Patent ID: 9539527
Date: 2017-01-10
CPC Classifications: B01D

Claim:
1. A filter for filtration of media, the filter comprising a pleated, cylindrical filter element ( 2 ), which is located between a perforated, cylindrical backflow preventer ( 3 ) with an inner surface having a radius ( 9 ) and a perforated, cylindrical core ( 4 ) with an outer surface having a radius ( 10 ), the filter element ( 2 ) being arranged in pleated folds ( 5 , 7 ) including a plurality of first folds ( 5 ) having a first fold height ( 6 ) which is greater than a difference between the radius ( 9 ) of the backflow preventer ( 3 ) and the radius ( 10 ) of the core ( 4 ), each of the first folds ( 5 ) being inclined in relation to a radial line ( 12 ) by an angle of inclination ( 13 ) and being directed away from the outer surface ( 11 ) of the core ( 4 ), and a plurality of second folds ( 7 ) being provided and having at least one second fold height ( 8 ) shorter than the first fold height ( 6 ), and the second folds ( 7 ) being arranged radially adjacent to the backflow preventer ( 3 ) and alternatingly adjacent to the first folds ( 5 ), the second folds (