Patent ID: 9427683
Filing Date: 2016-08-30
CPC Classification: B01D,B67D

Claim Text:
1. A filter device for a pump unit, comprising: a cylindrical body comprising a bottom and a wall coupled with the bottom, the wall circumscribing a center axis to form a filter chamber having an inner volume having a filter removably and replaceably disposed therein, the wall having a first aperture and having a second aperture allowing ingress and egress into the filter chamber from outside of the wall; a first tubular structure disposed on the wall and aligned with the second aperture, the first tubular structure having a first bore that extends from a first end of the first tubular structure that secures to the wall to a second end of the tubular structure that secures the cylindrical body on a suction side of the pump unit; and an inspection element disposed in position to seal the first aperture, the inspection element comprising an optical element that forms a line of sight to the inner volume through the first aperture; wherein when the filter is not disposed in inner volume, the line of sight extends to the first tubular structure through the second aperture; and wherein when the filter is disposed in the inner volume, the line of sight does not extend to the first tubular structure through the second aperture due to presence of the filter.