Filter element
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United States of America Patent
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-
Nov 16, 2004
Grant Date -
Jun 12, 2003
app pub date -
Nov 25, 2002
filing date -
Nov 26, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filter element is made of a first filtering member, and a second filtering member that is arranged on a downstream side of the first filtering member and is impregnated with an oil. The first filtering member consists of a downstream wet layer that is impregnated with the oil, which is transferred by contact to the second filtering member, and an upstream dry layer that is not impregnated with the oil. A density of the first filtering member may be set smaller than that of the second filtering member.
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