Inventors:
Leland H. Lyon - Roanoke VA
Richard L. Eggeling - Roanoke VA
Assignee:
Ingersoll-Rand Company - Woodcliff Lake NJ
International Classification:
B01D 2911
Abstract:
A filter apparatus for a percussion device to be powered by fluid pressure, which when the apparatus is in an assembled position, comprises a filter recess formed within a housing encasing the percussion device. An assembly fastener is disposed within the recess. A first filter is disposed about the assembly fastener. A filter support is disposed about the first filter. A second filter is mounted around the filter support. Both the first and the second filter have a filtering gauge size, and the filtering gauge of the first filter exceeds the filtering gauge of the second filter.