Patent ID: 6210565
Filing Date: 2001-04-03
Classification: B01D,G01F

Abstract:
An apparatus for measuring a fluid flowrate through a fluid circuit with a filter head, said apparatus comprising:(a) a housing comprising an internal surface defining an interior volume;(b) a coupling for connecting said housing to the filter head, and comprising an inlet for communicating a fluid inflow from a fluid circuit to said interior volume, and an outlet for communicating a fluid discharge from said interior volume to the fluid circuit;(c) a flow indicator movable within said housing in response to a fluid flowrate through the fluid circuit; and(d) a discharge tube having a first end connected to said outlet, a body having a length extending through at least a portion of said housing, an outer surface, an inner fluid passage extending through at least a portion of said tube and communicating with said outlet, and at least one opening through said body allowing fluid communication between said interior volume of said housing and said fluid passage;wherein said at least one opening comprises a slot extending along the length of said body, and wherein said flow indicator comprises a generally annular piston having an outer edge movable along said internal surface of said housing, and an inner edge movable along said outer surface of said tube.