EP1077074A2 - Filtre nasal et son procédé de fabrication - Google Patents

Filtre nasal et son procédé de fabrication Download PDF

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Publication number
EP1077074A2
EP1077074A2 EP00202857A EP00202857A EP1077074A2 EP 1077074 A2 EP1077074 A2 EP 1077074A2 EP 00202857 A EP00202857 A EP 00202857A EP 00202857 A EP00202857 A EP 00202857A EP 1077074 A2 EP1077074 A2 EP 1077074A2
Authority
EP
European Patent Office
Prior art keywords
filter
nasal
filter housing
housing
disc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00202857A
Other languages
German (de)
English (en)
Other versions
EP1077074A3 (fr
Inventor
Holger J. Dr. Schulze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RAEUSCHER KHANH PHUONG
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1077074A2 publication Critical patent/EP1077074A2/fr
Publication of EP1077074A3 publication Critical patent/EP1077074A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/06—Nose filters

Definitions

  • the invention relates to a nasal filter and a method for its production, the nasal filter can be used in particular in people who are sensitive to pollen, dust, microspores etc. as allergy sufferers and can also be worn by people who are in sterile rooms, for. B. work in the hospital area (operating room).
  • Nasal filters are well known and are also described several times in the patent literature.
  • WO 99/11326 discloses a nasal filter which is used as a compact body in each nasal passage separately.
  • the filter body in cylindrical form, is enclosed by a porous fabric and has a brim-like widening on the side facing the nostril.
  • the disadvantage of this solution lies in the fact that the shape of the nasal cavity (nasal passage) is not individually adapted to the wearer and the sealing against "foreign air" passing through is only achieved via the edge provided with an adhesive component. The comfort of this solution, which is very simple, takes some getting used to for the user.
  • a filter device is presented in WO 95/33520, the special feature of which is that 2 Filter elements are connected to one another in one plane using a handle. Every filter element consists of an annular frame made of deformable latex material, which is the real thing Holds the filter element in position. The bridge, which is kinked in the middle, lies on the nasal septum and is used to remove the filter device if necessary.
  • the filter element is like this processed that it has a disc-shaped shape and by the flexible latex frame essentially adapts to the circumstances of the nasal passage. The disadvantage of this solution then there is that leaks can still be permitted due to inexact fit and the effect of collecting z. B. cereal pollen, dust mites or other microspores are not is guaranteed.
  • an air filter for insertion into the nostril which consists of plug-in bodies connected in parallel, the filter effect being achieved by interchangeable filter elements.
  • a so-called “chimney effect" to increase the air throughput is not even effective. It is also to be feared that, due to the elastic connecting bridge between the two plug-in bodies, these are inclined towards one another, so that secondary air can pass unfiltered, especially since no further sealing measures are provided on the surfaces of the plug-in bodies.
  • the invention is therefore based on the object of offering a solution which overcomes the disadvantages of the prior art and is particularly aimed at realizing a secure fit of the filter with optimum filtering action and high wearing comfort.
  • the object is achieved in that the nasal filter is designed in the combination of the individual components to form a filter unit and steps for its expedient manufacture are specified.
  • the two filter housings arranged parallel to each other essentially have one cylindrical shape and are ergonomically reshaped the nose interior, also for Support of holding the shape of so-called nasal olives can be used.
  • This post-forming is made possible by physiologically harmless and thermally or machinable materials, such as. B. polymeric plastics are used. These also have the advantage that they are odorless and can be individually colored. Inside there is a cylindrical to oval cavity with a predominantly oval opening at the lower end. As a special feature, the opening facing the inside of the nose has a circumferential edge directed inwards by 90 °, to which a filter disk is attached by means of injection molding or thermal welding. This ensures that the absolute tightness between the filter housing and the filter disc is permanently ensured. The filter disk also takes on an oval shape, following the shape of the lower opening of the filter housing.
  • the filter disk in the opposite manner, on Entrance of the filter housing (s) is placed and thus an increase in the filter area and of the volume is accessible.
  • the thickness of the filter disc can be varied to achieve a volume filter can be increased.
  • the filter housing has 3 basic shapes, which are based on the typical peculiarities of the nasal passages of male and female adults and children, these basic shapes being individually adaptable.
  • the cavity of each filter housing has a very smooth surface, which has a positive influence on the flow resistance.
  • For an optimal fit of the filter housings to be inserted in parallel, their outer surface is micro-roughened, this effect being supported by elongated lamellar incisions in the upper area of the filter housings. This constructive training and the individual post-forming particularly exclude the passage of "secondary air".
  • the micro-roughening of the two filter housings can also be omitted if a concentric corrugation is provided on the circumference thereof instead.
  • filter bodies made of physiologically and physically suitable plastic foam, without filter housing, to form, which are only connected to each other with a web.
  • the plastic foam fulfills all requirements with regard to the filter properties in the micron range and also the mechanical properties with regard to flexibility, dimensional stability Compressibility.
  • the inside of the filter disc contains a thin fleece made of split filter fibers can also be assigned to the polymeric plastics, which have a cover fleece on both Sides are enclosed.
  • the permanent static charge of the "inner” fibers causes maximum adhesion of microspores and others contained in the air we breathe Particle.
  • the material used for the filter discs corresponds to that for medical Purposes z. B. is used in operations on humans and animals.
  • the design of the filter housing and especially the use of split filter fibers in the filter disk increases the filter effect through "spatial effect" and offers a comparatively higher filter capacity and service life as well as more comfortable wearing properties than with conventional surface filters. So that an optimal and even fit of 2 filter housings and filter disks is guaranteed, these are connected to each other via a web, which is also made of polymer plastic.
  • the web length is adapted to the corresponding conditions of the wearer, the web width being up to approx. 5 mm and the thickness of the web being up to approx. 0.5 mm.
  • the thickness of the web always corresponds to the wall thickness of the filter housing.
  • the two ends of a web which is curved approximately in a semicircle, sit flush on the lower part of each filter housing and are fixed there thermally or by gluing to the filter unit.
  • the manufacture of the nasal filter should be illustrated by the steps described below:
  • polymeric plastic such as. B. polyethylene, Polyprophylen used. This material is easy to treat thermally and by machining.
  • the outer basic shape of the filter housing corresponds essentially to the design of the Nasal cavity of male and female adults and children and is on the way of a previous "model impression" of the nasal passage and the nasal septum reshaped to the special circumstances.
  • Elastomeric are used as impression materials irreversible materials based on silicone are used.
  • this "model impression" is used to adapt the basic shape (outer shape) of the filter housing to the individual circumstances of the wearer, by means of a corresponding casting of the polymer plastic over this "model impression”.
  • the surface of the filter housing is micro-roughened, for example by spark erosion, as a result of which a precise, non-slip fit is achieved.
  • the “inner” surface of the filter housing is kept very smooth and it is on the top Side of the filter housing by means of thermal shaping an inward-facing circumferential Support edge for the filter disc to be applied there.
  • the latter is then either during or after injection molding or during or after a deep-drawing process by means of thermal welding firmly connected to the filter housing.
  • the last step is the Positioning and fastening of the web that connects the two filter housings to each other, on the lower and inner side of the filter housing in flush form by means of thermal Welding or gluing.
  • the 3 basic shapes mentioned at the beginning can be created the filter housing with regard to the manufacture of the filter housing from the known Nose olives can be varied in a total of up to 36 basic forms. It is also provided here that CAD models in the injection molding process with simultaneous injection molding of the web and with produce simultaneous or subsequent welding of the filter material.
  • the nasal filter is understood as a combination of individual elements that form a filter unit merge.
  • the nasal filter has 2 connected to one another in parallel via a semicircular web 9
  • These filter housings 1, 2 consist primarily of polymeric plastics, especially polyolefins, such as. B. polyethylene, polypropylene or other thermally have it reworked.
  • the walls of the filter housings 1, 2 have a thickness of approximately 0.5 mm, which also corresponds to the thickness of the semicircular web 9.
  • the filter housings 1, 2 have a smooth surface 4, with their lower end an edge 3 directed inwards by 90 ° is arranged. With this, a filter disc 6 is fixed connected.
  • This filter disc 6 consists of split filter fibers 8, each on both Sides are covered by the cover fleece 7.
  • the filter housings 1, 2 have a micro-roughened Surface 5, in order to improve the fit at the lower end in the filter housing 1, 2nd lamellar incisions 10 are introduced.
  • the inward peripheral edge 3 has a width of approx. 1 mm.
  • the connection of the filter housing 1, 2 by means of a semicircular Web 9 is designed so that no offset to the outer wall of the filter housing 1, 2 occurs.
  • the inlet opening of the filter housing 1, 2, the inward edge 3 and thus also the Filter disc 6 have an oval shape to ensure maximum air passage on.
  • the filter disk 6 can also be located at the outward opening the filter housing 1, 2 may be attached in variable thickness. This can advantageously the filter area and the filter volume are increased and the "spatial effect" is increased. Finally, the tight fit of the filter housings 1, 2 can be further improved in that instead of micro-roughening the surfaces, the filter housings 1, 2 are arranged concentrically Ripple 13 received.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP00202857A 1999-08-14 2000-08-14 Filtre nasal et son procédé de fabrication Withdrawn EP1077074A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19938610 1999-08-14
DE1999138610 DE19938610A1 (de) 1999-08-14 1999-08-14 Nasenfilter und Verfahren zu dessen Herstellung

Publications (2)

Publication Number Publication Date
EP1077074A2 true EP1077074A2 (fr) 2001-02-21
EP1077074A3 EP1077074A3 (fr) 2001-09-19

Family

ID=7918424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00202857A Withdrawn EP1077074A3 (fr) 1999-08-14 2000-08-14 Filtre nasal et son procédé de fabrication

Country Status (2)

Country Link
EP (1) EP1077074A3 (fr)
DE (1) DE19938610A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1340522A3 (fr) * 2002-02-14 2003-10-29 Adrian John Soper Dispositif de filtration nasale
GB2354952B (en) * 1999-08-27 2004-05-12 Adrian John Soper The hay fever guard
WO2007002979A1 (fr) * 2005-07-01 2007-01-11 Robair Wartan Dallal Filtre à air pour masque élaboré

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB886056A (en) 1958-12-22 1962-01-03 Henry Louis Pierre Berge Improved protective device for respiratory tracts
DE8804725U1 (de) 1988-04-11 1988-05-26 Weng, Kuo-Chin, Chiayi City Luftfilter zur Einführung in die Nasenöffnungen
WO1995033520A1 (fr) 1994-06-02 1995-12-14 Noreen Hurlin Dispositif de filtration
WO1999011326A1 (fr) 1997-09-03 1999-03-11 Amtec Products, Inc. Filtre nasal perfectionne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR830545A (fr) * 1937-12-08 1938-08-02 Appareil nasal destiné à filtrer, aseptiser, imprégner ou modifier l'air respiré
CH662742A5 (en) * 1984-01-11 1987-10-30 Reinhold Beister Nose plug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB886056A (en) 1958-12-22 1962-01-03 Henry Louis Pierre Berge Improved protective device for respiratory tracts
DE8804725U1 (de) 1988-04-11 1988-05-26 Weng, Kuo-Chin, Chiayi City Luftfilter zur Einführung in die Nasenöffnungen
WO1995033520A1 (fr) 1994-06-02 1995-12-14 Noreen Hurlin Dispositif de filtration
WO1999011326A1 (fr) 1997-09-03 1999-03-11 Amtec Products, Inc. Filtre nasal perfectionne

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2354952B (en) * 1999-08-27 2004-05-12 Adrian John Soper The hay fever guard
EP1340522A3 (fr) * 2002-02-14 2003-10-29 Adrian John Soper Dispositif de filtration nasale
WO2007002979A1 (fr) * 2005-07-01 2007-01-11 Robair Wartan Dallal Filtre à air pour masque élaboré

Also Published As

Publication number Publication date
EP1077074A3 (fr) 2001-09-19
DE19938610A1 (de) 2001-02-22

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