Image Number 4 for United States Patent #5899224.
Flow controls that can be inserted in a liquid-supply line or in the accommodating bore of a plumbing fitting. The controls have an essentially cup-shaped mount with perforations through its bottom and a disk of resilient material fits into the perforations. At least the edge of the side of the disk facing the bottom of the cup has a conical bevel of 1.degree. to 5.degree. to the midplane of the disk and narrow ribs and/or sector-shaped webs that extend out essential radially at a prescribed angle around a prescribed circumferential angle.