EP0108560A1 - Luftversorgungseinheit mit Motorantrieb für Atemgeräte - Google Patents

Luftversorgungseinheit mit Motorantrieb für Atemgeräte Download PDF

Info

Publication number
EP0108560A1
EP0108560A1 EP83306532A EP83306532A EP0108560A1 EP 0108560 A1 EP0108560 A1 EP 0108560A1 EP 83306532 A EP83306532 A EP 83306532A EP 83306532 A EP83306532 A EP 83306532A EP 0108560 A1 EP0108560 A1 EP 0108560A1
Authority
EP
European Patent Office
Prior art keywords
housing
unit
opening
air
pump
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Withdrawn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
EP83306532A
Other languages
English (en)
French (fr)
Inventor
Raymond Odell
Richard Keven O'connor
David Buckley Easton
Stephen James Davies
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.)
Racal Safety Ltd
Original Assignee
Racal Safety 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 Racal Safety Ltd filed Critical Racal Safety Ltd
Publication of EP0108560A1 publication Critical patent/EP0108560A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus

Definitions

  • the present invention relates to improvements in and relating to respirators for providing the wearer with filtered air and for use in dusty or otherwise contaminated atmospheres.
  • Respirators of this type are well known and generally fall into two categories, being unpowered respirators with which the wearer, in inhaling, draws air through a filter, and power assisted respirators which include a pump which draws air through the filter and supplies it to the wearer.
  • Powered respirators have the advantage of requiring less or no effort on the part of the wearer which is a substantial advantage where the wearer is otherwise exerting himself.
  • respir- atators are more expensive than unpowered respirators and additionally, because different industries and jobs have different requirements for the facepiece or headpiece of the respirator which extends over the nose and mouth of the wearer, the cost of powered respirators can be substantial if a different respirator has to be designed for each such set of circumstances.
  • a powered air supply unit for a respirator for connection by a flexible hose to a facepiece or headpiece of a respirator for supplying air thereto, the unit comprising a housing defining a generally planar air inlet opening having a stepped periphery and an air outlet for connection to the flexible hose, filter means located in the stepped periphery of the opening, a removable protective cover over the opening permitting air to flow into the housing through the opening and for retaining the filter means in place in the opening, and pump means and a motor therefor mounted within the housing, the pump means having an inlet opening within the housing and an outlet connected to the housing outlet.
  • the pump means advantageously comprises a centrifugal pump and the motor is connected directly to the shaft of the pump, the motor advantageously being a d.c. motor to be powered by batteries which are also provided within the casing.
  • the casing is generally rectangular in plan with four side walls, the inlet opening being provided in one end and the protective cover being generally planar with apertures therein for permitting air to flow into the inlet opening and through the filter means to the inlet of the pump means.
  • the pump means and batteries are advantageously arranged side by side within the side walls of the casing with the outlet in the casing opening through one of the side walls and the axis of the shaft of the pump extending generally perpendicular to the cover.
  • the end wall of the casing may be partially domed to accommodate the motor which is mounted on one end of the pump opposite the end at which the pump inlet opens.
  • the unit may be designed to be supported on the body of the wearer by a harness or belt with the cover against the body of the wearer.
  • the filter means may be selected to remove particulate material and/or gases or vapours from the incoming air and are provided as replaceable units, the cover being detachably mounted on the casing to permit access to the filter means for this purpose.
  • the periphery of the inlet opening in the casing may have a plurality of steps to accommodate a plurality of different filter units for different purposes, such for example as a first filter unit for removing particulate material and a second filter unit comprising for example cintered or granular carbon, for removing gases or vapours.
  • the above described air supply unit is useable with a variety of different face- or headpieces which merely require an attachment for connecting the flexible hose thereto at an appropriate point for supplying filtered air to the mouth and nose of the wearer.
  • the above described air supply unit may be associated with a headpiece comprising a head harness for mounting on the wearer's head and including a head band for encircling the wearer's head, a visor mounted on the head band to extend over the face of the wearer, and a flexible cover peripherally attached to the head band to create a space between it and the wearer's head, the cover including an inlet for connection by a flexible hose to the air supply unit for providing air thereto which, in use, will flow from the inlet into the space within the cover and then into the space between the visor and the wearer's face.
  • the inlet is provided in the cover so as to be at the rear of the wearer's head.
  • the head band may be arranged so that the air flowing from the space within the cover into the space between the visor and the wearer's head flows between the head band and the wearer's head.
  • the headpiece may comprise a protective helmet for mounting on the head of the wearer, a visor mounted on the helmet to extend in use over the face of the wearer, and flexible ducting encircling part of the periphery of the helmet, the ducting having an inlet for connection to a flexible hose for the supply of air thereto and an outlet opening into the space between the visor and the wearer's face.
  • the inlet is provided intermediate the ends of the ducting adjacent the rear of the head and the ducting extends around the rear and sides of the helmet periphery and has two outlets both opening into the space between the visor and the wearer's face to either side of the wearer's face.
  • the visor may be rigidly or pivotally attached to the head band or helmet respectively and a shroud or other sealing means may be provided around the periphery of the visor, if required, to prevent the ambient atmosphere entering around the visor.
  • the visor or surrounding shroud may be provided with an exhale valve or perforations permitting air to flow out.
  • the air supply unit may be connected to a conventional headpiece comprising a protective helmet provided with a rearward inlet for air and internal ducts through which the air flows from the inlet to the wearer's face or which is arranged for air to flow to the wearer's face through a space within the helmet and defined between the helmet and the head of the wearer.
  • a protective helmet provided with a rearward inlet for air and internal ducts through which the air flows from the inlet to the wearer's face or which is arranged for air to flow to the wearer's face through a space within the helmet and defined between the helmet and the head of the wearer.
  • the powered air supply unit shown in Figures 1 to 5 comprises a housing 1, for example moulded of plastics material, which is generally rectangular in plan and comprises side walls 2 which are closed at one end by an end wall 5 and at the other end define an inlet opening 3 which is generally planar and is provided with a protective cover 4.
  • the end wall 5 of the housing is partially domed for reasons which will appear.
  • the housing 1 has an outlet 6 in one side wall 2 which is adapted, for example as shown is provided with a helical thread 7, for engagement with a flexible hose 8 (shown in Figure 6).
  • the cover 4 is generally planar and has an inturned flange 4a which is provided with lateral inlet apertures 4b permitting air to flow into the housing and through opening 3.
  • the cover 4 is releasably engageable with the rest of the housing. As shown, the cover 4 is received within a peripheral wall 9 surrounding the opening 3 and is provided with lugs 10 which are resiliently engageable in apertures 11 provided in flanges 12 which project from wall 9 on opposite sides of the opening 3 and are resiliently flexible to enable the lugs 10 to engage in the apertures 11.
  • the pump 13 is a centrifugal pump and comprises impeller blades 16 which are cantilevered from a base plate 17 which extends generally parallel to the plane of opening 3 and cover 4.
  • the pump 13 is provided with a driving shaft 18 formed integrally with the base plate 17 and which is connected directly to the driving shaft of the motor 14, motor 14 being accommodated in the domed portion of end wall 5 and arranged at that end of the pump 13 opposite the end provided with the axial inlet 21 of the pump. Inlet 21 opens into the housing and faces cover 4.
  • the pump 16 also has an outlet 20 which is connected directly to the outlet 6 of the housing.
  • the pump 13 and motor 14 are thus arranged within the housing with their axes generally perpendicular to the plane of opening 3 and cover 4.
  • the battery housing 15 is arranged beside the pump and motor and, as shown in Figure 5, the batteries 19 are connected in series with the motor 14 and a switch 15.
  • the switch 15 is mounted adjacent the pump 13 and projects through a side wall of the housing so as to be accessible from the outside.
  • filter means for filtering the air as it flows into the housing through the opening 3 and before it reaches the pump inlet 21.
  • the filter means is accommodated in the opening 3 and to this end the ends of the side walls 2 defining the opening 3 are stepped, as at 22 and 23.
  • the filter means is designed to be located in one or both of these steps and held in place by the cover 4.
  • a single filter unit 25 is provided comprising layers of filter material for removing particles and which is located in step 22.
  • this filter unit 25 is supported by a mesh sheet 26, for example made of plastics material, which is seated in opening 3 adjacent step 22.
  • a second filter unit 27 is provided, for example comprising cintered or granular carbon for removing gases or vapours, and is located in step 23. This unit 27 is held in place by the mesh sheet 26 and filter unit 25, which is in turn held in place by the cover 4.
  • a single filter unit may be provided, seated on step 23 and occupying the entire space between step 23 and the main wall of the cover, the unit being held in place under a slight compressive force by the cover and sealed at its periphery by a compressible seal provided on step 23.
  • the pump when the switch 15 is operated, the pump is driven to draw air through the inlet apertures 4b, opening 3, the filter means, e.g. units 25,27, provided across the opening 3, and pump inlet 21, and to drive it out through pump outlet 20 and housing outlet 6 into the flexible hose 8 attached thereto.
  • the cover 4 When it is required to replace the filter material, all that is needed is that the cover 4 be removed. This provides immediate access to all the filter material within the housing, which can then simply be removed and replaced.
  • the cover 4 is removed together with the filter means and a member 28 which releasably holds the batteries in place.
  • the unit is designed to be supported on the body of the wearer by a harness or belt which is attached to the casing by apertures 29 provided in flanges 12, and the unit is designed to be worn with the generally planar cover 4 against the body of the wearer.
  • the above described unit can be used with any suitable headpiece or facepiece which has an inlet suitable for connection to any flexible hose.
  • the headpiece shown in Figure 6 comprises a rigid helmet 50 to be mounted on the head of the wearer and is adapted to be supported on the head by a harness 50a.
  • a visor 51 is pivotally mounted on the front of the helmet and provided with a flexible shroud 52 around the periphery of the visor and adjacent parts of the helmet, which has an elasticated free edge 53 so as to positively engage around the wearer's face to seal the headpiece around the visor.
  • the helmet is provided at its periphery with flexible ducting or a hose 55 which extends around the back and sides of the periphery of the helmet.
  • the ducting is provided with a T-piece provided with an inlet 54 adapted for connection to the flexible hose 8.
  • the free ends of the hose 55 form outlets which open into the space between the visor and the wearer's face on either side of the wearer's face. Air from the inlet 54 thus flows through the hose 55 to the space within the visor.
  • the shroud 52 may be provided with a one-way exhale valve or, as shown, a zone of perforations 56 for exit of air therefrom.
  • the headpiece shown in Figure 7 comprises a harness 60 comprising for example a head band 60a encircling the wearer's head and one or more straps 60b which extend over the wearer's head.
  • a visor 61 is pivotally mounted on the head band 60a.
  • a flexible cover 62 of flexible impervious material extends over the harness to cover the head of the wearer and is peripherally attached to the head band 60a to provide with the wearer's head a space.
  • the cover is provided with an inlet 63 at the rear of the wearer's head for connection to the flexible hose 8 so that air flows from the inlet 63 into the space within the cover and there inflates the cover, and from the space within the cover to the space within the visor.
  • Air flow passages may be provided to communicate air from the space within the cover to the space within the visor or air may simply flow between the head band and the wearer's head.
  • the visor may be provided with a shroud 64 with an elasticated free edge and means, such as perforations 65, permitting exit of air from the space within the visor.
  • the headpiece of Figure 8 is similar in construction to that of Figure 7 and the same reference numerals, but with the prefix 7 rather than 6, have been used for like parts.
  • the visor 71 is fixedly mounted on the head band 70a of the harness 70.
  • the air supply unit of Figures 1 to 5 may be associated with a variety of other forms and constructions of headpieces or may be associated with facepieces which essentially only cover a part or the whole of the face of the wearer and are suitably fixed to the head of the wearer. Additionally, while as described above, the air supply unit is solely battery operated, the electrical circuit thereof may be adapted to permit battery charging from an external power supply and/or the motor to be energised by an external power supply, the batteries then serving as a stand-by power supply for use when the unit is disconnected from the external power supply.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Massaging Devices (AREA)
EP83306532A 1982-11-01 1983-10-27 Luftversorgungseinheit mit Motorantrieb für Atemgeräte Withdrawn EP0108560A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8231135 1982-11-01
GB8231135 1982-11-01

Publications (1)

Publication Number Publication Date
EP0108560A1 true EP0108560A1 (de) 1984-05-16

Family

ID=10533963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83306532A Withdrawn EP0108560A1 (de) 1982-11-01 1983-10-27 Luftversorgungseinheit mit Motorantrieb für Atemgeräte

Country Status (7)

Country Link
EP (1) EP0108560A1 (de)
JP (1) JPS5995067A (de)
AU (1) AU2084883A (de)
DK (1) DK497683A (de)
FI (1) FI833992A (de)
GB (1) GB2128897A (de)
NO (1) NO833934L (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0164946A2 (de) * 1984-06-06 1985-12-18 Racal Safety Limited Athemschutzmasken
US6575165B1 (en) 2000-08-03 2003-06-10 3M Innovative Properties Company Apparatus and method for breathing apparatus component coupling
KR200471463Y1 (ko) * 2012-05-08 2014-02-24 김현일 공기 정화 호흡 장치
WO2019183200A1 (en) * 2018-03-23 2019-09-26 Poma 22 Llc Hard hat filtered, battery-operated air flow system and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO921853D0 (no) * 1992-05-11 1992-05-11 Iver Hansen Luftrenser
US5579761A (en) * 1995-01-20 1996-12-03 Minnesota Mining And Manufacturing Company Respirator having snap-fit filter cartridge

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD749A (de) *
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
FR818839A (fr) * 1936-06-11 1937-10-04 Perfectionnements aux appareils respiratoires
FR1320829A (fr) * 1962-01-30 1963-03-15 Houilleres Bassin Du Nord Aérateur autonome pour la respiration en atmosphère polluée
DE1979478U (de) * 1967-12-13 1968-02-22 Franz Goesmann Zum anbau an landwirtschaftlichen maschinen, insbesondere maehdreschern, geeignetes luftreinigungsgeraet.
US3413972A (en) * 1965-09-27 1968-12-03 Carl L. Depping Airflow helmet
GB1212821A (en) * 1966-10-21 1970-11-18 Simms Group Res Dev Ltd Improvements in or relating to respirator devices
US3657740A (en) * 1969-11-26 1972-04-18 Armando A Cialone Ventilated welder{3 s mask assembly
US3736927A (en) * 1971-05-17 1973-06-05 F Misaqi Self-contained air purifier and conditioner unit
GB2032284A (en) * 1978-10-02 1980-05-08 Racal Safety Ltd Improvements in and relating to breathing apparatus
US4233972A (en) * 1978-05-08 1980-11-18 Wolfgang Hauff Portable air filtering and breathing assist device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT115845B (de) * 1928-01-30 1930-01-10 Otto Heinrich Dr Draeger Filter, insbesondere Atmungsfilter für Rauch und Nebel, sowie Verfahren zu seiner Herstellung.
GB761263A (en) * 1954-02-22 1956-11-14 Martindale Electric Company Lt Improvements in respiratory masks
CA1119975A (en) * 1977-05-31 1982-03-16 John W. Tidland Portable air filtering and breathing assist device masks
GB2029258A (en) * 1978-08-30 1980-03-19 Russel Finex Improvements in or relating to bulk material vacuum conveying apparatus

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD749A (de) *
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
FR818839A (fr) * 1936-06-11 1937-10-04 Perfectionnements aux appareils respiratoires
FR1320829A (fr) * 1962-01-30 1963-03-15 Houilleres Bassin Du Nord Aérateur autonome pour la respiration en atmosphère polluée
US3413972A (en) * 1965-09-27 1968-12-03 Carl L. Depping Airflow helmet
GB1212821A (en) * 1966-10-21 1970-11-18 Simms Group Res Dev Ltd Improvements in or relating to respirator devices
DE1979478U (de) * 1967-12-13 1968-02-22 Franz Goesmann Zum anbau an landwirtschaftlichen maschinen, insbesondere maehdreschern, geeignetes luftreinigungsgeraet.
US3657740A (en) * 1969-11-26 1972-04-18 Armando A Cialone Ventilated welder{3 s mask assembly
US3736927A (en) * 1971-05-17 1973-06-05 F Misaqi Self-contained air purifier and conditioner unit
US4233972A (en) * 1978-05-08 1980-11-18 Wolfgang Hauff Portable air filtering and breathing assist device
GB2032284A (en) * 1978-10-02 1980-05-08 Racal Safety Ltd Improvements in and relating to breathing apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0164946A2 (de) * 1984-06-06 1985-12-18 Racal Safety Limited Athemschutzmasken
EP0164946A3 (de) * 1984-06-06 1986-06-25 Racal Safety Limited Athemschutzmasken
US6575165B1 (en) 2000-08-03 2003-06-10 3M Innovative Properties Company Apparatus and method for breathing apparatus component coupling
KR200471463Y1 (ko) * 2012-05-08 2014-02-24 김현일 공기 정화 호흡 장치
WO2019183200A1 (en) * 2018-03-23 2019-09-26 Poma 22 Llc Hard hat filtered, battery-operated air flow system and method

Also Published As

Publication number Publication date
DK497683A (da) 1984-05-02
FI833992A0 (fi) 1983-10-31
GB8328709D0 (en) 1983-11-30
DK497683D0 (da) 1983-10-31
FI833992A (fi) 1984-05-02
AU2084883A (en) 1984-05-10
NO833934L (no) 1984-05-02
GB2128897A (en) 1984-05-10
JPS5995067A (ja) 1984-05-31

Similar Documents

Publication Publication Date Title
USRE46888E1 (en) Integrated belt and plenum powered air purifying respirator
US4590951A (en) Breathing apparatus
EP0164946A2 (de) Athemschutzmasken
CA2706376C (en) Modular powered air purifying respirator
RU2372120C2 (ru) Портативная воздухоочистительная система, использующая фильтры, закрытые кожухом
US7748381B2 (en) Portable blower system
US6854464B2 (en) Respiration protecting apparatus
EP1494759B1 (de) Persönliches eindämmungssystem mit abgedichteter durchfuhr
US20050103335A1 (en) Modular respirators and a method of conversion thereof
US20130014751A1 (en) Helmet-mounted respirator apparatus with a dual plenum system
EP0047296A4 (de) Atmungsgerät mit druckluft.
US5065745A (en) Portable respiratory protection device
EP0094757B1 (de) Atemschutzgerät
EP0108560A1 (de) Luftversorgungseinheit mit Motorantrieb für Atemgeräte
GB2173705A (en) Dust filter respirator
JPS612878A (ja) ポンプ装置を備えたガスマスク
CN213208106U (zh) 一种背负式新风装置
GB2600741A (en) Air-purifying respirator cartridge

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR IT NL SE

17P Request for examination filed

Effective date: 19841030

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860109

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DAVIES, STEPHEN JAMES

Inventor name: EASTON, DAVID BUCKLEY

Inventor name: O'CONNOR, RICHARD KEVEN

Inventor name: ODELL, RAYMOND