Disc-type filter

A filter for use in the filtration of fluids, comprising:

• a filter housing, said housing having first and second flow ports;
• a plurality of stacked substantially parallel filter plates positioned within said housing in the path of fluid flow between said first and second ports, said plates being spaced apart to provide fluid communicating passages therebetween for filtration, and said plates being moveable to increase said spacing for cleaning of said passages;
• control means for selectively holding said plates in said spaced apart arrangement for filtration, and moving said plates apart for cleaning;
• and
• a plurality of retainers interconnecting said plates for providing a predetermined and limited spacing between each adjacent pair of plates in the stack when said plates are moved apart for cleaning.

A filter for use in the filtration of fluids, comprising:

• a filter housing, said housing having first and second flow ports;
• a plurality of stacked annular filter plates in substantial axial alignment with one another positioned within said housing in the path of fluid flow between said first and second ports, said plates being spaced apart to provide fluid communicating passages therebetween for filtration, being axially moveable to increase said spacing for cleaning of said passages, and each having a substantially uniform central opening, said openings being in fluid communication with one another and communicating with said first port;
• control means for selectively holding said plates in said spaced apart arrangement for filtration, and axially moving said plates apart for cleaning;
• and
• a plurality of retainers interconnecting said plates, said retainers being positioned intermediate of said central openings and the periphery of said plates for providing a predetermined and uniform spacing between adjacent plates when moved apart for cleaning.