US5616169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal-free and frame-free odor and/or pollutant filter
Assignee: Individual
•
Filing: 1995-06-19
•
Granted: 1997-04-01
•
Expires: 2015-06-19
Abstract
Abstract A seal-free and frame-free odor and/or pollutant filter, e.g., in air conditioners and motor vehicles, having a self-supporting and elastic adsorption filter bed installed under slight compression in air supply ducts. The filter bed is made of a highly air-permeable substrate material and an adsorbent affixed thereto by an adhesive mass.
Inventors
- 👤 Ernest de Ruiter
- 👤 Jonas Tornblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:37
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28042; B01J20/28045; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1669; B01D39/1676; B01J20/28002; B01J20/28004; B01J20/28011; B01J20/28016; B01J20/28019; B01J20/28054; B01J20/28057; B01J20/28069; B01J20/28095; B01J20/28097; Y; Y10; Y10S; Y10S55/00; Y10S55/42
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
90 words
A process for filtering air in air supply duct, comprising the step of installing a self-supporting elastic adsorption filter bed under compression in the air supply duct in a seal-free and frame-free manner, the filter bed being made of a highly air-permeable substrate material, an adsorbent fixed to the substrate material in an amount of 50 to 400 g/l, and an adhesive mass for fixing the adsorbent to the substrate material, the substrate material having a compressibility of at least 2% under a pressure of 1 to 10N/cm 2 .
Claim 2
Dependent Claim
90 words
A process for filtering air in air supply duct, comprising the step of installing a self-supporting elastic adsorption filter bed under compression in the air supply duct in a seal-free and frame-free manner, the filter bed being made of a highly air-permeable substrate material, an adsorbent fixed to the substrate material in an amount of 50 to 400 g/l, and an adhesive mass for fixing the adsorbent to the substrate material, the substrate material having a compressibility of at least 2% under a pressure of 1 to 10N/cm 2 .
Claim 3
Dependent Claim
78 words
A seal-free and frame-free filter for installation in an air supply duct, consisting essentially of a self-supporting elastic adsorption filter bed, wherein said filter bed is made of a highly air-permeable substrate material, an adsorbent fixed to the substrate material in an amount of 50 to 400 g/l, and an adhesive mass for fixing the adsorbent to the substrate material, the substrate material having a compressibility of at least 2% under pressure of 1 to 10N/cm 2 .
Claim 4
Dependent Claim
78 words
A seal-free and frame-free filter for installation in an air supply duct, consisting essentially of a self-supporting elastic adsorption filter bed, wherein said filter bed is made of a highly air-permeable substrate material, an adsorbent fixed to the substrate material in an amount of 50 to 400 g/l, and an adhesive mass for fixing the adsorbent to the substrate material, the substrate material having a compressibility of at least 2% under pressure of 1 to 10N/cm 2 .
Claim 5
Dependent Claim
18 words
A filter as defined in claim 2, wherein the air-permeable substrate material is a large-pore reticulated PU foam.
Claim 6
Dependent Claim
29 words
A filter as defined in claim 3, wherein the PU foam has a skeleton, the adsorbent being fixed to the skeleton of the PU foam by the adhesive mass.
Claim 7
Dependent Claim
22 words
The filter as defined in claim 3, wherein the PU foam has a porosity of 8 to 30 pores per inch (ppi).
Claim 8
Dependent Claim
29 words
A filter as defined in claim 3, wherein the adsorbent has a particle size that is at least three times smaller than a pore diameter of the PU foam.
Claim 9
Dependent Claim
24 words
A filter as defined in claim 2, wherein a plurality of adsorption filter beds are provided to form a single multi-layered adsorption filter bed.
Claim 10
Dependent Claim
20 words
A filter as defined in claim 2, wherein the adsorption filter bed has a thickness between 5 and 40 mm.
Claim 11
Dependent Claim
19 words
A filter as defined in claim 8, wherein the adsorption filter has a thickness between 10 and 30 mm.
Claim 12
Dependent Claim
13 words
A filter as defined in claim 2, wherein the adsorbent is activated charcoal.
Claim 13
Dependent Claim
22 words
A filter as defined in claim 2, wherein the adsorbent is spherical activated charcoal having a diameter of 0.2 to 2 mm.
Claim 14
Dependent Claim
20 words
A filter as defined in claim 11, wherein the spherical activated charcoal has a diameter of 0.3 to 1 mm.
Claim 15
Dependent Claim
26 words
A filter as defined in claim 11, wherein the spherical activated charcoal has an inner surface area of at least 900 m 2 /g (BET method).
Claim 16
Dependent Claim
30 words
A filter as defined in claim 11, wherein the spherical activated charcoal has a diameter of 0.5 mm, the spherical activated charcoal having a bursting pressure of at least 10N.
Claim 17
Dependent Claim
20 words
A filter as defined in claim 14, wherein the spherical activated charcoal has a bursting pressure of at least 30N.
Claim 18
Dependent Claim
38 words
A filter as defined in claim 2, wherein the adsorbent is one of splint and granular coal having a diameter of 0.2 to 2 mm and an inner surface area at least equal to 900 m 2 /g.
Claim 19
Dependent Claim
18 words
A filter as defined in claim 16, wherein the adsorbent has a diameter of 0.3 to 1 mm.
Claim 20
Dependent Claim
29 words
A filter as defined in claim 2, wherein the adsorbent is a carbonized and activated porous polymer based on one of sulfonated styrene-divinyl-benzol copolymers and sulfonated styrene-acrylic acid copolymers.
Claim 21
Dependent Claim
29 words
A filter as defined in claim 2, wherein the adsorbent is a carbonized and activated cation exchanger based on one of sulfonated styrene-divinyl-benzol copolymers and sulfonated styrene-acrylic acid copolymers.
Claim 22
Dependent Claim
34 words
A filter as defined in claim 2, wherein the adsorbent is a carbonized and activated anion exchanger based on one of polystyrene resins and polyacrylic resins having one of tertiary and quaternary amino groups.
Claim 23
Dependent Claim
28 words
A filter as defined in claim 2, wherein the adsorbent is a porous polymer based on a copolymer of styrene and divinyl benzole cross-linked via CH 2 bridges.
Claim 24
Dependent Claim
19 words
A filter as defined in claim 2, wherein the adsorbent is formed of form particles of hydrophobic molecular sieves.
Claim 25
Dependent Claim
25 words
A filter as defined in claim 2, wherein the adsorbent is fixed in the adsorption filter bed in an amount of 150 to 350 g/l.
Claim 26
Dependent Claim
22 words
A filter as defined in claim 2, wherein the adhesive mass has a weight equal to that of the substrate material ±50%.
Claim 27
Dependent Claim
14 words
A filter as defined in claim 2, wherein the adhesive mass contains cross-linkable polymers.
Claim 28
Dependent Claim
29 words
A filter as defined in claim 25, wherein the organic cross-linkable polymers are selected from the group consisting of derivatives of acrylic acid, polyurethane, polystyrene, polyisocyanate and polyvinyl acetate.
Claim 29
Dependent Claim
38 words
A filter as defined in claim 25, wherein the adhesive mass includes a pre-polymeric low-solvent two-component system based on at least one of masked diisocyanates and polyisocyanate, which are cross-linked to at least one of diamines and polyamines.
Claim 30
Dependent Claim
15 words
A filter as defined in claim 2, wherein the adhesive mass includes a hot-melt adhesive.
Claim 31
Dependent Claim
17 words
A filter as defined in claim 2, wherein the adhesive mass contains non-masked polymeric diisocyanates and polyisocyanates.
Claim 32
Dependent Claim
24 words
A filter as defined in claim 2, wherein the adsorption filter bed is curved in a convex manner opposite to an air flow direction.
Claim 33
Dependent Claim
22 words
A filter as defined in claim 2, and further comprising additional reinforcement means placeable between a plurality of the adsorption filter beds.
Claim 34
Dependent Claim
95 words
A combination, comprising an air supply duct and a seal-free and frame-free odor and pollutant filter, the filter comprising a self-supporting elastic adsorption filter bed made of a highly-air permeable substrate material, an adsorbent fixed to the substrate material in an amount of 50 to 400 g/l, and an adhesive mass for fixing the adsorbent to the substrate material, the substrate material having a compressibility of at least 2% under a pressure of 1 to 10N/cm 2 , the filter being arranged in the air supply duct under compression in a seal-free and frame-free manner.
Claim 35
Dependent Claim
95 words
A combination, comprising an air supply duct and a seal-free and frame-free odor and pollutant filter, the filter comprising a self-supporting elastic adsorption filter bed made of a highly-air permeable substrate material, an adsorbent fixed to the substrate material in an amount of 50 to 400 g/l, and an adhesive mass for fixing the adsorbent to the substrate material, the substrate material having a compressibility of at least 2% under a pressure of 1 to 10N/cm 2 , the filter being arranged in the air supply duct under compression in a seal-free and frame-free manner.
Claim 36
Dependent Claim
19 words
A combination as defined in claim 32, wherein the air supply duct is an air conditioner air supply duct.
Claim 37
Dependent Claim
19 words
A combination as defined in claim 32, wherein the air supply duct is a motor vehicle air supply duct.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-31 | 2000-09-30 | 2001-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-31 | 2004-09-30 | 2005-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-31 | 2008-09-30 | 2009-04-01 | $7700.00 | Window Closed / Lapsed |