US 4,282,094 AGranted

Filtering apparatus

AssigneeCharles F. Betz

InventorEdson Mitchell

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Abstract

An oil filtering and purifying apparatus comprising a closed pressure tank with fluid inlet and outlet openings and a plurality of vertically stacked filter units removably arranged within the tank; the filter units have central hubs with vertical flow passages; the flow passages of adjacent hubs communicate with each other and with the outlet opening; each unit includes a lower horizontal plate carried by its hub, a felting screen supported in spaced relationship above the plate and cooperating therewith to define a fluid conducting chamber below the screen and about the hub; and fluid ports in the hub communicating with the flow passage therein and with the chamber related thereto; the apparatus next includes a deposit of particulate filtering material atop the felting screen of each unit; a section line from said inlet opening to a supply of oil to be filtered; and a motor driven fluid pump with its inlet communicating with said outlet opening and its outlet communicating with an oil delivery line.

Claims10

Dependent claims

An oil filtering and purifying apparatus comprising a receptacle open to atmosphere, a supply of oil ladened with particulate and gaseous impurities in the receptacle, a vessel opened to atmosphere to receive oil worked upon, a closed pressure tank with an inlet opening and an outlet opening;

a fluid conductor communicating with and between the inlet opening and the supply of oil;
a motor driven pump with inlet and outlet sides;
a fluid duct between and communicating with said outlet opening and the inlet side of the pump;
a fluid delivery line between and communicating with the outlet side of the pump and the vessel and a filter unit assembly in the tank and connected with the outlet opening, whereby oil in the tank flows through the assembly and particulate impurities are separated therefrom as it flows to said outlet opening, said pump operates to establish a negative pressure in the tank, whereby oil from the supply of oil flows into the tank and is acted upon by said minus pressure, whereby gaseous impurities separate therefrom and operates to draw oil in the tank through the filter unit assembly from the tank and thence into said vessel

1 more element

Dependencies are inferred from the claim text.