Patent ID: 8377295
Filing Date: 2013-02-19
Classification: B01D,F01M

Abstract:
1. A combination filter arrangement comprising: an external housing including: a hollow cylindrical filter element arranged within said housing filtering a first fluid medium; a central body arranged within hollow interior of said hollow cylindrical filter element, said central body produced from an elastomer; a cylindrical partition member arranged in said external housing and enclosing said filter element, said cylindrical partition spaced apart inwardly from said external housing defining a thermal compensation medium volume between said external housing and said cylindrical partition, said cylindrical partition including: wherein said first fluid medium includes a urea-water additive, said first fluid medium having a higher freezing point temperature than said thermal compensation medium; wherein at least a portion of said partition member is sufficiently elastic to permit freezing of said urea-water additive to be compensated without damaging said filter element or said filter arrangement; wherein said partition member is produced from an elastomer; wherein said thermal compensation medium flowing through said thermal compensation medium volume is operable to heat or thaw said first fluid medium and said cylindrical filter element.