Self-cleaning intake filter

An intake filter including a cylindrical screen assembly, a core assembly and a drive unit;

• where the drive unit is attached to the intake filter and configured to rotate the screen assembly about a longitudinal axis of said screen assembly, wherein the core assembly is configured to be attached to an intake, such that the drive unit lies entirely outside a volume of the screen assembly and a portion of the core assembly lies within the volume of the screen assembly;
• wherein, the intake filter comprises a removable non-rotating end seal releasably attached to one terminal end of the intake filter, a first end, and a screen stop located adjacent an opposite terminal end of the intake filter, a second end, between which the screen assembly lies;
• such that the core assembly comprises a core tube that is a tube that lies inside the filter assembly when the filter assembly lies between the end seal and the screen stop, such that the core tube comprises a first core section that is co-terminous with the first end, a second core section that is co-terminous with the second end and a central core section that lies between, and is co-terminous with, the first and second core sections;
• and
• wherein the central core section comprises a plurality of core inlets that are apertures through the wall of the central core section that extend around the circumference and length of said central core section;
• and
• the cross-sectional area of core inlets decreases along the length of central core section towards the screen stop.