Patent ID: 6063269
Filing Date: 2000-05-16
Classification: B01D

Abstract:
A hydraulic system having an apparatus for filtering fluid therein, the hydraulic system comprising:a reservoir;first and second fluid carrying conduit connected to the reservoir;a venturi having an inlet connected to the first fluid carrying conduit of the hydraulic system for receiving a flow of the fluid therefrom, an outlet, and a continuous sidewall extending between the inlet and outlet forming a passage for the flow of the fluid through the venturi, the passage having a restricted portion located intermediate the inlet and the outlet, and the sidewall having an orifice therein communicating with the passage in the vicinity of the restricted portion thereof;a filter having an inlet, an outlet, and a passage for the flow of the fluid extending therebetween containing a filtration medium, the inlet of the filter being connected in communication with the outlet of the venturi for receiving the flow of the fluid therefrom, and the outlet of the filter being connected to the reservoir through a return conduit for passage of the flow of the fluid thereto; anda diverter conduit having a first end connected to the orifice in the sidewall of the venturi in communication with the restricted portion therein and a second end connected to the second fluid carrying conduit of the hydraulic system, the diverter conduit containing a restricted orifice therein, wherein the flow of the fluid through the restricted orifice portion of the passage of the venturi will generate a reduced pressure condition in the orifice in the sidewall of the venturi and in the diverter conduit operable to divert at least some of the fluid in the second fluid carrying conduit into the diverter conduit so as to pass therethrough and through the restricted orifice thereof into the passage of the venturi so as to flow through the filter and return to the hydraulic system, the restricted orifice operating to meter the flow of the fluid through the diverter conduit.