Abstract: This invention relates to apparatus for periodically automatically purging the contaminants from a filter unit of a compressed air system to reactivate the filtering medium in the filter unit during the time that an air compressor for supplying air under pressure to the system is operating unloaded or is stopped.
Type:
Grant
Filed:
September 17, 1973
Date of Patent:
February 10, 1976
Assignee:
Westinghouse Air Brake Company
Inventors:
William J. Hewitt, Frank W. Shirey, Mortimer D. Wilson