EP0024133B1 - Luftversorgungseinheiten - Google Patents

Luftversorgungseinheiten Download PDF

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Publication number
EP0024133B1
EP0024133B1 EP80302546A EP80302546A EP0024133B1 EP 0024133 B1 EP0024133 B1 EP 0024133B1 EP 80302546 A EP80302546 A EP 80302546A EP 80302546 A EP80302546 A EP 80302546A EP 0024133 B1 EP0024133 B1 EP 0024133B1
Authority
EP
European Patent Office
Prior art keywords
casing
fan
battery
motor
unit
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
Application number
EP80302546A
Other languages
English (en)
French (fr)
Other versions
EP0024133A1 (de
Inventor
Leslie Flint
Malcolm Philip Brown
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.)
MARWIN FOUNDRY UNITS Ltd
Original Assignee
MARWIN FOUNDRY UNITS Ltd
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 MARWIN FOUNDRY UNITS Ltd filed Critical MARWIN FOUNDRY UNITS Ltd
Publication of EP0024133A1 publication Critical patent/EP0024133A1/de
Application granted granted Critical
Publication of EP0024133B1 publication Critical patent/EP0024133B1/de
Expired 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
    • 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
    • A62B18/006—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 with pumps for forced ventilation
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B15/00—Installations affording protection against poisonous or injurious substances, e.g. with separate breathing apparatus

Definitions

  • the invention relates to an air supply unit suitable for blowing air to a face mask for the respiratory protection of a person working in a noxious or unpleasant industrial atmosphere.
  • air supply unit suitable for blowing air to a face mask for the respiratory protection of a person working in a noxious or unpleasant industrial atmosphere.
  • environments in which such a unit is useful include work-places where there is dust or fumes.
  • Patent Specifications DE 2823446 A1 (corresponding to UK 1588993) which shows a housing 30 containing a blower 32, filter discs 42 held in position by caps 38, and a battery pack 34.
  • the blower 32 draws air in through the filters 42, and over the battery 34, and blows it through a conduit 28 to a face piece.
  • US 3496703 shows electrical components secured to an upper shelf 23.
  • the unit comprises a casing, a central plate to which motor, battery and other electrical components are secured forming an integral part of the casing, a removable back plate and the cap having a central part removable leaving a rim for securing a supplementary filter unit.
  • centrifugal fan has been found necessary to produce sufficient pressure at reasonable power consumption and with a reasonable filter area.
  • the filter unit upstream of the fan reduces any tendency for the unit to become clogged with dust or other foreign matter.
  • the filter unit may comprise a pre-filter or glass fibre mat, followed by a folded-paper unit to remove dust or an activated carbon unit to absorb organic vapours.
  • the casing containing all the operative components makes the unit easy to handle and maintain.
  • the casing is a plastics moulding and includes a back plate removable to provide access to the motor, battery, and other electrical components such as switches.
  • the casing also includes a centre plate to which the motor, fan, battery and other electrical components are releasably secured, for example by screws, so that each can readily be removed for replacement or maintenance.
  • the casing may be provided with loops for a belt for the user, but may be free-standing for example for use on a work bench or in a tractor cab.
  • the filter unit is preferably across the front of the casing, and the filter itself held in position by an apertured cap, and secured to the casing by screw-threads.
  • a central part of the apertured cap is removable, leaving a rim for securing a supplementary filter unit projecting out of the casing through the cap.
  • the fan draws in-coming air through the apertured cap and filter, and impels filtered air to the downstream duct.
  • the battery is preferably below the motor and duct so as fully to utilize the space available.
  • the battery may be rechargeable through a connection on the side of the casing, and preferably comprises sealed lead/acid or nickel cadmium cells.
  • the motor is preferably of low inductance which is intrinsically safe in an explosive atmosphere. The unit can be made so light that its weight on the belt is not noticable.
  • a main casing 34 ( Figure 2) contains a centrifugal fan 10, a filter unit 12 upstream, and a duct 14 downstream for guiding blown air to a tube (not shown) incorporating a non-return valve for transmission to a face mask (not shown).
  • the unit is self-contained with an electric motor 18 for driving the fan 10, a rechargeable battery 20 mounted on a central plate 36 ( Figure 2), and belt loops 22 on the outside.
  • a circumferential rim 42 can be left for securing a second filter unit 44 in front of the unit 12 as in Figure 3.
  • a back plate 32 is screwed onto the main casing 34, and can be removed to expose the motor 18 backing onto the fan 10, the battery 20, and a centre plate 36, an on-off switch or control knob 46, and a battery re-charge socket 48.
  • a safety fuse 50 is provided in the electrical circuit adjacent the motor 18.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Toxicology (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Claims (1)

1. Luftversorgungsgerät bestehend aus einem Gehäuse (34), einem Zentrifugalgebläse (10), einer dem Gebläse (10) vorgeschalteten Filtereinheit (12), die von einer mit Öffnung versehenen Kappe (24) in Lage gehalten wird, wobei, die Kappe mittels Schraubgewinde (26) am Gehäuse befestigt wird, einen dem Gebläse (10) nachgeschalteten Luftkanal (14), durch den Blasluft einem Schlauch zur Weiterleitung an eine Gesichtsmaske zugeführt wird; einem Electromotor (18) zum Antrieb des Gebläses (10), einer Batterie (20) als Stromquelle für den Motor (18), wobei de Motor (18), das Gebläse (10), die Batterie (20) und andere elektrische Bauteile an einer zentralen Platte (36) befestigt sind, und wobei da Gehäuse eine abnehmbare Rückplatte (32) aufweist, um Zungang zum Motor (18) zur Batterie (20) und anderen elektrischen Bauteilen zu ermöglichen, dadurch gekennzeichnet dass die zentrale Platte (36) ein Teil des Gehäuses (34) bildet und dass die Kappe (24) ein mittig angeordnetes Teil (40) aufweist, das sich entfernen und dadurch einen Rand zur Befestigung einer zusätzlichen Filtereinheit (44) stehen lässt.
EP80302546A 1979-07-28 1980-07-25 Luftversorgungseinheiten Expired EP0024133B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7926399 1979-07-28
GB7926399 1979-07-28

Publications (2)

Publication Number Publication Date
EP0024133A1 EP0024133A1 (de) 1981-02-25
EP0024133B1 true EP0024133B1 (de) 1984-06-13

Family

ID=10506849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80302546A Expired EP0024133B1 (de) 1979-07-28 1980-07-25 Luftversorgungseinheiten

Country Status (3)

Country Link
EP (1) EP0024133B1 (de)
JP (1) JPS5620470A (de)
DE (1) DE3068194D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4023013A1 (de) * 1989-07-19 1991-01-31 Sabre Safety Ltd Atemschutzgeraet
CN106075761A (zh) * 2016-08-15 2016-11-09 钟能珍 一种送风式空气过滤器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100105607A (ko) * 2007-11-20 2010-09-29 애번 프로텍션 시스템 인코포레이티드 모듈식 전동 공기 정화 호흡보호구

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496703A (en) * 1967-10-09 1970-02-24 Rite Hardware Mfg Co Backpack air-conditioning apparatus
US3882698A (en) * 1973-06-27 1975-05-13 American & Efird Thread Mills Flexible dye tube

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR782137A (fr) * 1934-02-24 1935-05-28 Wonder Perfectionnements aux masques à gaz
FR785223A (fr) * 1934-09-21 1935-08-05 Cela Holding S A Appareil portatif de protection contre les gaz
US2688962A (en) * 1953-04-28 1954-09-14 Charles H Foley Apparatus for protecting workmen from dust
BE555402A (de) * 1957-02-28 1957-03-15
US3078845A (en) * 1961-03-24 1963-02-26 Wilbur F Kohlmeyer Portable dust eliminator
US3413972A (en) * 1965-09-27 1968-12-03 Carl L. Depping Airflow helmet
DE1979478U (de) * 1967-12-13 1968-02-22 Franz Goesmann Zum anbau an landwirtschaftlichen maschinen, insbesondere maehdreschern, geeignetes luftreinigungsgeraet.
US3584314A (en) * 1968-03-18 1971-06-15 Seymour Mfg Co Ventilated welding helmet
US3657740A (en) * 1969-11-26 1972-04-18 Armando A Cialone Ventilated welder{3 s mask assembly
US3649964A (en) * 1970-06-04 1972-03-21 Willy A E Schoelz Ventilated welders face mask
US3736927A (en) * 1971-05-17 1973-06-05 F Misaqi Self-contained air purifier and conditioner unit
US3822698A (en) * 1973-01-22 1974-07-09 R Guy Powered air-purifying respirator helmet
DE2612877C2 (de) * 1976-03-26 1985-06-20 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Atemluftversorgungsgerät
CA1119975A (en) * 1977-05-31 1982-03-16 John W. Tidland Portable air filtering and breathing assist device masks

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496703A (en) * 1967-10-09 1970-02-24 Rite Hardware Mfg Co Backpack air-conditioning apparatus
US3882698A (en) * 1973-06-27 1975-05-13 American & Efird Thread Mills Flexible dye tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4023013A1 (de) * 1989-07-19 1991-01-31 Sabre Safety Ltd Atemschutzgeraet
CN106075761A (zh) * 2016-08-15 2016-11-09 钟能珍 一种送风式空气过滤器

Also Published As

Publication number Publication date
EP0024133A1 (de) 1981-02-25
DE3068194D1 (en) 1984-07-19
JPS5620470A (en) 1981-02-26

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