Abstract: A liquid filtering and purifying device and method for filtering and purifying used engine coolant in order to produce a concentrated portion for disposal and a purified portion intended to be reused has a plurality of filtering, separating and purifying devices, both mechanical and membranous. The purification device and method of this invention provide for multiple recirculation for removing and concentrating impurities and contaminants.
Type:
Grant
Filed:
May 14, 1990
Date of Patent:
August 18, 1992
Assignee:
JH Systems, Inc.
Inventors:
William M. Frederick, Jr., David Kennell, Robert Sancken