Patent ID: 7014761

Claim:
An environmentally friendly dual lube filter cartridge containing no metal parts, and comprising in combination: a non metallic venturi centertube having a venturi throat and at least one venturi port, a bypass filter coaxial with the venturi centertube, ribs on the venturi centertube for creating a first flow passage between the bypass filter and the venturi centertube for dual filtered fluid, a full flow filter having a non-metallic centertube and mounted coaxial with the bypass filter, the full flow centertube having a bore which is larger than the outer periphery of the bypass filter to create a second flow passage for single filtered fluid, a first plastic endcap sealing an end of the bypass filter to an end of the venturi centertube, the first endcap having standoffs for creating a flow path for single filtered fluid from the second flow passage to the venturi centertube, a second plastic endcap joining the full flow filter, the bypass filter and the venturi centertube, the second endcap having a central passage connected to the venturi centertube for flow of fluid from the cartridge, the second endcap also having an annular groove for receiving a skirt-like radial seal gasket positioned near the periphery of the full flow filter, and a third endcap enclosing the upper end of the cartridge and sealingly joined to the full flow filter element, the standoffs on the first endcap providing flow passages between the bypass element and the third endcap, the third endcap having an annular peripheral groove for carrying an axial seal gasket.