Filtering element made of absorbent paper material in the form of a tubular cylinder
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United States of America Patent
Stats
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Apr 5, 2005
Grant Date -
N/A
app pub date -
Feb 8, 2001
filing date -
Aug 4, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a filter system (10) including a filter element (14) for filtering a fluid within a cylindrical case (12). The filter element is an absorbent tissue paper material in the form of a sheet compactly wound to form inner winding turns therein and to form a tubular cylinder inside the case (12) in a manner to partition a radially outside part (26) from a radially inside part (30). The axial ends of the filter element are capped by the closed ends (18, 20) of the case. The inner winding turns exhibit a contour which prevents the inner winding turns from unraveling inward. In operation, the fluid moves across the filter element (14) in a generally centripetal direction. The filter element (14) is characterized in that it is devoid of a central core.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- B01D Class
- 3.72 % this patent is cited more than
- 20 Age