Patent ID: 6010625
Filing Date: 2000-01-04
Classification: B01D,B29C

Abstract:
A filter changer for a fluid, comprisinga pair of members having opposed, generally conforming surfaces,gap forming means adapted to connect said members rigidly to form a predetermined adjustable space between said surfaces, said members respectively forming upstream and downstream passages extending transversely of said surfaces and a filter aperture communicating between said passages, said members respectively having spaced parallel slide surfaces defining a filter channel extending transversely of said passages through the filter aperture to the exterior of said members,a filter carrier assembly having spaced parallel surfaces slidable between said slide surfaces, at least two spaced filter openings and filters in said openings each having an area for exposure to the upstream passage when aligned with said aperture,means adapted to displace the filter carrier assembly by intermittent transition displacements to align said filters with the filter aperture successively, the duration of each displacement being substantially less than that between displacements, anda ring shaped seal in the filter aperture adapted for sealingly connecting between said area of a filter aligned therewith and said upstream passage, said gap forming means being adjusted to cause the space between said slide surfaces to exceed the space between said surfaces of the filter carrier assembly, thereby producing an adjustable leakage gap for fluid effective during said transition displacements.