EP0286016B1 - Halbmaskenförmig ausgebildeter Schwebstoffilter - Google Patents

Halbmaskenförmig ausgebildeter Schwebstoffilter Download PDF

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Publication number
EP0286016B1
EP0286016B1 EP88105244A EP88105244A EP0286016B1 EP 0286016 B1 EP0286016 B1 EP 0286016B1 EP 88105244 A EP88105244 A EP 88105244A EP 88105244 A EP88105244 A EP 88105244A EP 0286016 B1 EP0286016 B1 EP 0286016B1
Authority
EP
European Patent Office
Prior art keywords
edge
mask
filter
frame
cover
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.)
Expired - Lifetime
Application number
EP88105244A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0286016A1 (de
Inventor
Joachim Schlobohm
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of EP0286016A1 publication Critical patent/EP0286016A1/de
Application granted granted Critical
Publication of EP0286016B1 publication Critical patent/EP0286016B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A62B23/02—Filters for breathing-protection purposes for respirators
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • A62B18/025—Halfmasks

Definitions

  • the invention relates to a half-mask-shaped particulate filter according to the features of the preamble of claim 1.
  • Such half masks are used, for example, as dust filters underground or as light protective masks in work areas in which dust-like or droplet-shaped particles that damage the respiratory tract can occur.
  • Such a half mask has been described in GB-A-974 960.
  • the known particulate filter is clamped between a cover and a frame.
  • the edge of the lid overlaps the filter edge and lies directly on the frame.
  • the filter edge is set back compared to the contact line between the lid edge and the frame, so that the contact line can act as a self-tensioning sealing line.
  • the attached lid must sit on the frame in an exciting way.
  • the short filter edge does not hold the filter insert securely on the frame when the cover is removed.
  • the lid must be placed on the filter insert with extreme care so that the short edge support of the filter is not accidentally shifted by the precisely fitting lid edge. This would reduce the filter effect. It is also not possible to check whether the edge of the filter has remained completely lying on the frame when the cover is replaced. This means considerable uncertainty for use.
  • Another known half mask according to DE-A-30 32 437 exists inter alia. from a pleated dust filter, the edge of which is drawn over the bulge-shaped frame as a sealing edge and lies pressed around the bulge and pressed inwards. To secure the filter in a non-slip manner, a holding frame is stretched around the edge of the mask, to which the drawstring is also attached.
  • the attached half mask has only the filter material visible from the outside as the mask body, which is therefore exposed to mechanical influences without protection from mechanical damage. Furthermore, the filter material, which is turned around the sealing edge, must take over the sealing function between the mask edge and the face of the mask wearer. Damage to both the filtering part of the half mask and the filter part acting as a sealing surface and resting on the face lead to a noticeable and undesirable reduction in filter performance.
  • the filter structure may loosen due to unavoidable friction of the sealing edge on the skin surface, so that both a fragmentary dissolution of the filter material and crack formation and thus undesirable leaks can occur.
  • the present invention is therefore based on the object to improve a half-mask-shaped particulate filter of the type mentioned so that effective protection against external mechanical damage, a smooth and clean, resistant sealing surface on the edge of the mask and a problem-free, easy to handle replacement of the filter can be achieved.
  • a used filter insert can be replaced in a simple manner by detaching the cover from the frame, removing the used filter insert and inserting a new one into the cover.
  • the lid and the new filter insert are then pressed onto the frame and clamped in with a single simple movement. This ensures that the filter insert is held tightly on the frame.
  • the bulge-shaped part of the frame that lies against the face of the mask wearer remains free of filter material, so that a clean and tight fit with the aid of the head harness is ensured even during a hard operation.
  • the lid rim presses the edge area against the outer fit of the frame when the filter insert is clamped.
  • the edge support of the filter insert always lies tightly around the frame; when replacing the insert, as with the previously known insert, care must not be taken to ensure that the filter edge is placed on it carefully, because it is held securely flat (and not only in a contact line) by the subsequent fitting and additional clamping of the cover.
  • the exact position of the filter insert can also be checked when the cover is in place, since the entire edge area of the filter between the edge of the cover and the frame is clearly visible when securely installed.
  • the edge area of the filter is designed as a fold-over brim in which the lid edge is inserted. This enables the filter insert to be securely seated in the cover while it is being replaced.
  • the train connection is expediently designed as a fastening for the head harness.
  • the drawstring and the cover attachment on the frame attack the same attachment point.
  • a simple double fastening for the lid and the frame is obtained, which is easy to handle and inexpensive to manufacture.
  • a particularly good tensioning effect is achieved in that the tab fastening acts on the outer edge of the lid.
  • the head strap then not only causes the frame to lie against the face of the mask wearer, but at the same time the lid is pressed against the frame and thus ensures a constant tension on the edge area of the filter insert even during a hard operation.
  • a reinforcing strip can be attached along the inner surface of the frame.
  • a half-mask-shaped particulate filter is shown in section, which has a frame (1), which is designed in its shape as a sealing edge conformable to the face of the mask wearer, over which a cover (2) is placed, in which the filter insert trained particulate filter (3) is used.
  • the filter insert (3) is pressed in its edge area (4) by the lid edge (5) against the outer contour of the sealing edge (1).
  • the edge area (4) of the filter insert (3) is turned around the lid edge (5) into a brim (7).
  • a reinforcing strip (8) is attached to the contact surface between the lid edge (5) and the edge area (4) of the filter insert (3) along the inner surface of the sealing edge (1).
  • rubber-elastic tabs (9) are formed on the circumference of the sealing edge (1). The ends (10) of the tabs (9) can be buttoned in via the buttons (12) which are arranged along the outer surface of the lid edge (5) at the same distance from one another as the tabs (9) along the sealing edge (1) are .
  • buttons (12) are attached to the buttons (12), in which the head band (11), which is designed as an endless elastic band, is accommodated in a slightly displaceable manner.
  • the head harness (11) can thereby adapt itself to the various needs, be it that the device is in standby with an enlarged loop around the neck or held in operation with both loops over the back of the head.
  • the cover (2) is provided with openings (14).
  • the tabs (9) are opened, the cover (2) is detached from the frame (1) and the suspended particle filter (3) now exposed is removed from the cover (2) and a new one is inserted.
  • the brim (7) is placed around the edge of the cover (5) so that the filter insert (3) is fixed in its position and the cover (2) with the filter insert (3) can be placed on the sealing edge (1) without slipping .

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Pulmonology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP88105244A 1987-04-04 1988-03-31 Halbmaskenförmig ausgebildeter Schwebstoffilter Expired - Lifetime EP0286016B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3711505 1987-04-04
DE3711505A DE3711505A1 (de) 1987-04-04 1987-04-04 Halbmaskenfoermig ausgebildeter schwebstoffilter

Publications (2)

Publication Number Publication Date
EP0286016A1 EP0286016A1 (de) 1988-10-12
EP0286016B1 true EP0286016B1 (de) 1991-02-20

Family

ID=6324938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105244A Expired - Lifetime EP0286016B1 (de) 1987-04-04 1988-03-31 Halbmaskenförmig ausgebildeter Schwebstoffilter

Country Status (4)

Country Link
EP (1) EP0286016B1 (enrdf_load_stackoverflow)
DE (2) DE3711505A1 (enrdf_load_stackoverflow)
ES (1) ES2021779B3 (enrdf_load_stackoverflow)
ZA (1) ZA88616B (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8903266D0 (en) * 1989-02-14 1989-04-05 Hellberg Int Ltd Holder for respirator
JP4927262B2 (ja) * 2001-03-23 2012-05-09 株式会社重松製作所 ろ過材及び該ろ過材を用いた使い捨て式防じんマスク
CN116096463A (zh) * 2020-07-01 2023-05-09 耐普罗有限公司 带有可更换的滤芯和组件的面罩

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR546686A (fr) * 1921-12-21 1922-11-21 Filtre-air
US2201315A (en) * 1936-11-13 1940-05-21 American Optical Corp Respirator
US3014479A (en) * 1959-05-20 1961-12-26 Welsh Mfg Co Respirator
GB974960A (en) * 1961-12-19 1964-11-11 Ostravskokarvinsky Revir Valveless dustproof respirator
DE3032437C2 (de) * 1980-08-28 1982-08-05 Drägerwerk AG, 2400 Lübeck Halbmaskenförmig ausgebildetes Staubfilter

Also Published As

Publication number Publication date
DE3711505C2 (enrdf_load_stackoverflow) 1989-10-19
DE3711505A1 (de) 1988-10-20
EP0286016A1 (de) 1988-10-12
DE3861780D1 (de) 1991-03-28
ZA88616B (en) 1988-08-02
ES2021779B3 (es) 1991-11-16

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