FILTER APPARATUS FOR MACHINE TOOL COULANT

摘要

Filter apparatus for filtering contaminants from a fluid, such as machine tool coolant, are disclosed. One filter apparatus includes a filter drum unit (160) having a generally cylindrical open perforated support plate (170) with a cylindrical screen element (172) mounted thereabout. Circumference varying mechanisms, such as turnbuckles (174), are connected relative to the support plate (170) to vary the circumference of the support plate (170) and the tautness of the screen element (172). A disc filter assembly (24') having a mandrel (100) and fluidly attached annular disc filter elements (88') is also described. Each annular disc filter element (260) has an inner structure (252) with concentric ribs (274) forming concentric grooves (270) therebetween which are connected to radially extending grooves (282). Each disc filter element (300) has a rectangular inner structure (302) which is pleated or folded in an accordion-like fashion.