Abstract: A pump for pumping fluids in a filtration system is disclosed. The pump has a thrust balancing means to reduce axial loads on motor bearings of the pump during operation of the pump. A drive system of the pump includes an elongate flexible shaft interconnecting a drive shaft and an impeller shaft. The elongate flexible shaft bends and twists to accommodate misalignment during assembly of the drive system. A seal assembly is provided for sealing about a drive shaft. The seal assembly is evacuated to prevent pumped fluid from contaminating fluids in the motor. A concentric coupling and method for making the same are taught which include a cylindrical block which is concentrically bored and cut into an annular L-shaped segment having an L-shaped notch and a semi-cylindrical mating segment which is received into the notch. The coupling concentrically joins a pair of shafts together.

Abstract: Filter apparatus for filtering contaminants from a fluid, such as machine tool coolant, are disclosed. One filter apparatus includes a filter drum unit having a generally cylindrical open perforated support sheet with a cylindrical screen element mounted thereabout. Circumference varying mechanisms, such as turnbuckles, are connected relative to the support plate to vary the circumference of the support plate and the tautness of the screen element. A disc filter assembly having a mandrel and fluidly attached annular disc filter elements is also described. Each annular disc filter element has an inner structure with concentric ribs forming concentric grooves therebetween which are connected to radially extending grooves. A screen element is supported by the ribs so that the microscreen will not tear while allowing filtering of fluid into the grooves which are in fluid communication with the mandrel.

Abstract: A concentric coupling and method for making the same are taught which include a cylindrical block which is concentrically bored and cut into an annular L-shaped segment having an L-shaped notch and a semi-cylindrical mating segment which is received into the notch. The coupling concentrically joins a pair of shafts together.

Abstract: Filter apparatus for filtering contaminants from a fluid, such as machine tool coolant, are disclosed. One filter apparatus includes a filter drum unit having a generally cylindrical open perforated support sheet with a cylindrical screen element mounted thereabout. Circumference varying mechanisms, such as turnbuckles, are connected relative to the support plate to vary the circumference of the support plate and the tautness of the screen element. A disc filter assembly having a mandrel and fluidly attached annular disc filter elements is also described. Each annular disc filter element has an inner structure with concentric ribs forming concentric grooves therebetween which are connected to radially extending grooves. A screen element is supported by the ribs so that the microscreen will not tear while allowing filtering of fluid into the grooves which are in fluid communication with the mandrel.

Abstract: A pump for pumping fluids in a filtration system is disclosed. The pump has a thrust balancing means to reduce axial loads on motor bearings of the pump during operation of the pump. A drive system of the pump includes an elongate flexible shaft interconnecting a drive shaft and an impeller shaft. The elongate flexible shaft bends and twists to accommodate misalignment during assembly of the drive system. A seal assembly is provided for sealing about a drive shaft. The seal assembly is evacuated to prevent pumped fluid from contaminating fluids in the motor. A concentric coupling and method for making the same are taught which include a cylindrical block which is concentrically bored and cut into an annular L-shaped segment having an L-shaped notch and a semi-cylindrical mating segment which is received into the notch. The coupling concentrically joins a pair of shafts together.

Abstract: The disclosure concerns a smooth continuous steel trough, free of longitudinal weld joints except for a flanged frame attached to its open top for supporting a cover grating. The apparatus for performing these steps comprises a conveyor table for moving and clamping a parallel edged sheet of steel while it is cut, such as by a torch, to predetermined length sides, and angled ends corresponding to the flow pitch for the resulting trough. The resulting isosceles trapezoidal section is then conveyed and aligned under an oscillatable convex mandrel or roller having a longitudinal clamping rib axially along its periphery for clamping the trapezoidal sheet near its center at the bottom of what is to be one of the equal side walls of the resulting trough. The conveyor and/or support for the sheet at the mandrel is vertically adjustable to compensate for different size mandrels and thicknesses of the sheets.

Abstract: The disclosure concerns a smooth continuous steel trough, free of longitudinal weld joints except for a flanged frame attached to its open top for supporting a cover grating. This trough is, for example, of the type embedded in the floor of a factory for the gravity and/or jet flow of contaminated coolants from machining operations.