EP0206336A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Filter element
Assignee: OFFERTA DI LICENZA AL PUBBLICO
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Filing: 1986-06-25
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Granted: —
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Expires: 2006-06-25
Abstract
Abstract The filter element of the present has a plurality of wavy portions which are so arranged that a plurality of wavy portions make a generally ring like structure. In order to reduce the pressure drop when the fluid flows through the filter element, the present filter element has a special shaped radial gaps. Namely, the width of a first radial gaps, which is formed within adjacent wavy portions and which connects with an inner space formed at the center of the generally ring like structure, increases from the outer end thereof to the inner end thereof. The width of a second radial gap, which is connected with outer atmosphere, decreases from the outer end thereof to the inner end thereof. Both axial ends of the wavy portions are covered with the adhesive sheet on which adhesive layer is cladded.
Inventors
- 👤 Yoshihiro Taki
- 👤 Susumu Miyakawa
- 👤 Hajime Akado
- 👤 Hitoshi Harada
- 👤 Satoshi Inukai
- 👤 Atsushi Sakaida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 11:13
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/005; B01D27/04; B01D27/06; B01D29/00; B01D29/01; B01D29/016; B01D2201/00; B01D2201/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
131 words
(1) Filter element comprised of: a filter member; said filter member being bent to be zigzag for forming a plurality of wavy portions; said wavy portions being so arranged that a plurality of said wavy portions makes a generally ring like structure having an inner space at substantially center thereof, and that a plurality of first and second radial gaps are made within adjacent said wavy portions, said first radial gaps opening to said inner space through an inner end thereof and closing an outer end thereof; said second radial gaps being shut from said inner space and opening to outer atmosphere through an outer end thereof; at least one of said first radial gap and said second radial gap having a width thereof varying along with a radial line thereof.
Claim 2
Dependent Claim
25 words
(2) A filter element claimed in claim 1, wherein: the width of said first radial gap increasing from said outer end to said inner end;
Claim 3
Dependent Claim
37 words
(3) A filter element claimed in claim 1, wherein: the width of said first radial gap increasing gradually from said outer end to said inner end so that a shape of said first radial gap is taper.
Claim 4
Dependent Claim
25 words
(4) A filter element claimed in claim 3, wherein: an including angle of the taper shape of said first radial gap is at least 4°.
Claim 5
Dependent Claim
25 words
(5) A filter element claimed in claim 3, wherein: an inclining angle of the taper shape of said first radial gap is at least 5°.
Claim 6
Dependent Claim
25 words
(6) A filter element claimed in claim 1, wherein: the width of said second radial gap decreasing from said outer end to said inner end;
Claim 7
Dependent Claim
37 words
(7) A filter element claimed in claim 1, wherein: the width of said second radial gap decreasing gradually from said outer end to said inner end so that a shape of said second radial gap is taper.
Claim 8
Dependent Claim
25 words
(8) A filter element claimed in claim 7, wherein: an inclining angle of the taper shape of said second radial gap is at least 4°.
Claim 9
Dependent Claim
25 words
(9), A filter element claimed in claim 7, wherein: an inclining angle of the taper shape of said second radial gap is at least 5°.
Claim 10
Dependent Claim
66 words
(10) A filter element claimed in claim 1, wherein: the width of said first radial gaps increasing gradually from said outer end to said inner end so that a shape of said first radial gap is taper; and the width of said second radial gap decreasing gradually from said outer end to said inner end so that a shape of said second radial gap is taper.
Claim 11
Dependent Claim
31 words
(11) A filter element claimed in claim 10, wherein: an inclining angle of the taper shape of said first radial gap is the same as that of said second radial gap.
Claim 12
Dependent Claim
61 words
(12) A filter element claimed in claim 1, further comprising an adhesive sheet having a soft base made of an anti-heat material and a resin adhesive layer provided on a surface of said base; said adhesive sheet being attached on an axial end surface of said filter member so that said adhesive sheet and said filter member makes a closed chamber.
Claim 13
Dependent Claim
34 words
(13) A filter element claimed in claim 12; wherein, said base is made of a material chosen from a group of kraft paper, masking paper, aluminum film, steel film, nickel film and copper film.
Claim 14
Dependent Claim
28 words
(14) A filter element claimed in claim 12; wherein, said adhesive layer is made of heat melt type resin adhesive chosen from a group of polyamide and polyster.
Claim 15
Dependent Claim
20 words
(15) A filter element claimed in claim 12; wherein, a thickness of said base is between 10 - 200 µm.
Claim 16
Dependent Claim
21 words
(16) A filter element claimed in claim 14; wherein, a thickness of said adhesive layer is between 50 - 600 pm.
Claim 17
Dependent Claim
20 words
(17) A filter element claimed in claim 16; wherein, a viscosity of said adhesive is between 5 - 15,000 poise.
References Cited (Backward Citations)
No citation records indexed.
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