US3202150A - Filter attachment for a pressurized breathing apparatus - Google Patents
Filter attachment for a pressurized breathing apparatus Download PDFInfo
- Publication number
- US3202150A US3202150A US201521A US20152162A US3202150A US 3202150 A US3202150 A US 3202150A US 201521 A US201521 A US 201521A US 20152162 A US20152162 A US 20152162A US 3202150 A US3202150 A US 3202150A
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- United States
- Prior art keywords
- mask
- filter
- regulator
- fitting
- container
- Prior art date
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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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/02—Respiratory apparatus with compressed oxygen or air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/35—Respirators and register filters
Definitions
- This invention relates to the combination of a filter and a breathing apparatus, said combination being so constituted that the person who is wearing the combination may either breathe in ambient air which was originally slightly contaminated but which has been completely purified by .a filter or, optionally, may cut 01f this flow of ambient air through the filter and breathe in only breathing fluid that is supplied by a breathing apparatus from a tank of compressed breathing fluid.
- the principal object of the invention is to enable a person, who is approaching an area which might be contaminated, to breathe in either pure air or lightly contaminated, ambient air through a purifying filter so long as the contaminants in the ambient air are not greater than the filter can adequately handle, and then, if or when the percentage of contaminants becomes excessive, to switch over from the filter to a breathing apparatus that is supplied by pure breathing air from a pressurized tank.
- FIGURE 1 is a front elevation of the upper torso of a fireman equipped with my complete invention with all of its component part connected together.
- FIGURE 2 is a similar front elevation, but showing the filter 8 disconnected from the pressurized breathing apparatus.
- FIGURE 3 is a side elevation of the fireman equipped with my complete invention with all of its component parts connected together, as in FIGURE 1.
- FIGURE 4 is a fragmentary, horizontal section through the filter 8, taken on line 4-4, FIGURE 3.
- the filter 8 is provided with a short, corrugated hose 13 whose distal end is tubularly connected to the lateral arm 14 of a metal T pipe fitting 15.
- the coupling nut 16 of the T pipe fitting 15 is then screwed onto the demand regulator 7, while the coupling nut 17 of the mask hose 18 is screwed onto the upper end of said T pipe fitting 15, the upper end of said mask hose 18 being tubularly connected with a mask 20.
- An exhalation valve 21 is connected to the mask.
- the filter 8 isrconstructed of a cylindrical, metal, replaceable canister 22 whichis screwed into a metal, L, pipe fitting 23 in the lower bore of which is staked, or otherwise secured, a check valve 24.
- This check valve 24 allows ambient air to be sucked in through the corrugated, paper, filter element 25 and then to pass through said check valve 24 and thence into the short, corrugated, filter hose 13 tothe T pipe fitting 15. Any reverse fiow is, of course, prevented by said check valve 24.
- FIGURE 2 illustrates how the pressurized breathing apparatuscan be used as a commercial unit independently of the filter 8.
- FIGURE 3 illustrates :how a large quantity of standard pressurized breathing equipment can be carried on hand by the fire department, and, in addition, a limited number of filter assemblies kept available, any one of which can be joined to any one of the pressurized breathing apparatii, or idly hung of the chest strap 10 of the harness 5 (as in FIG- URE 2) for use in doubtful situations where itmight possibly be advantageous to have a contaminant filter available.
- Portable breathing apparatus comprising, incombination, a fiace mask, an exhalation valve connected to said mask, a filter tubularly connected .to said mask for supplying filtered ambient air to said mask, a container of compressed breathing fluid, a demand regulator of the positive pressure type tubularly connected to said container and to said mask for supplying breathing fluid to .said mask from said container on demand, and a check valve in the tubular connection between said filter and said mask preventing the escape of breathing fluid from said container through said filter, said filter, said container and said regulator being adapted to be carried by the user, wherein the tubular connections between said filter and said mask and between said regulator and said mask include a T fitting, means detachably connecting said fitting to said regulator, a first hose interconnecting said filter and said fitting, a second hose inter- '3 8 connecting said mask and saidjfitting, and means detachably connecting said second hose to said fitting both said means being interchangeable whereby said second hose can be detached from said fitting and attached to said regulator upon det
- Portable breathing apparatus comprising, in com- .bination, a face mask, an exhalation valve connected to said mask, a filter tubularly connected to said mask for supplying filtered ambient air to said mask, a container of-compressed breathing fluid, a demand regulator of the positive pressure type tubularly connected to said container and to said mask for supplying breathing fluid to said mask from said container on demand, and a check valve in the tubular connection between said filter and said mask preventing the escape of breathing fluid from said container through said filter, said filter, said container and said regulator being adapted'to be carried by the user, wherein the tubular connections between said filter and said mask and between said regulator and said mask include :a first hose connected to said filter, a second hose connected to said mask, means including a fitting carried by' said regulator for detachably connecting said'first hose to said second hose, thereby supplying filtered ambient air to said mask, and means detachably connected said second hose to said regulator for supplying breathing fluid to said mask from said container.
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- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Description
Aug. 24, 1965 A. E. MILLER 3,202,150
FILTER ATTACHMENT FOR A PRESSURIZED BREATHING APPARATUS Filed June 11, 1962 2 Sheets-Sheet 1 INVENTOR GzwifiPi'E M27??? Alig. 24, 1965 MILLER 3,202,150
FILTER ATTACHMENT FOR A PRESSURIZED BREATHING APPARATUS Filed June 11, 1962 2 Sheets-Sheet 2 auri fizu E Ali/fer BY AT T ORNE Y 3 vs Y I NVENTOR. R
United States Patent,
I s 202 150 FILTER ATTACHMENT FOR A PRESSURIZED BREATHING APPARATUS Arthur E. Miller, Buifalo, N.Y., assiguor to Scott Aviation This invention relates to the combination of a filter and a breathing apparatus, said combination being so constituted that the person who is wearing the combination may either breathe in ambient air which was originally slightly contaminated but which has been completely purified by .a filter or, optionally, may cut 01f this flow of ambient air through the filter and breathe in only breathing fluid that is supplied by a breathing apparatus from a tank of compressed breathing fluid.
The principal object of the invention is to enable a person, who is approaching an area which might be contaminated, to breathe in either pure air or lightly contaminated, ambient air through a purifying filter so long as the contaminants in the ambient air are not greater than the filter can adequately handle, and then, if or when the percentage of contaminants becomes excessive, to switch over from the filter to a breathing apparatus that is supplied by pure breathing air from a pressurized tank.
Other objects of the invention and practical solutions thereof are described in detail in the following specifications and in the accompanying drawings, wherein:
FIGURE 1 is a front elevation of the upper torso of a fireman equipped with my complete invention with all of its component part connected together.
FIGURE 2 is a similar front elevation, but showing the filter 8 disconnected from the pressurized breathing apparatus.
FIGURE 3 is a side elevation of the fireman equipped with my complete invention with all of its component parts connected together, as in FIGURE 1.
FIGURE 4 is a fragmentary, horizontal section through the filter 8, taken on line 4-4, FIGURE 3.
For convenience, I will describe my invention precisely as it is illustrated, but it is to be definitely understood that the breadth of my invention is to be measured solely by its intrinsic novelty and by the scope of the appended claims.
I will further assume that the user of my invention is a fireman and that he has been ordered to move into an \area which might be contaminated by nuclear fall-out,
and that he has prepared himself to go a maximum distance and directly to the heart of the catastrophe, after leaving an outlying region where he is sure that the ambient air is pure.
Now as he i about to enter the area where the ambient air might be contaminated, he dons a harness 5 which carries a pressurized air tank 6 on his back, and a demand regulator 7 and a filter 8 on his chest, said regulator and filter being hung on the chest strap 10 of the harness 5. He then connects the high-pressure, air-hose 11 of the air tank shut-off valve 12 with aforesaid demand regulator 7.
The filter 8 is provided with a short, corrugated hose 13 whose distal end is tubularly connected to the lateral arm 14 of a metal T pipe fitting 15. The coupling nut 16 of the T pipe fitting 15 is then screwed onto the demand regulator 7, while the coupling nut 17 of the mask hose 18 is screwed onto the upper end of said T pipe fitting 15, the upper end of said mask hose 18 being tubularly connected with a mask 20. An exhalation valve 21 is connected to the mask. (This mask 20 3 ,292,150 Patented Aug. 24, 1965 2 a can, of course, be replaced by an oro-na-sal mask orby a plain mouth piece, if desired.) i i As shown in FIGURE 4, the filter 8 isrconstructed of a cylindrical, metal, replaceable canister 22 whichis screwed into a metal, L, pipe fitting 23 in the lower bore of which is staked, or otherwise secured, a check valve 24. This check valve 24 allows ambient air to be sucked in through the corrugated, paper, filter element 25 and then to pass through said check valve 24 and thence into the short, corrugated, filter hose 13 tothe T pipe fitting 15. Any reverse fiow is, of course, prevented by said check valve 24. I Operation In FIGURES 1 and 3 we will at first assume that the shut-01f valve 12 of. the pressurized air tank 6 isclosed.
We will also assume in these FIGURES l and 3 that the fireman has left the area where the purity of the ambient air is unquestionable and that he is about to enter an area which may be at least lightly contaminated Withfor instance, atomic tall-out. He is, therefore, at this time about to breathe ambient air in through the filter 8 whose filter element is capable of removing small percentages of contaminants.
It is to be borne in mind that, at this time, he is not depleting the supply of compressed air in his tank 6, and hence is lengthening his radius of operations by put-ting off any breathing from said air tank just' as long as it is safe to do so.
Assuming that he is now moving straight to the center of the disaster, it is to be expected that, at some point or other, he will learn from his Geiger or other contaminant counter, that the contaminant percentage is too high for the filter 8 to adequately handle the difiiculty. At this point the fireman opens the shut-off valve 12 of his air tank 6 and also adjusts hi demand pressure regulator to provide a positive pressure. This prevents any inhalation pressure from opening the check valve 24 of the filter :8, and hence all the air he then breathes is supplied from the compressed air tank 6.
Dual use of breiathz'ng apparatus FIGURE 2 illustrates how the pressurized breathing apparatuscan be used as a commercial unit independently of the filter 8. In other Words, this FIGURE 3 illustrates :how a large quantity of standard pressurized breathing equipment can be carried on hand by the fire department, and, in addition, a limited number of filter assemblies kept available, any one of which can be joined to any one of the pressurized breathing apparatii, or idly hung of the chest strap 10 of the harness 5 (as in FIG- URE 2) for use in doubtful situations where itmight possibly be advantageous to have a contaminant filter available.
I claim:
1. Portable breathing apparatus comprising, incombination, a fiace mask, an exhalation valve connected to said mask, a filter tubularly connected .to said mask for supplying filtered ambient air to said mask, a container of compressed breathing fluid, a demand regulator of the positive pressure type tubularly connected to said container and to said mask for supplying breathing fluid to .said mask from said container on demand, and a check valve in the tubular connection between said filter and said mask preventing the escape of breathing fluid from said container through said filter, said filter, said container and said regulator being adapted to be carried by the user, wherein the tubular connections between said filter and said mask and between said regulator and said mask include a T fitting, means detachably connecting said fitting to said regulator, a first hose interconnecting said filter and said fitting, a second hose inter- '3 8 connecting said mask and saidjfitting, and means detachably connecting said second hose to said fitting both said means being interchangeable whereby said second hose can be detached from said fitting and attached to said regulator upon detachment of said fitting from said regulator. 72. T-he combination set forth in claim 1, together with a shut-01f valve interposed in the tubular connection between said regulator and said container. 7
3. Portable breathing apparatus comprising, in com- .bination, a face mask, an exhalation valve connected to said mask, a filter tubularly connected to said mask for supplying filtered ambient air to said mask, a container of-compressed breathing fluid, a demand regulator of the positive pressure type tubularly connected to said container and to said mask for supplying breathing fluid to said mask from said container on demand, and a check valve in the tubular connection between said filter and said mask preventing the escape of breathing fluid from said container through said filter, said filter, said container and said regulator being adapted'to be carried by the user, wherein the tubular connections between said filter and said mask and between said regulator and said mask include :a first hose connected to said filter, a second hose connected to said mask, means including a fitting carried by' said regulator for detachably connecting said'first hose to said second hose, thereby supplying filtered ambient air to said mask, and means detachably connected said second hose to said regulator for supplying breathing fluid to said mask from said container. r 7
References Cited by the Examiner UNITED STATES PATENTS 2,764,151 9/56 cu 128-142 2,818,066 12/57 Gliclden 1 2s 142 "2,948,292 8/60 Fitt 12s 142 RICHARD A. GAUDET, Primary Examiner.
JORDAN FRANKLIN, Examiner.
Claims (1)
1. PORTABLE BREATHING APPARATUS COMPRISING, IN COMBINATION, A FACE MASK, AN EXHALATION VALVE CONNECTED TO SAID MASK, A FILTER TUBULARLY CONNECTED TO SAID MASK FOR SUPPLYING FILTERED AMBIENT AIR TO SAID MASK, A CONTAINER OF COMPRESSED BREATHING FLUID, A DEMAND REGULATOR OF THE POSITIVE PRESSURE TYPE TUBULARLY CONNECTED TO SAID CONTAINER AND TO SAID MASK FOR SUPPLYING BREATHING FLUID TO SAID MASK FROM SAID CONTAINER ON DEMAND, AND A CHECK VALVE IN THE TUBULAR CONNECTION BETWEEN SAID FILTER AND SAID MASK PREVENTING THE ESCAPED OF BREATHING FLUID FROM SAID CONTAINER THROUGH SAID FILTER, SAID FILTER, SAID CONTAINER AND SAID REGULATOR BEING ADAPTED TO BE CARRIED BY THE USER, WHEREIN THE TUBULAR CONNECTIONS BETWEEN SAID FILTER AND SAID MASK AND BETWEEN SAID REGULATOR AND SAID MASK INCLUDE A T FITTING, MEANS DETACHABLY CONNECTING SAID FITTING TO SAID REGULATOR, A FIRST HOSE INTERCONNECTING SAID FILTER AND SAID FITTING, A SECOND HOSE INTERCONNECTING SAID MASK AND SAID FITTING, AND MEANS DETACHABLY CONNECTING SAID SECOND HOSE TO SAID FITTING BOTH SAID MEANS BEING INTERCHARGEABLE WHEREBY SAID SECOND HOSE CAN BE DETACHED FROM SAID FITTING AND ATTACHED TO SAID REGULATOR UPON DETACHMENT OF SAID FITTING FROM SAID REGULATOR.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US201521A US3202150A (en) | 1962-06-11 | 1962-06-11 | Filter attachment for a pressurized breathing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US201521A US3202150A (en) | 1962-06-11 | 1962-06-11 | Filter attachment for a pressurized breathing apparatus |
Publications (1)
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US3202150A true US3202150A (en) | 1965-08-24 |
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US201521A Expired - Lifetime US3202150A (en) | 1962-06-11 | 1962-06-11 | Filter attachment for a pressurized breathing apparatus |
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Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3773044A (en) * | 1971-03-10 | 1973-11-20 | R Wallace | Chemical breathing apparatus with alarm device |
US3803817A (en) * | 1971-11-02 | 1974-04-16 | Ato Inc | Filter assembly |
US4019507A (en) * | 1974-09-28 | 1977-04-26 | Dragerwerk Aktiengesellschaft | Protective breathing device having a filtering apparatus and additional oxygen supply for emergency use |
US4108172A (en) * | 1975-09-25 | 1978-08-22 | Moore Jr George B | Carbon dioxide absorption canister for use with analgesia equipment |
US4265238A (en) * | 1979-08-16 | 1981-05-05 | The United States Of America As Represented By The Secretary Of The Navy | Simulated oxygen breathing apparatus |
FR2511605A1 (en) * | 1981-08-20 | 1983-02-25 | Figgie Int Inc | CONTAINER FOR GAS FILTER |
DE3143103A1 (en) * | 1981-10-30 | 1983-05-11 | Drägerwerk AG, 2400 Lübeck | RESPIRATORY DEVICE AS A FILTER DEVICE WITH ADDITIONAL OXYGEN SUPPLY, ESPECIALLY AS AN ESCAPE DEVICE |
FR2543836A1 (en) * | 1983-04-06 | 1984-10-12 | Figgie Int Inc | RESPIRATORY MASK ASSEMBLY |
US4548626A (en) * | 1984-04-30 | 1985-10-22 | Figgie International Inc. | Particulate air filter assembly |
DE3512644A1 (en) * | 1985-04-06 | 1986-10-16 | Bartels & Rieger GmbH & Co, 5000 Köln | Protective breathing equipment |
EP0241188A1 (en) * | 1986-04-03 | 1987-10-14 | Racal Safety Limited | Improvements in and relating to breathing apparatus |
US4793342A (en) * | 1987-03-03 | 1988-12-27 | Terry McGovern Gaber | Emergency smoke hood and breathing mask |
US4841953A (en) * | 1986-11-07 | 1989-06-27 | Dodrill Gregg W | Auxiliary supply system for a portable self-contained breathing apparatus |
US4955373A (en) * | 1989-10-16 | 1990-09-11 | Maguire Iii John N | Air breathing assembly and air filter attachment therein |
WO1992010237A1 (en) * | 1990-12-04 | 1992-06-25 | Aran Fire & Safety (Uk) Limited | Improvements in or relating to safety helmets |
US5318019A (en) * | 1992-03-19 | 1994-06-07 | Celaya Marty A | Emergency portable oxygen supply unit |
US5562092A (en) * | 1993-06-14 | 1996-10-08 | George; Eric W. | Firefighter's emergency smoke filter |
US5592935A (en) * | 1995-05-03 | 1997-01-14 | Minnesota Mining And Manufacturing Company | Positive/negative air pressure adaptor for use with respirators |
EP0781156A1 (en) * | 1994-08-31 | 1997-07-02 | Lifepro, Inc. | Method of air filtration for fire fighter emergency smoke inhalation protection |
EP0803434A2 (en) * | 1996-04-23 | 1997-10-29 | HTM SPORT S.p.A. | Regulator for underwater breathing apparatus |
EP0847296A1 (en) * | 1995-09-01 | 1998-06-17 | Besha, Richard G. | Personal emergency breathing system for supplied air respirators |
US6398266B1 (en) | 1999-09-22 | 2002-06-04 | Ballard Medical Products | Collapse resistant popoid connector |
USD466607S1 (en) | 2001-08-27 | 2002-12-03 | Kimberly-Clark Worldwide, Inc. | Flexible connector |
USD473941S1 (en) | 2001-08-27 | 2003-04-29 | Kimberly-Clark Worldwide, Inc. | Flexible connecting device |
USD476731S1 (en) | 2001-08-27 | 2003-07-01 | Kimberly-Clark Worldwide, Inc. | Bendable connector |
USD486909S1 (en) | 2001-08-27 | 2004-02-17 | Kimberly-Clark Worldwide, Inc. | Bendable connecting device |
US20040182394A1 (en) * | 2003-03-21 | 2004-09-23 | Alvey Jeffrey Arthur | Powered air purifying respirator system and self contained breathing apparatus |
US20060048777A1 (en) * | 2003-03-21 | 2006-03-09 | Interspiro, Inc. | Apparatus and method for providing breathable air and bodily protection in a contaminated environment |
US20070235030A1 (en) * | 2003-08-22 | 2007-10-11 | Teetzel James W | Self-contained breathing system |
US20080053447A1 (en) * | 2006-08-29 | 2008-03-06 | Ratajczak John A | Adapter for air purifying filter |
US7513251B2 (en) * | 2005-06-13 | 2009-04-07 | Mel Blum | Hand-held potassium super oxide oxygen generating apparatus |
US7937775B2 (en) | 2005-08-09 | 2011-05-10 | Microtek Medical, Inc. | Surgical protective head gear assembly including high volume air delivery system |
US20120066819A1 (en) * | 2009-02-05 | 2012-03-22 | Materiels Industriels De Securite | Assembly for protecting an individual, comprising an insulation suit |
RU2461398C1 (en) * | 2011-03-21 | 2012-09-20 | Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации | Respiratory apparatus |
US8919340B2 (en) | 2012-03-22 | 2014-12-30 | Mel Blum | Hand-held potassium super oxide oxygen generating apparatus |
US9998687B2 (en) | 2012-09-12 | 2018-06-12 | Bae Systems Information And Electronic Systems Integration Inc. | Face mounted extreme environment thermal sensor system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2764151A (en) * | 1953-06-16 | 1956-09-25 | Scott Aviation Corp | Underwater breathing apparatus |
US2818066A (en) * | 1954-09-16 | 1957-12-31 | Acme Prot Equipment Company | Transfer mask |
US2948292A (en) * | 1956-06-16 | 1960-08-09 | Normalair Ltd | Breathing apparatus |
-
1962
- 1962-06-11 US US201521A patent/US3202150A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2764151A (en) * | 1953-06-16 | 1956-09-25 | Scott Aviation Corp | Underwater breathing apparatus |
US2818066A (en) * | 1954-09-16 | 1957-12-31 | Acme Prot Equipment Company | Transfer mask |
US2948292A (en) * | 1956-06-16 | 1960-08-09 | Normalair Ltd | Breathing apparatus |
Cited By (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3773044A (en) * | 1971-03-10 | 1973-11-20 | R Wallace | Chemical breathing apparatus with alarm device |
US3803817A (en) * | 1971-11-02 | 1974-04-16 | Ato Inc | Filter assembly |
US4019507A (en) * | 1974-09-28 | 1977-04-26 | Dragerwerk Aktiengesellschaft | Protective breathing device having a filtering apparatus and additional oxygen supply for emergency use |
US4108172A (en) * | 1975-09-25 | 1978-08-22 | Moore Jr George B | Carbon dioxide absorption canister for use with analgesia equipment |
US4265238A (en) * | 1979-08-16 | 1981-05-05 | The United States Of America As Represented By The Secretary Of The Navy | Simulated oxygen breathing apparatus |
FR2511605A1 (en) * | 1981-08-20 | 1983-02-25 | Figgie Int Inc | CONTAINER FOR GAS FILTER |
DE3230636A1 (en) * | 1981-08-20 | 1983-03-10 | Figgie International Inc., 44094 Willoughby, Ohio | CONTAINER FOR GLASS FILTER |
US4419110A (en) * | 1981-08-20 | 1983-12-06 | Figgie International Inc. | Gas filter container |
DE3143103A1 (en) * | 1981-10-30 | 1983-05-11 | Drägerwerk AG, 2400 Lübeck | RESPIRATORY DEVICE AS A FILTER DEVICE WITH ADDITIONAL OXYGEN SUPPLY, ESPECIALLY AS AN ESCAPE DEVICE |
FR2543836A1 (en) * | 1983-04-06 | 1984-10-12 | Figgie Int Inc | RESPIRATORY MASK ASSEMBLY |
US4548626A (en) * | 1984-04-30 | 1985-10-22 | Figgie International Inc. | Particulate air filter assembly |
DE3512644A1 (en) * | 1985-04-06 | 1986-10-16 | Bartels & Rieger GmbH & Co, 5000 Köln | Protective breathing equipment |
EP0241188A1 (en) * | 1986-04-03 | 1987-10-14 | Racal Safety Limited | Improvements in and relating to breathing apparatus |
US4841953A (en) * | 1986-11-07 | 1989-06-27 | Dodrill Gregg W | Auxiliary supply system for a portable self-contained breathing apparatus |
US4793342A (en) * | 1987-03-03 | 1988-12-27 | Terry McGovern Gaber | Emergency smoke hood and breathing mask |
US4955373A (en) * | 1989-10-16 | 1990-09-11 | Maguire Iii John N | Air breathing assembly and air filter attachment therein |
WO1992010237A1 (en) * | 1990-12-04 | 1992-06-25 | Aran Fire & Safety (Uk) Limited | Improvements in or relating to safety helmets |
US5318019A (en) * | 1992-03-19 | 1994-06-07 | Celaya Marty A | Emergency portable oxygen supply unit |
US5562092A (en) * | 1993-06-14 | 1996-10-08 | George; Eric W. | Firefighter's emergency smoke filter |
EP0781156B1 (en) * | 1994-08-31 | 2003-12-10 | Lifepro, Inc. | Method of air filtration for fire fighter emergency smoke inhalation protection |
EP0781156A1 (en) * | 1994-08-31 | 1997-07-02 | Lifepro, Inc. | Method of air filtration for fire fighter emergency smoke inhalation protection |
US5592935A (en) * | 1995-05-03 | 1997-01-14 | Minnesota Mining And Manufacturing Company | Positive/negative air pressure adaptor for use with respirators |
US5720280A (en) * | 1995-05-03 | 1998-02-24 | Minnesota Mining And Manufacturing Company | Attenuator for use with respirators |
EP0847296A1 (en) * | 1995-09-01 | 1998-06-17 | Besha, Richard G. | Personal emergency breathing system for supplied air respirators |
EP0847296A4 (en) * | 1995-09-01 | 2001-07-18 | Besha Richard G | Personal emergency breathing system for supplied air respirators |
EP0803434A3 (en) * | 1996-04-23 | 1997-12-29 | HTM SPORT S.p.A. | Regulator for underwater breathing apparatus |
EP0803434A2 (en) * | 1996-04-23 | 1997-10-29 | HTM SPORT S.p.A. | Regulator for underwater breathing apparatus |
US6398266B1 (en) | 1999-09-22 | 2002-06-04 | Ballard Medical Products | Collapse resistant popoid connector |
USD473941S1 (en) | 2001-08-27 | 2003-04-29 | Kimberly-Clark Worldwide, Inc. | Flexible connecting device |
USD476731S1 (en) | 2001-08-27 | 2003-07-01 | Kimberly-Clark Worldwide, Inc. | Bendable connector |
USD466607S1 (en) | 2001-08-27 | 2002-12-03 | Kimberly-Clark Worldwide, Inc. | Flexible connector |
USD486909S1 (en) | 2001-08-27 | 2004-02-17 | Kimberly-Clark Worldwide, Inc. | Bendable connecting device |
US20040182394A1 (en) * | 2003-03-21 | 2004-09-23 | Alvey Jeffrey Arthur | Powered air purifying respirator system and self contained breathing apparatus |
US20050022817A1 (en) * | 2003-03-21 | 2005-02-03 | Tvi Corporation | Breathing apparatus |
US20050109341A1 (en) * | 2003-03-21 | 2005-05-26 | Alvey Jeffrey A. | Powered air purifying respirator system and self contained breathing apparatus |
US20060048777A1 (en) * | 2003-03-21 | 2006-03-09 | Interspiro, Inc. | Apparatus and method for providing breathable air and bodily protection in a contaminated environment |
US20060191533A1 (en) * | 2003-03-21 | 2006-08-31 | Interspiro, Inc. | Powered air purifying respirator system and breathing apparatus |
US7380551B2 (en) | 2003-03-21 | 2008-06-03 | Tvi Corporation | Breathing apparatus |
US7543584B2 (en) | 2003-03-21 | 2009-06-09 | Interspiro, Inc. | Powered air purifying respirator system and breathing apparatus |
US20070235030A1 (en) * | 2003-08-22 | 2007-10-11 | Teetzel James W | Self-contained breathing system |
US10130831B2 (en) | 2003-08-22 | 2018-11-20 | Patriot Life Support, Inc. | Self-contained breathing system |
US8113198B2 (en) | 2003-08-22 | 2012-02-14 | Wilcox Industries Corp. | Self-contained breathing system |
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Owner name: FIGGIE INTERNATIONAL INC. Free format text: CHANGE OF NAME;ASSIGNOR:A-T-O INC.;REEL/FRAME:003866/0442 Effective date: 19810623 |