Fluid filter cartridge and method of its construction.

摘要

An insert (10) for placement between concentric cylindrical filter elements (22, 24) comprises in a one-piece construction a tubular cylindrical body (34) and pairs of parallel slits in the body each forming therebetween a strip (36) of material connected to the remainder of the body at the ends of the strip. The strips are bowed inwardly away from the remainder of the body between their ends to form protrusions extending transversely from the remainder of the body.