Patent ID: 6165048
Filing Date: 2000-12-26
Classification: B23Q,B24B

Abstract:
Apparatus comprising:a source of particulate containing fluid;a user of particulate containing fluid;a source of backflushing fluid;a drain for said fluids;a first filter;a second filter;valving means for respectively connecting in first and second modes:said source of particulate containing fluid through said first filter to said user of said particulate containing fluid and said source of backflushing fluid through said second filter to said drain for said fluids; andsaid source of particulate containing fluid through said second filter to said user of said particulate containing fluid and said source of backflushing fluid through said first filter to said drain for said fluids;said valving means includes precharging valving means for connecting said source of particulate containing fluid to said first filter during said second mode and said second filter during said first mode; anda control system for changing said valving means between said first and second modes.