Dual flow filter
First Claim
1. A filter unit for the filtration of a pressurised liquid comprising:
- a closed housing having an inlet for liquid to be filtered, and main and secondary outlets for liquid which has been filtered;
a main filter element arranged in the housing and having an unfiltered fluid surface exposed to the majority of the liquid flow supplied under pressure to the housing inlet, flow through the main filter being directed to the main outlet from the housing;
a secondary filter element having an unfiltered fluid surface exposed to a portion of the liquid flow supplied under pressure to the housing inlet, flow through the secondary filter being directed to the secondary outlet from the housing;
wherein the main filter element offers a low resistance to the flow of fluid therethrough relative to the secondary filter element so that the majority of the flow through the inlet is filtered by the main filter element and the remainder by the secondary filter element.
2 Assignments
0 Petitions
Accused Products
Abstract
A dual flow filter unit for the filtration of a pressurized liquid such as oil, comprising a closed housing (10) having an inlet (31), and main and secondary outlets (32, 13) for that liquid. The unit further comprises a main filter element (21) arranged in the housing (10) and having an unfiltered fluid surface exposed to the majority of the liquid flow, the flow through the main filter (21) being directed to the main outlet (32) from the housing (10); and a secondary filter element (17) exposed to a portion of the liquid flow supplied to the housing inlet (31), any flow through the secondary filter being directed to the secondary outlet (13) from the housing. The main filter element (21) offers a low resistance to the flow of fluid therethrough relative to the secondary filter element (17) so that the majority of the flow through the inlet (31) is filtered by the main filter element (21) and the remainder by the secondary filter element (17). This allows better filtration of the liquid without adversely affecting the flow rate or pressure thereof.
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Citations
16 Claims
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1. A filter unit for the filtration of a pressurised liquid comprising:
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a closed housing having an inlet for liquid to be filtered, and main and secondary outlets for liquid which has been filtered;
a main filter element arranged in the housing and having an unfiltered fluid surface exposed to the majority of the liquid flow supplied under pressure to the housing inlet, flow through the main filter being directed to the main outlet from the housing;
a secondary filter element having an unfiltered fluid surface exposed to a portion of the liquid flow supplied under pressure to the housing inlet, flow through the secondary filter being directed to the secondary outlet from the housing;
wherein the main filter element offers a low resistance to the flow of fluid therethrough relative to the secondary filter element so that the majority of the flow through the inlet is filtered by the main filter element and the remainder by the secondary filter element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification