EP1252914A1 - Unité de pompage d'air purifié pour dispositifs de protection à ventilation assistée - Google Patents

Unité de pompage d'air purifié pour dispositifs de protection à ventilation assistée Download PDF

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Publication number
EP1252914A1
EP1252914A1 EP02076609A EP02076609A EP1252914A1 EP 1252914 A1 EP1252914 A1 EP 1252914A1 EP 02076609 A EP02076609 A EP 02076609A EP 02076609 A EP02076609 A EP 02076609A EP 1252914 A1 EP1252914 A1 EP 1252914A1
Authority
EP
European Patent Office
Prior art keywords
pumping unit
shell
purified air
unit
air
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Withdrawn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
EP02076609A
Other languages
German (de)
English (en)
Inventor
Alberto Iotti
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.)
Kasco Srl
Original Assignee
Kasco Srl
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
Priority claimed from IT2001RE000043A external-priority patent/ITRE20010043A1/it
Priority claimed from IT2001RE000092A external-priority patent/ITRE20010092A1/it
Application filed by Kasco Srl filed Critical Kasco Srl
Publication of EP1252914A1 publication Critical patent/EP1252914A1/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Withdrawn legal-status Critical Current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
    • 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
    • A62B18/04—Gas helmets
    • A62B18/045—Gas helmets with fans for delivering air for breathing mounted in or on the helmet
    • 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

Definitions

  • This invention relates in a totally general manner to operations requiring human intervention in the presence of dangerous contaminants such as aerosols, fumes, gases, mists and dusts, for example during reclamation work involving the dismantling and salvaging of roofing and constructions comprising asbestos cement elements, the noxiousness of which is well known.
  • the invention relates to a respiration device to be used in such situations.
  • protection devices worn by the operator are known, they being fed with purified air.
  • Said devices can be flexible helmets usually known as hoods, rigid helmets or masks, with suitable feed means feeding the purified air after filtration.
  • the known helmets basically comprise a head covering shell; a collar of flexible material impermeable to dangerous contaminants which is sealed to the lower mouth of the shell; and a small motorized fan, usually carried by the user by means of a belt, its casing being connected on its entry side to the outside air via at least one port intercepted by a filter unit, and on its exit side to said shell via at least one hose.
  • the fan motor is energized by a storage or other battery carried by said belt; the fan maintains the shell under slight positive pressure to prevent contaminated air from entering it, the excess air discharging from the base of the collar, and also possibly via at least one bleed valve provided either on the shell or on the collar, or via a sized hole provided in the visor.
  • helmets known as integral or compact, are also known in which the motorized fan and the respective powering battery are housed in a suitable compartment in the head-covering shell.
  • a problem arising with such helmets is the fact that the system for supplying filtered air to the shell can undergo damage or malfunction, so that the positive purified air pressure ceases within the shell, and the helmet no longer performs its proper protective function.
  • a second known type of protection device is represented by masks, which can be divided into:
  • the known masks comprise essentially an at least partly transparent face-covering shell, an adjustable system for fixing said shell to the operator's head, and a pressurized purified air feed conduit which usually opens at the base of said shell.
  • said conduit comprises a hose which at one end is intended to be connected to a pressurized air source, such as a compressor unit, and in an intermediate position is intercepted by an air pressure and flow regulator apparatus, said apparatus being usually carried by the operator, while at its opposite end it is connected to the face-covering shell.
  • a pressurized air source such as a compressor unit
  • the said shell is also provided with an inhalation port which opens directly to the outside by way of a filter.
  • the delivery end of said hose is normally connected to said port at a point located downstream of said filter.
  • the pressurized purified air is provided by a small motorized fan, usually carried by the operator by means of a belt and having its casing connected on its entry side to the outside air via at least one port intercepted by a filter unit, and on its exit side to said shell via at least one hose.
  • the masks with a movable supply system present the advantage of not hindering the operator's movements, however they are not free of the risk of creating gaps between the face-covering shell and the operator's face through which contaminated air can pass from the outside to the inside when the absolute value of the depression due to the inhalation of the operator exceeds that of the positive pressure of the air forced by the fan.
  • the main object of the present invention is to overcome the drawbacks of the known art within the context of a simple, rational, reliable, durable, safe and economical construction.
  • a pumping unit to be associated with a protection device, worn by the operator, there being connected to said protection device the delivery side of an air supply system which on its suction side communicates with the outside via at least one port intercepted by a filter unit.
  • a manually operated pumping unit is associated with the protection device to provide purified air if for any reason this cannot be fed to the protection device by the said supply system.
  • said pumping unit is directly connected to the protection device via a suitable purified air feed port.
  • the pumping unit is positioned to intercept the circulation circuit of the circulation circuit associated with the air supply system.
  • the pumping unit of the invention in fact constitutes an independent ventilation system in the sense that it does not depend on the operation of the air supply system, the user has only to take care to operate said pumping unit.
  • said pumping unit which will be described in detail hereinafter, can also be easily applied to existing helmets or masks, as will be apparent hereinafter.
  • Figure 1 is an exploded perspective view showing the invention applied to a first protection device.
  • Figure 2 is a partial view in the direction II of Figure 1.
  • Figure 3 is an enlarged part of the section III-III of Figure 1, the unidirectional automatic non-return valves being shown open.
  • Figure 4 is a view entirely similar to that of Figure 3, but with the valves closed.
  • Figures 5 and 6 show the invention applied to a different type of protection device.
  • FIGS. 1 and in particular Figure 1 show a ventilated helmet, indicated overall by the reference numeral 1, and a purified air supply system indicated overall by 2.
  • the helmet comprises a shell 10 with sealed visor 11, automatic lateral bleed valves 12, and a collar 13 of flexible material impermeable to contaminants such as those stated in the introduction.
  • the illustrated collar 13 of known type, is removably fixed to the lower mouth of the shell 10, and is provided with a cord 14 for its tightening against the operator's neck.
  • the supply system 2 also of known type, comprises a belt 20 intended to be worn by the user and provided with a battery holder 21 and a ventilation unit 22 composed of a motor and fan, which is connected to said battery by the cable indicated by 23.
  • the fan casing presents two suction ports 220 with which respective filter cartridges 221 are associated, and a delivery port 222 with which a hose 121 is associated, to be connected to the entry port 122 of the shell 10.
  • the ventilation unit 22 can have a single suction port 220, or more than two.
  • a manually operated pumping unit 3 to be used in case of emergency, for example if the ventilation unit 22 malfunctions, to enable the user to withdraw from the site of operation without breathing contaminated air.
  • the said pumping unit 3 comprises at least one bellows-shaped tubular element 4 which is open at one end and at its other end presents a rigid perforated diaphragm 5.
  • the tubular element 4 consists of a rather strong elastically deformable synthetic material, preferably reinforced with fibres.
  • the diaphragm 5 presents a series of circular apertures 7, four in number in the illustrated example, each of these being provided with a spoked dial 70 with a holed hub.
  • the illustrated valve 8 consists of a relatively thin discoidal element of elastically deformable material, said discoidal element having a diameter greater than that of the aperture 7, and presenting a slightly concave shape with its concavity facing said aperture, and with its peripheral edge in contact with the diaphragm 5 when the valve is at rest (see Figure 4).
  • diametrical gripping strap 700 acting as a member for operating the respective bellows 4.
  • valves 8 remain closed when the helmet is not in use and the bellows 4 are compressed, the valves 8 opening when the ventilation unit 22 is in operation and the bellows are extended.
  • FIGS. 5 and 6 show the pumping or ventilation unit applied to a mask. Said figures show a ventilated mask, indicated overall by the reference numeral 101, with which there is associated a purified air supply system indicated overall by 103 in Figure 5 and 102 in Figure 6.
  • the mask 101 is of known type and comprises a transparent rigid shell 103 intended to cover the operator's face, and presenting a rear perimetral seal gasket 104; an adjustable sling 105 with chin-strap 106 for fixing the shell 103 to the operator's head; two automatic lateral bleed valves 107, of which only one is visible in the figures; and a purified air entry port 108.
  • the supply system 103 (see Figure 5) is substantially similar to the supply system 2 already described. It essentially comprises a belt 20 intended to be worn by the operator and provided with a battery holder 21 and a ventilation unit 22 composed of a motor and fan, which is connected to said battery by the cable indicated by 23.
  • the fan casing presents two suction ports 220 with which respective filter cartridges 221 are associated, and a delivery port 222 with which a hose 121 is associated, to be connected to the entry port 108 of the shell 103.
  • the ventilation unit 22 can have a single suction port 220, or more than two.
  • the supply system 102 (see Figure 6) comprises a belt 20 intended to be worn by the operator, and provided with a plate 44 carrying a regulator apparatus 444 from which an arrival hose 333 and departure hose 33 for the pressurized purified air extend.
  • Said apparatus 444 comprises an air pressure and flow regulator device 55 upstream, and a safety device 66 downstream.
  • Said safety device 66 is normally inactive, and is activated automatically if the regulator device 55 malfunctions, to perform the same function.
  • the regulator device 55 is provided with an entry connection stub 88 to which, by means of a quick connector 134, one end of the arrival hose 333 is connected, the other end 135 of which is intended to be connected to a usual compressor unit (not shown for simplicity) or equivalent.
  • the departure hose 33 is connected to the exit connection stub 99 of the safety device 66, and at its other end is connected to a lateral port 133 of a manifold 320.
  • This latter has an externally threaded end portion arranged to screw into the port 108 in the shell 103, its opposite end having an internally threaded portion to match the threaded stem of a filter cartridge 321.
  • the hose 33 can obviously open directly into the shell 103.
  • a manually operated pumping unit 3 to be used in case of necessity, for example when between the gasket 104 of the shell 103 and the operator's face inconvenient gaps occur through which contaminated air can enter, as explained in the introduction.
  • Said pumping unit 3 is obviously also useful in the case of malfunction of the ventilation unit 22, as it enables the operator to withdraw from the working site without breathing contaminated air.
  • valves 8 remain closed when the mask 101 is not in use, with the bellows 4 compressed, the said valves 8 opening when the ventilation unit 22 is in operation and the bellows 4 are extended.
  • valves 8 remain closed when the mask is not in use, with the mask 101 connected to the compressor via the hose 333 and the bellows 4 compressed, the said valves 8 opening when the hose 333 is disconnected from the compressor and the air is drawn from the outside via the cartridge 321 by the effect of the operator's inhalation, and when the bellows 4 are extended.
  • a manual piston pump can be used instead of the manual bellows pump.
  • the manual bellows or piston pump can be positioned at points different from those shown.
  • the mask 101 can be positioned directly on the shell 10 of the helmet 1 or on the shell 103 of the mask 101, for example at the centre of its upper part.
  • the pump will be provided with its own filter element.
  • said manual bellows or piston pump can be positioned either immediately downstream of the motorized fan, or immediately upstream thereof, i.e. upstream of the filter cartridge 221.
  • said manual bellows or piston pump can be positioned either downstream of the filter cartridge 321, or upstream or downstream of the regulator apparatus 444.

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)
EP02076609A 2001-04-24 2002-04-23 Unité de pompage d'air purifié pour dispositifs de protection à ventilation assistée Withdrawn EP1252914A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT2001RE000043A ITRE20010043A1 (it) 2001-04-24 2001-04-24 Casco a ventilazione assistita con aria depurata
ITRE20010043 2001-04-24
ITRE20010092 2001-09-17
IT2001RE000092A ITRE20010092A1 (it) 2001-09-17 2001-09-17 Maschera a ventilazione assistita con aria depurata

Publications (1)

Publication Number Publication Date
EP1252914A1 true EP1252914A1 (fr) 2002-10-30

Family

ID=26332830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02076609A Withdrawn EP1252914A1 (fr) 2001-04-24 2002-04-23 Unité de pompage d'air purifié pour dispositifs de protection à ventilation assistée

Country Status (1)

Country Link
EP (1) EP1252914A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655052A2 (fr) * 2004-11-05 2006-05-10 Air Products and Chemicals, Inc. Système portable de traitement fournissant une pression positive
EP2094360A1 (fr) * 2006-12-13 2009-09-02 Ludwik Fedorko Procédé et appareil d'assistance ventilatoire
JP2020518424A (ja) * 2017-05-01 2020-06-25 ベスーエル ジフロン ヤアコヴ インダストリーズ エルティーディー． 電動送風器を備えるｎｂｃ手動予備ベローズ
WO2020162692A1 (fr) * 2019-02-07 2020-08-13 김재균 Dispositif de masque d'alimentation en air associé à la respiration abdominale
IT202000014731A1 (it) * 2020-06-19 2021-12-19 LANNA Francesco CRESCENZI Dispositivo di protezione individuale mediante filtrazione dell’aria respirata.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR785223A (fr) * 1934-09-21 1935-08-05 Cela Holding S A Appareil portatif de protection contre les gaz
GB438980A (en) * 1934-07-17 1935-11-27 Alice Leigh Smith Improvements relating to respiratory appliances for protection against noxious gases
FR859308A (fr) * 1939-05-06 1940-12-16 Perfectionnements aux appareils respiratoires
US4440164A (en) * 1979-09-10 1984-04-03 Bertil Werjefelt Life support system and method of providing fresh air to enclosed areas
US4590951A (en) * 1983-06-07 1986-05-27 Racal Safety Limited Breathing apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB438980A (en) * 1934-07-17 1935-11-27 Alice Leigh Smith Improvements relating to respiratory appliances for protection against noxious gases
FR785223A (fr) * 1934-09-21 1935-08-05 Cela Holding S A Appareil portatif de protection contre les gaz
FR859308A (fr) * 1939-05-06 1940-12-16 Perfectionnements aux appareils respiratoires
US4440164A (en) * 1979-09-10 1984-04-03 Bertil Werjefelt Life support system and method of providing fresh air to enclosed areas
US4590951A (en) * 1983-06-07 1986-05-27 Racal Safety Limited Breathing apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655052A2 (fr) * 2004-11-05 2006-05-10 Air Products and Chemicals, Inc. Système portable de traitement fournissant une pression positive
EP1655052A3 (fr) * 2004-11-05 2006-07-26 Air Products and Chemicals, Inc. Système portable de traitement fournissant une pression positive
EP2094360A1 (fr) * 2006-12-13 2009-09-02 Ludwik Fedorko Procédé et appareil d'assistance ventilatoire
EP2094360A4 (fr) * 2006-12-13 2013-06-12 Ludwik Fedorko Procédé et appareil d'assistance ventilatoire
JP2020518424A (ja) * 2017-05-01 2020-06-25 ベスーエル ジフロン ヤアコヴ インダストリーズ エルティーディー． 電動送風器を備えるｎｂｃ手動予備ベローズ
JP7049443B2 (ja) 2017-05-01 2022-04-06 ベスーエル ジフロン ヤアコヴ インダストリーズ エルティーディー． 電動送風器を備えるｎｂｃ手動予備ベローズ
WO2020162692A1 (fr) * 2019-02-07 2020-08-13 김재균 Dispositif de masque d'alimentation en air associé à la respiration abdominale
IT202000014731A1 (it) * 2020-06-19 2021-12-19 LANNA Francesco CRESCENZI Dispositivo di protezione individuale mediante filtrazione dell’aria respirata.

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