Double-layer filter strcutre
AssigneeInsonic Company
InventorHideo ISHIKURA
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Abstract
The instant disclosure relates to a double-layer filter structure disposed in an oil filter. The double-layer filter structure includes two individual filter media for removing impurities of different sizes in the engine oil. The double-layer filter structure includes a first filter medium and a second filter medium. The first filter medium has a plurality of wave-shaped and annularly arranged first folding portions. Similarly, the second filter medium has a plurality of wave-shaped and annularly arranged second folding portions. Each of the first folding portions has a mating portion retained by the second folding portions correspondingly.
Claims6
A double-layer filter structure, comprising:
- a first filter medium having a plurality of wave-shaped and annularly arranged first folding portions;
- and
- a second filter medium having a plurality of wave-shaped and annularly arranged second folding portions, wherein the first filter medium is surrounded by the second filter medium, while each of the first folding portions has a mating portion retained by the second folding portions correspondingly.
Dependencies are inferred from the claim text.