract |
In one embodiment of the present invention there is provided a filter having a first structural member (105) extending along and clockwise about an axis, a second structural member (110) extending along and counter clockwise about the axis and a material capture structure (115) extending between the first and the second structural members ( 105, 110) and across the axis. In yet another embodiment, there is provided a filter having a first spiral shaped support member (105) having an end; a second support member (110) positioned to cross the first spiral support member (105) and form a loop between the end and the place where the second support member (110) crosses the first spiral support member (105); and a material capture structure (115) extending across and secured to the loop. |