Patent ID: 6132483
Filing Date: 2000-10-17
Classification: B01D

Abstract:
An interchangeable insert filter for use within hardware apparatus of a railway air brake system on a railway car, and insertable within an airway port of such hardware apparatus through which air brake air must pass, said insert filter comprising;a) a ring member defining an opening;b) a plurality of spaced support ribs extending from a first side of said ring member and intersecting at a location spaced from said first side of said ring member to defining a volume adjacent to said opening;c) said support ribs in combination supporting an air filtering screen mesh adjacent to said opening, further defining said volume adjacent to said opening;d) each of said support ribs having a primary interface rib surface adjacent to an outer edge surface of said ring member to frictionally engage cylindrical inner surfaces of a first airway port of such hardware apparatus; ande) each of said support ribs also having a secondary interface rib surface adjacent to said primary interface rib surface to frictionally engage cylindrical inner surfaces of a second airway port of such hardware apparatus, whereby such second airway port is smaller than such first airway port.