US3565068A - Breathing apparatus - Google Patents

Breathing apparatus Download PDF

Info

Publication number
US3565068A
US3565068A US3565068DA US3565068A US 3565068 A US3565068 A US 3565068A US 3565068D A US3565068D A US 3565068DA US 3565068 A US3565068 A US 3565068A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
oxygen
breathing
canister
apparatus
hood
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
Inventor
Allan Morris Bickford
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.)
Automatic Sprinkler Corp
Scott Technologies Inc
Automatic Sprinkler Corp of America
Original Assignee
Automatic Sprinkler Corp
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
Grant date

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B17/00Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
    • A62B17/08Protective coverings for animals
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00Respiratory apparatus
    • A62B7/10Respiratory apparatus with filter elements

Abstract

A self-contained emergency breathing apparatus comprising a chemical oxygen generator having an expandable casing, a delivery tube, a filter in the tube, a carbon dioxide absorber having a mouthbit, and a hood for covering the head of the user and enclosing the carbon dioxide absorber to form a closed circuit rebreathing system. The components of the system are encased in a compact package form in a container which can be carried by the user and readily opened in an emergency situation.

Description

Unlted States Patent 11113,565,068

[72] Inventor Allan Morr'm Bickford 1,929,343 10/1933 Bellom 128/ 142.6 East Aurora, N.Y. 2,821,192 1/1958 Monro 128/142.6 [211 pp 797,631 FOREIGN PATENTS [221 Filed 1969 324 908 1/1930 Great Britain 128/142 6 [45] Patented Feb. 23, 1971 [73] Assignee Automatic Sprinkler Corporation of PP America Assistant Examiner-G. F. Dunne Cleveland, Ohio Attorney.Chri'stel and Bean [54] BREATHING APPARATUS 9 Claims, 8 Drawing Figs.

[52] US. Cl. 128/142,

23/ 281 ABSTRACT: A self-contained emergency breathing ap- Illim A621) 7/08 paratus comprising a chemical oxygen generator having an ex- Search pandable casing a delivery tube a filter in the tube a carbon 1423, 1425 1427, 191, dioxide absorber having a mouthbit, and a hood for covering 142'-142-7;23/281 the head of the user and enclosing the carbon dioxide absorber to form a closed circuit rebreathing system. The com- [5 6] UNlTE g zgrz E fmENTs ponents of the system are encased in a compact package form 1,395,948 1 1/1921 Brager in a container which can be carried by the user and readily opened in an emergency situation.

PATENTEU FEB2 31s?! SHEET 1 BF 3 INVENTOR. 0270 72 77?. ,Bz'c'yfbrcl ATTOFNE Y5:

7 smears INVENTOR. GZ/bzz 77?. 152' 012 0212.

ATTOPNEYS.

VPATENTEDFIIEBZB l97| 1 r BREATHING APPARATUS BACKGROUND OF rrIEINvENrIoN This invention relates to breathing apparatus and, more particularly, to self-contained emergency escape breathing apparatus.

It is known to provide emergency breathing equipment for use in contaminated or oxygen deficient atmospheres. Very often, environments which normally have' adequate breathing air are susceptible to contamination :anddeple'tion of sufficient oxygen for breathing purposes so that it is necessary for such equipment to be readily accessible; It is desirable that such equipment be carried on the person} of the user in the event of an emergency. However,f existing emergency breathing equipment often is heavy andfcumbersorne and therefore awkward to wear or carry when not in use.

SUMMARY or THE INVENTION Accordingly, it is an object of the present invention to provide an emergency breathing apparatus which affords complete respiratory and eye protection with a minimum of equipment.

It is another object of the present invention to provide the foregoing in a compact packaged form that can be conveniently stored and carried by a user.

Generally speaking, the closed circuit emergency breathing apparatus of the present invention comprises an oxygen generator having a spring metal casingadapted to expand and protect the body and garments of the user against the heat of the generator during combustion, a deliverytube connecting the generator to a carbon dioxideabsorber having a mouthbit, a hood for covering the head of the user and enclosing the carbon dioxide absorber to form a true closed circuitrebreathing system, and spacer means mounted on the absorber for preventing collapse of the hood against the outlet ends of the absorber.

The foregoing and other objects, advantages and characterizing features of the present invention :willbecome clearly apparent from the ensuing detailed'description of an illustrative embodiment thereof, taken together with :the accompanying drawing wherein like reference nu'rneralsdenote like parts throughout the various views. "I

BRIEF DESCRIPTION OF THEDIiAvvINGs FIG. 1 is a perspective view of an emergency breathing apparatus of the present invention shown in use; 7

FIG. 2 is an exploded view of the-container for packaging the foregoing apparatus; I

FIG. 3 is a sectional view illustrating the means for securing and sealing the container; 1

FIG. 4 is a longitudinal sectional view of the oxygen generator of the present invention; a

FIG. 5 is a top plan view of the oxygen generator of FIG. 4;

FIG. 6 is a perspective view of the expandablecasing forthe oxygen generator;

FIG. 7 is an elevational view, partially in section, of the'carbon dioxide absorber assembly. of the present invention; and

FIG. 8 is a cross-sectional view of the carbon dioxide absorber assembly, taken about on line 8-8 of'FlG. 7.

BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT separation of said casings. A flat-elongated strip 32, bent to the inside configuration of casing 24 is fastened thereto as by means of an adhesive and has a portion 34 extending axially outwardly from casing 24'adapted to be snugly received within the peripheral walls of casing 26. A clip 27 is fastened or other wise fixedly secured to the outer surface of casing 24 and is adapted to be attached to the belt or other wearing apparel of the user. Means are provided for securing casings 24 and 26 together, such means comprising a wire 36 encircling container 10 with wire 36 disposed between the abutting edges of the respective casings. A plurality of staples 38 overlie wire 36 andhave opposite legs positioned in openings 25 of casings 24 and 26, respectively, andin openings 33 of strip 32. An elongated adhesive tape 40, preferably of the pressure sensitive type, is wrapped about wire 36 and staples 38 to secure them in place with the free end of the tape folded over the free end of wire 36 (FIG. 2). A short strip of tape 42 extending transversely of tape 40 is folded over the free end thereof to form a gripping tab 44 which can be grasped by the user's fingers to unwrap tape 40 from container 10 withdrawing along with it staples 38and wire 36 to permit separation of casings 24 and 26.

A significant feature of this invention is that oxygen generator 12, delivery tube 14, absorber canister 18, nose obstructor 20, and protective hood 22 encased in a disposable container '23, are compactly stowed and enclosed within container 10, in

the stored condition ,thereof prior to use.

Thus, all the components required for a self-contained emergency escape breathing apparatus are packaged within a small compact container of approximately 8 inches in length, 4 inches wide and 2 inches deep. The above dimensions are exemplary to illustrate. the small size of the container and i should not be taken as limiting the scope of this invention, it

being understood that various sizes of containers may be employed within the purview of this invention.

Oxygen generator 12 comprises a canister 46 having an oxygen generating unit,,hereafter referred to as an oxygen can-' die body 48, encased therein and capable of evolving oxygen upon burning. Oxygen candle 48 consists of a consolidated body having uniformly distributed therethrough an alkali metal chlorate or perchlorate which generates oxygen upon combustion, a finely divided oxidizable material such as iron powder for burning and supplying part of the heat needed for combustion, a binder such as inorganic glass fibers or steel wool for holding the mass together and aiding in the even decomposition of the chlorate or perchlorate, and barium peroxide or like chlorine fixes for chemically eliminating traces of chlorine gasreleased during thermal breakdown of the chlorate or perchlorate. Such oxygen candle compositions 50 of filter medium with candle body 48 and envelope 50 comprising a self-contained candle unit which can be handled and stored as such. Envelope 50 can be fonned, for example, of fiberglass impregnated with a silicate or other hardening agent in an amount sufficientto make the envelope shape sustaining in the desired form which, inthe' illustrated embodiment, generally corresponds to the interior dimensions of canister 46.

A bottom cap assembly 58 is-attached to the bottom of generator 12 and defines a chamber 60 into which filtered oxygen is collected. One end of a tube 62 communicates with chamber 60 for conveying oxygen therefrom and is adapted to be connected at its other end to delivery tube 14. Mounted on the top of generator 12 is a bracket 64 having an aperture therethrough for receiving a primer 66. A tab member 68 is mounted on top of bracket 64 and is provided with an offset portion 70 having an a rture 72 therethrough for receiving tube 62.

. In order to secure the top of oxygen generator 12 to casing 24, an internal casing reinforcing bracket 63 is adapted to receive a chain or a heat resistant cord (not shown) for encircling the upper end of oxygen generator 12.

A filter screen 47 is fitted against the apertured bottom wall 45 of the canister 46. A flanged nut 43 receives a screw 41 which holds cap 58 against a seal washer, thereby providing a gas tight assembly.

Combustion of oxygen candle 48 is initiated by an igniter composition 74 which comprises the foregoing oxygen evolving composition enriched with a metal powder, such as iron, to provide a concentrated area of the intense heat when ignited by primer 66. A firing mechanism, generally designated 76, comprises a bracket 78 mounted on tab member 68 and a shaft 80 extending therethrough. A firing pin 82 has an extension 84 mounted on shaft 80. A coiled spring 86 mounted on shaft 80 has a portion 88 biasing firing pin 82 in a counterclockwise direction as viewed in FIG. 4. Normally, pin 82 is held in the cocked position shown in FIG. 4 by means of a cotter pin 90 inserted in openings in the sides of bracket 78 and disposed in a groove 92 on the underside of extension 84. When cotter pin 90 is withdrawn, the force of spring 86 drives firing pin 82 into contact with primer 66 which initiates ignition of oxygen candle 48.

An important feature of the present invention is that the outer cylindrical wall of canister 46 is encased in a coiled sheet 94 of spring metal which is formed at its inner end to tightly engage about canister 46. That portion of sheet 94 which engages about canister 46 is dimensioned to fit between the crimped ends thereof. The remainder of sheet 94 extends below canister 46 and fits into bracket 61. Sheet 94 is held in its coiled condition within container when the latter is closed, and is released to its expanded condition when casings 24 and 26 are separated as shown in FIG. 1. The expanded coiled sheet serves as a spacing barrier to protect the user against burning contact with oxygen candle 48 while providing ventilating passages permitting cooling air to communicate with the heated peripheral surface of canister 46 and with the heat exchange surface provided by sheet 94, to dissipate the heat therefrom. The extension of sheet 94 below canister 46 provides additional protection against accidental contact therewith.

The carbon dioxide absorber assembly 18 comprises a corrugated canister 100 having a chamber 102 defined by a pair of spaced screens 104. Chamber 102 is connected to delivery tube 14 by means of an inlet bleed fitting 106. A mouthbit 108 is provided on canister 100 and communicates with chamber 102. Spacer means in the form of a pair of conical springs 110 are provided at opposite ends of canister 100 and bear against end screens 112 disposed in the endmost grooves of corrugated canister 100. The smaller ends of springs 100 are adapted to engage hood 22 upon inhalation to prevent hood 22 from collapsing against end screens 112. The spaces between screens 104 and 112 are filled with a suitable mixture of carbon dioxide absorbing granules 114. Upon exhalation, exhaled air is directed through the carbon dioxide absorbing material outwardly through end screens 112 into the interior of hood 22.

Four flapper valves 116 are mounted about openings or ports 118 in canister 100 and permit flow of breathing air from the interior of hood 22 into chamber 102 upon inhalation. Valves 116 close ports 118 upon exhalation to direct the exhaled air into the carbon dioxide absorbing material.

Hood 22 completely encloses the head of the wearer and is preferably formed of a transparent flexible plastic material. If desired, hood 22 may be formed of a generally opaque flexible plastic material having a transparent window portion for providing visibility. Hood 22 is fitted with a cord 25 for securing the lower open end around the neck in a manner to provide a closing which is not necessarily a gas tight seal but offers resistance to the free flow of gas from the hood.

in use, tab 44 is grasped by the userfingers and pulled to vunwrap tape 40 from about container 10. Staples 38 and wire 36 adhere to the adhesive side of tape 40 and are removed therewith to permit separation of casings 24 and 26. Casing 26 is removed and discarded permitting the coiled sheet of spring metal 94 to expand as shown in FIG. 1. Carbon dioxide absorber 18 is removed from casing 24 and the mouthbit 108 is placed in the mouth of the user. Nose clip or nose obstructor 20 carried by absorber assembly 18 is used to prevent inadvertent exhalation through the nostrils. The assembly canister has molded portions engaging the nose clip wire. Hood 22 is removed from disposable container 23, placed over the wearers head and tightened about the neck by means of cord 25.

To initiate the oxygen evolving process, cotter pin is withdrawn to release firing pin 82 and allow the force of spring 86 to drive firing pin 82 into contact with primer 66 thereby initiating ignition of ,oxygen candle 48. Oxygen is supplied through delivery tube 14 and is bled into chamber 102 of carbon dioxide absorber 18 at a rate sufficient to meet the oxygen consumption of the user. Thus, pure oxygen is supplied through delivery tube 14 to supplement the oxygen contained in the breathing air' within the hood which flows through openings 118 upon inhalation. Upon exhalation, gas is directed through the carbon dioxide absorbent material outwardly through end screens 112 and into the space within the interior of the hood. Excessive gas pressure within the hood, such as when oxygen flow is greater than that consumed, is discharged by leakage at the neck closure. Thus, a true closed circuit rebreathing system is formed with duration determined by the carbon dioxide absorbing capacity and the capacity of oxygen evolving candle 48. Eyes are protected from toxious fumes and smoke and a full field of vision is provided by the transparent material of the hood. Heat generated by the carbon dioxide absorption reaction is dissipated to the atmosphere through the large surface area presented by the plastic hood so that the resulting temperature of inhaled gas is relatively low and comfortable. Where resistance to external ambient heat is desired, the hood may be made from a heat transparent material, such as a polimide film for example. Added heat resistance can be provided by applying a reflective coating to the surface of the hood, leaving only enough transparent surface for visibility.

From the foregoing, it is seen that the objects of the present invention have been fully accomplished. As a result of this invention, an improved closed circuit breathing apparatus is provided for use in escape from toxic atmospheres. The apparatus affords complete respiratory and eye protection with a minimum of components and is contained in a relatively small pocket-sized package. Although the apparatus of this invention can be used with other means for supplying oxygen, such as compressed or liquified oxygen or air, it is preferably used with a chemically derived oxygen supply, as herein described, because only a minimum of components are required to control the flow of oxygen thereby making possible a lighter, smaller and less complicated apparatus. Also, the package can be kept sealed for an indefinite period with no inspection and maintenance required.

A preferred embodiment of the principles of this invention having been described and illustrated, it is to be realized that modifications thereof can be made without departing from the broad spirit and scope of this invention as defined in the appended claims.

1 claim:

1. A breathing apparatus comprising a source of oxygen; a carbon dioxide absorber assembly including a mouthbit; a hood adapted to shroud the entire head of the wearer and cover said assembly; a tube connecting said source of oxygen to the interior of said hood; said hood having an opening and means closing said opening about a wearer's neck when in use; and a container for housing said source of oxygen, said assembly, said tube and said hood in compact kit fonn prior to use.

2. A breathing apparatus according to claim 1 wherein said source of oxygen comprises an oxygen generator having a canister and an oxygen evolving body, said canister having a chamber connected to said delivery tube.

3. A breathing apparatus according to claim 2 together with a casing formed of a springy material connected to said canister wrapped tightly thereabout when enclosed in said container, said casing being adapted to expand radially outwardly when said container is opened.

4. A breathing apparatus according to claim 1 wherein said container is formed of two sections, one of said sections mounting said oxygen generator, and means securing said sections together.

5. A breathing apparatus according to claim 4 wherein said securing means includes a wire encircling said sections, staples overlying said wire and holding said sections together, and a strip of material adhesively secured to said staples and said wire and having a pull tab at one end thereof.

6. A breathing apparatus according to claim 1 wherein said assembly comprises a canister, achamber in said canister communicating with said tube, and carbon dioxide absorbent material in said canister on opposite sides of said chamber.

7. A breathing apparatus according to claim 6 together with at least one port in said chamber, and valve means for opening said port upon inhalation and closing said port upon exhalation to direct exhaled air into the carbon dioxide absorbent material.

8. A breathing apparatus according to claim 7 together with spacer means provided at the opposite ends of said canister for preventing collapse of said hood against said opposite ends of said canister.

9. A breathing apparatus according to claim 1 together with an obstructor adapted to close the nose passages of the wearer.

Claims (8)

  1. 2. A breathing apparatus according to claim 1 wherein said source of oxygen comprises an oxygen generator having a canister and an oxygen evolving body, said canister having a chamber connected to said delivery tube.
  2. 3. A breathing apparatus according to claim 2 together with a casing formed of a springy material connected to said canister wrapped tightly thereabout when enclosed in said container, said casing being adapted to expand radially outwardly when said container is opened.
  3. 4. A breathing apparatus according to claim 1 wherein said container is formed of two sections, one of said sections mounting said oxygen generator, and means securing said sections together.
  4. 5. A breathing apparatus according to claim 4 wherein said securing means includes a wire encircling said sections, staples overlying said wire and holding said sections together, and a strip of material adhesively secured to said staples and said wire and having a pull tab at one end thereof.
  5. 6. A breathing apparatus according to claim 1 wherein said assembly comprises a canister, a chamber in said canister communicating with said tube, and carbon dioxide absorbent material in said canister on opposite sides of said chamber.
  6. 7. A breathing apparatus according to claim 6 together with at least one port in said chamber, and valve means for opening said port upon inhalation and closing said port upon exhalation to direct exhaled air into the carbon dioxide absorbent material.
  7. 8. A breathing apparatus according to claim 7 together with spacer means provided at the opposite ends of said canister for preventing collapse of said hood against said opposite ends of said canister.
  8. 9. A breathing apparatus according to claim 1 together with an obstructor adapted to close the nose passages of the wearer.
US3565068A 1969-02-07 1969-02-07 Breathing apparatus Expired - Lifetime US3565068A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US79763169 true 1969-02-07 1969-02-07

Publications (1)

Publication Number Publication Date
US3565068A true US3565068A (en) 1971-02-23

Family

ID=25171380

Family Applications (1)

Application Number Title Priority Date Filing Date
US3565068A Expired - Lifetime US3565068A (en) 1969-02-07 1969-02-07 Breathing apparatus

Country Status (1)

Country Link
US (1) US3565068A (en)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739774A (en) * 1970-05-21 1973-06-19 Ml Aviation Co Ltd Respirators
US3742683A (en) * 1971-05-03 1973-07-03 Mine Safety Appliances Co Oxygen producing unit with cooled casing
US3895625A (en) * 1973-03-01 1975-07-22 Ulmer Aeronautique Sa Head protection enclosure
DE2539175A1 (en) * 1974-09-16 1976-03-25 Bendix Corp Atmungsgeraet closed cycle
US4164218A (en) * 1977-12-09 1979-08-14 Midori Anzen Company, Ltd. Personal escape breathing apparatus
US4261355A (en) * 1978-09-25 1981-04-14 Glazener Edwin L Constant positive pressure breathing apparatus
US4342725A (en) * 1978-10-19 1982-08-03 Preiser Scientific, Incorporated Oxygen supply apparatus
US4409978A (en) * 1980-06-16 1983-10-18 Portable Air Supply Systems, Corp. Portable, self-contained breathing apparatus
US4452240A (en) * 1981-10-05 1984-06-05 E. D. Bullard Company Respiratory protection apparatus
US4597917A (en) * 1983-04-19 1986-07-01 Lunsford Kevin S Portable medical gas warming system
US4614186A (en) * 1984-11-19 1986-09-30 Molecular Technology Corporation Air survival unit
EP0197641A1 (en) * 1985-03-12 1986-10-15 E.I. Du Pont De Nemours And Company Decompression and toxic fume protection apparatus
US4627431A (en) * 1985-03-12 1986-12-09 E. I. Du Pont De Nemours And Company Protective hood with CO2 absorbent
DE3719426A1 (en) * 1987-06-11 1988-12-22 Draegerwerk Ag Folded protection cover with an oxygen mask
US4793342A (en) * 1987-03-03 1988-12-27 Terry McGovern Gaber Emergency smoke hood and breathing mask
US4862147A (en) * 1985-08-26 1989-08-29 Puritan-Bennett Aero Systems Company Smoke alarm with dropout smoke hood
US4926855A (en) * 1984-09-21 1990-05-22 Interspiro Ab Respirator
US4963327A (en) * 1988-03-23 1990-10-16 Z-Gard, Inc. Oxygen generating module
FR2646781A1 (en) * 1989-05-12 1990-11-16 Lemasson Yves Breathing device and assembly, in particular for unbreathable atmosphere, in particular for contaminated environment
US5016625A (en) * 1989-08-23 1991-05-21 Hsu Chi Hsueh Full head respirator
US5040528A (en) * 1989-10-13 1991-08-20 Neill Wilbur J O Autonomous breathing system for underwater diver's headgear
US5065745A (en) * 1989-09-29 1991-11-19 Micronel Ag Portable respiratory protection device
WO1993003794A1 (en) * 1991-08-27 1993-03-04 Ottestad Breathing Systems As A self-sufficient emergency breathing device
US5690101A (en) * 1995-07-14 1997-11-25 Kutta; Helmuth W. Portable air purifier with chemical reaction zone
USRE36199E (en) * 1991-04-10 1999-04-27 Be Intellectual Property, Inc. Chemical oxygen generator
US6340024B1 (en) 1993-01-07 2002-01-22 Dme Corporation Protective hood and oral/nasal mask
US6443149B1 (en) * 1996-09-06 2002-09-03 Mine Safety Appliances Company Closed circuit escape breathing apparatus
WO2003035181A1 (en) * 2001-10-24 2003-05-01 Daniel Shahaf Inhalation protection apparatuses
US20040118397A1 (en) * 2002-12-23 2004-06-24 Swann Linsey J. Personal disposable emergency breathing system with radial flow
US6805124B2 (en) 1998-07-24 2004-10-19 3M Innovative Properties Company Face mask that has a filtered exhalation valve
US20070163587A1 (en) * 2006-01-19 2007-07-19 Teibel Jeffrey L Oral respirator device and method for mask-free filtering of particulates from breathed air
US20090032023A1 (en) * 2006-03-09 2009-02-05 Basf Se Closed reversible breathing apparatus having a metal organic framework
US20090235928A1 (en) * 2008-03-13 2009-09-24 Maurizio Borsari Helmet for artificial respiration without the aid of face masks or tracheal tubes, with improved wearability
US20110277768A1 (en) * 2009-09-30 2011-11-17 Hill Michael T Emergency Breathing Apparatus
US20120118289A1 (en) * 2009-07-20 2012-05-17 Oe-Hyeon Han Oxygen respirator having emergency illumination lamp for use in case of fire
CN103172029A (en) * 2011-12-25 2013-06-26 西安西诺科技工业公司 Mining oxygen candle protection and purification system
US8845325B1 (en) * 2010-10-26 2014-09-30 The United States Of America As Represented By The Secretary Of The Navy Oxygen candle furnace ignition fitting
US20150101602A1 (en) * 2013-10-11 2015-04-16 Avox Systems Inc. Compact filter assembly for possible use in an aircraft
US9028769B2 (en) 2011-12-15 2015-05-12 Pacific Precision Products Mfg. Handheld portable oxygen generator for use in extreme environments

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1395948A (en) * 1921-06-09 1921-11-01 Drager Alexander Bernhard Helmet and mask for use with respiratory apparatus
GB324908A (en) * 1928-10-30 1930-01-30 Robinson Dickinson Improvements in toasting appliances
US1929343A (en) * 1930-05-16 1933-10-03 Belloni Angelo Respiratory hood
US2821192A (en) * 1958-01-28 Monro

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821192A (en) * 1958-01-28 Monro
US1395948A (en) * 1921-06-09 1921-11-01 Drager Alexander Bernhard Helmet and mask for use with respiratory apparatus
GB324908A (en) * 1928-10-30 1930-01-30 Robinson Dickinson Improvements in toasting appliances
US1929343A (en) * 1930-05-16 1933-10-03 Belloni Angelo Respiratory hood

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739774A (en) * 1970-05-21 1973-06-19 Ml Aviation Co Ltd Respirators
US3742683A (en) * 1971-05-03 1973-07-03 Mine Safety Appliances Co Oxygen producing unit with cooled casing
US3895625A (en) * 1973-03-01 1975-07-22 Ulmer Aeronautique Sa Head protection enclosure
DE2539175A1 (en) * 1974-09-16 1976-03-25 Bendix Corp Atmungsgeraet closed cycle
US3976063A (en) * 1974-09-16 1976-08-24 The Bendix Corporation Escape breathing apparatus
US4164218A (en) * 1977-12-09 1979-08-14 Midori Anzen Company, Ltd. Personal escape breathing apparatus
US4261355A (en) * 1978-09-25 1981-04-14 Glazener Edwin L Constant positive pressure breathing apparatus
US4342725A (en) * 1978-10-19 1982-08-03 Preiser Scientific, Incorporated Oxygen supply apparatus
US4409978A (en) * 1980-06-16 1983-10-18 Portable Air Supply Systems, Corp. Portable, self-contained breathing apparatus
US4452240A (en) * 1981-10-05 1984-06-05 E. D. Bullard Company Respiratory protection apparatus
US4597917A (en) * 1983-04-19 1986-07-01 Lunsford Kevin S Portable medical gas warming system
US4926855A (en) * 1984-09-21 1990-05-22 Interspiro Ab Respirator
US4614186A (en) * 1984-11-19 1986-09-30 Molecular Technology Corporation Air survival unit
EP0197641A1 (en) * 1985-03-12 1986-10-15 E.I. Du Pont De Nemours And Company Decompression and toxic fume protection apparatus
US4627431A (en) * 1985-03-12 1986-12-09 E. I. Du Pont De Nemours And Company Protective hood with CO2 absorbent
US4862147A (en) * 1985-08-26 1989-08-29 Puritan-Bennett Aero Systems Company Smoke alarm with dropout smoke hood
US4793342A (en) * 1987-03-03 1988-12-27 Terry McGovern Gaber Emergency smoke hood and breathing mask
DE3719426A1 (en) * 1987-06-11 1988-12-22 Draegerwerk Ag Folded protection cover with an oxygen mask
US4963327A (en) * 1988-03-23 1990-10-16 Z-Gard, Inc. Oxygen generating module
FR2646781A1 (en) * 1989-05-12 1990-11-16 Lemasson Yves Breathing device and assembly, in particular for unbreathable atmosphere, in particular for contaminated environment
US5016625A (en) * 1989-08-23 1991-05-21 Hsu Chi Hsueh Full head respirator
US5065745A (en) * 1989-09-29 1991-11-19 Micronel Ag Portable respiratory protection device
US5040528A (en) * 1989-10-13 1991-08-20 Neill Wilbur J O Autonomous breathing system for underwater diver's headgear
USRE36199E (en) * 1991-04-10 1999-04-27 Be Intellectual Property, Inc. Chemical oxygen generator
WO1993003794A1 (en) * 1991-08-27 1993-03-04 Ottestad Breathing Systems As A self-sufficient emergency breathing device
US5526804A (en) * 1991-08-27 1996-06-18 Ottestad Breathing Systems As Self-sufficient emergency breathing device
US6340024B1 (en) 1993-01-07 2002-01-22 Dme Corporation Protective hood and oral/nasal mask
US5690101A (en) * 1995-07-14 1997-11-25 Kutta; Helmuth W. Portable air purifier with chemical reaction zone
US6443149B1 (en) * 1996-09-06 2002-09-03 Mine Safety Appliances Company Closed circuit escape breathing apparatus
US6805124B2 (en) 1998-07-24 2004-10-19 3M Innovative Properties Company Face mask that has a filtered exhalation valve
WO2003035181A1 (en) * 2001-10-24 2003-05-01 Daniel Shahaf Inhalation protection apparatuses
US20040118397A1 (en) * 2002-12-23 2004-06-24 Swann Linsey J. Personal disposable emergency breathing system with radial flow
US6761162B1 (en) * 2002-12-23 2004-07-13 Brookdale International Systems, Inc. Personal disposable emergency breathing system with radial flow
US20070163587A1 (en) * 2006-01-19 2007-07-19 Teibel Jeffrey L Oral respirator device and method for mask-free filtering of particulates from breathed air
US20090032023A1 (en) * 2006-03-09 2009-02-05 Basf Se Closed reversible breathing apparatus having a metal organic framework
US20090235928A1 (en) * 2008-03-13 2009-09-24 Maurizio Borsari Helmet for artificial respiration without the aid of face masks or tracheal tubes, with improved wearability
EP2100635A3 (en) * 2008-03-13 2009-10-28 Dimar S.R.L. Helmet for artificial respiration without the aid of face masks or tracheal tubes, with improved wearability
US20120118289A1 (en) * 2009-07-20 2012-05-17 Oe-Hyeon Han Oxygen respirator having emergency illumination lamp for use in case of fire
US20110277768A1 (en) * 2009-09-30 2011-11-17 Hill Michael T Emergency Breathing Apparatus
US8845325B1 (en) * 2010-10-26 2014-09-30 The United States Of America As Represented By The Secretary Of The Navy Oxygen candle furnace ignition fitting
US9028769B2 (en) 2011-12-15 2015-05-12 Pacific Precision Products Mfg. Handheld portable oxygen generator for use in extreme environments
CN103172029A (en) * 2011-12-25 2013-06-26 西安西诺科技工业公司 Mining oxygen candle protection and purification system
CN103172029B (en) * 2011-12-25 2016-05-18 西安西诺科技工业公司 Ore with a protective oxygen candles purification system
US20150101602A1 (en) * 2013-10-11 2015-04-16 Avox Systems Inc. Compact filter assembly for possible use in an aircraft

Similar Documents

Publication Publication Date Title
US3604416A (en) Emergency oxygen system
US3521629A (en) Heat and smoke protective hoods
US3739774A (en) Respirators
US4726365A (en) Air filtering apparatus
US7658891B1 (en) Air purification and decontamination for hazmat suits
US4573464A (en) Filter respirator for protection against smoke and toxic gases
US4411023A (en) Smoke protective hood
US5048516A (en) Respiratory mask
US4197213A (en) Method and apparatus for the pyrotechnic generation of multi-component gases
US4996982A (en) Emergency breathing apparatus with holster released regulator valve
US4583535A (en) Protection mask
US6681765B2 (en) Antiviral and antibacterial respirator mask
US5309571A (en) Fire-protecting suit
US2558756A (en) Oxygen generator
US5620664A (en) Personal oxygen dispenser
US5628308A (en) Heat and fire resistant respiratory filtration mask
US4803980A (en) Automatic breathing mask release mechanism
US4926855A (en) Respirator
US4032991A (en) Face and head protective device
US4552140A (en) Emergency escape device
US6763835B1 (en) Chemical/biological special operations mask
US3140590A (en) Air conditioner for a face mask
US4793342A (en) Emergency smoke hood and breathing mask
US4172454A (en) Heat and gas protection suit
US6543450B1 (en) Survival mask

Legal Events

Date Code Title Description
AS Assignment

Owner name: FIGGIE INTERNATIONAL INC.

Free format text: CHANGE OF NAME;ASSIGNOR:A-T-O INC.;REEL/FRAME:003866/0442

Effective date: 19810623

AS Assignment

Owner name: FIGGIE INTERNATIONAL INC.

Free format text: MERGER;ASSIGNOR:FIGGIE INTERNATIONAL INC., (MERGED INTO) FIGGIE INTERNATIONAL HOLDINGS INC. (CHANGED TO);REEL/FRAME:004767/0822

Effective date: 19870323