John Douglas Autry

20160030869, Feb 4, 2016

Jul 31, 2015

14/815580

- Ludwigsburg, DE
John Autry - Fayetteville NC, US
Gregg Updike - Galesburg MI, US

B01D 46/00
B01D 39/16
B01D 46/52

A filter element has a filter media hollow body with a hollow interior circumferentially enclosing an outflow passage. A second filter as a bypass filter element is arranged at or integrated into the end cap the filter element. The bypass filter element is configured as an ambient airflow restriction device providing a significantly higher pressure drop relative to the in the filter media of the filter element, the significantly higher pressure drop is operable to limit or prevent airflow through the auxiliary inflow path. When the primary inflow path is obstructed, the ambient airflow restriction device operates to provide auxiliary airflow into the outflow passage, bypassing filtering of the filter media hollow body of the filter element.