US2032101A - Fume and dust eliminator - Google Patents

Fume and dust eliminator Download PDF

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Publication number
US2032101A
US2032101A US7371A US737135A US2032101A US 2032101 A US2032101 A US 2032101A US 7371 A US7371 A US 7371A US 737135 A US737135 A US 737135A US 2032101 A US2032101 A US 2032101A
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Prior art keywords
air
shield
face
fume
screen
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Expired - Lifetime
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US7371A
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William D Sullivan
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    • 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
    • A62B18/003—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 having means for creating a fresh air curtain

Definitions

  • the purpose of this invention is to provide a fume elin uiator or airshield for protecting the face while spraying with paint or other products, and which may also be used as a protection from poisonous gases, smoke, or the like, in which the nostrils, mouth, and eyes are open and free, and
  • the invention is a shield adapted to be placed 0 around the forehead and connected to means for supplying air under pressure, in which a series of relatively fine holes are provided which are positioned to discharge a continuous film of air over the face and outward therefrom.
  • gas masks or protectcrs
  • some of these are supplied with oxygen or air, however, substantially all of.
  • these are mechanical devices that form a covering over the nose and mouth, and thereby cause restrictedbreathing or choking, and very few make any attempt to protect the eyes, and when they do, they restrict the vision, therefore, it is desirable to provide a continuous screen in a form of a film of air which will completely cover the face, preventing products or fumes reaching the eyes, nose,'or mouth, and at the same time supplying an abundance of fresh air.
  • the object of the invention is, therefore, to provide an air screen completely covering the face, spaced slightly outward therefrom and sloping outward and downward.
  • Another object is to provide a, curtain of air over the face which may be supplied continuously, or which may be turned on or off as desired.
  • Another object is to provide a continuous curtain of air over the face in which the density thereof may be varied for different purposes.
  • a further-object is to provide a device for forming a curtain of air over the face which may readily be installed on the forehead or removed therefrom.
  • the invention embodies a shield adapted to be placed over the forehead having an air chamber therein, and having outwardly slanting openings in the lower end of the air chamber, and means for providing air under pressure to said air chamber.
  • Figure I is a view showing the device installed over the face with air currents being discharged downward, as indicated by the dotted lines.
  • Figure 2 is a view showing a profile of the face showing the air curtain sloping outward.
  • FIG. 3 is a cross section through the device in the preferred form.
  • Figure 4 is a View showing a front elevation of the device.
  • Figure 5 is a view showing the under side of 10 the device, showing openings gradually increasing in size from the air connection to the opposite side of the device;
  • Figure 6 is a view showing the device connected to a spray gun.
  • Figure 7 is a view showing an alternate arrangement in which a tube is provided with open-' ings in the lower side in place of the shield, which is shown in Figure 3, and a valve is shown in the connection for controlling the air. 20
  • Figure 8 is a view showing another alternate design in which the device is shown incorporated in a cap with the air currents downwardly directed from the'under side of the visor thereof.
  • the device is shown as it may 25 be made wherein numeral I indicates the shield, numeral 2 an air hose extending from the shield, and numeral 3 a spray gun, or otherdevice in combination with which the device may beused.
  • The' shield I is preferably made of rubber, 30"
  • this shield is made with a substantially fiat. back 4, having an inclined section 5 at the lower end 35 with an opening 6 therein, and the opening fi is provided with an inlet connection 'I to which an air hose 2 may be connected as shown.
  • connection 1 r may be located at any point or points, so that 40 air may be supplied to the shield or to the cham-' her 6 therein, at any other point, or points, or as may be desired.
  • the shield l maybe connected to a strap or elastic band 9 which may extend around the head, and it will be understood that this band may be made of any materialfand may be arranged'in any mannerfand it will be'understood that any other means fmay be used for holding the shield upon the forehead. It will be noted that with the shield arranged in this manner and.
  • the air through the openings 8 will be discharged downward and outward, forming a film, air screen, or curtain iii, as shown in Figures 1- and 2, and it will also be understood that the openings 8 may be located at any other point or points, or provided in any position to change the angle of the screen, or
  • curtain or in order to provide acurtain or screen tion iifjto an air supply pipe i2 of the gun. How'fever, it will be understood that the device may be used with spray guns of diiferent types, and
  • connection with the air supply line thereof may be made atany point or points. It is preferred, however, to make the connection before the hose enters the spray gun sothat a continuous supply of air will be provided w ne shield, thereby making it possible to provide the air screen whether or not the spray gun isjin operation.
  • the device is formed with a tube 03 having perforations [4 in the lowerside, and this is connected to an air hose i5 having avalve l6 therein, and it will be noted that the valve i5 will control the flow of air to the member l3 that this may be turned on or'ofi, or so that a screen of any density may be provided. It will befunderstood that the valve [6 may be used with tlie type of shield shown 'in 40' Figures 3, 4, and 5, and also in the arrangement shown in Figure 6, or with a device of any type or description; v Q
  • the device is incorporated in a cap IT by providing a tube L8 around the visor l9, and connecting openings from the tube l8 through the' cap, or under the visor, so that airstreams will project downward 7 means, or in any manner.
  • the shield may be placed upon the forehead and connected to any suitable means for supplying air under pressure, and as'the air is supplied, it will pass out of the small openings downward and over the face, as shown in Figures 1 and 2, thereby forming a continuous film, screen, or curtain which, being formed of air, will be transparent and which will supply a continuous amount of fresh air, thereby not only protecting the face, but maintaining anfabundance of clean fresh air which will' make it possible to spray with paint or any other product without the product-coming in contact with the face, which will also make it possible to;pass through dust,
  • A- relatively small flat shield adapted to be placed over the forehead directly above the eyebrows having a continuous chamber therein with perforations extending through the lower edge of the'device and communicating with the chamber device is of a triangular shape and the chamber with the perforations also inclined and adapted to-eject the 'air in an outward downward direction, and a' connection at one end of the device adapted to extend therefrom to a means characterized in that the lower portion of the

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Description

Feb. 25, w D ULLWAN FUME AND DUST ETJIMINATOR Filed Feb. 20,.1935
I N \"ENTOR.
u /y/lamaau/m ATIK "E-IIJQY.
?atented Feb. 25, 1936 iTED srA 'ras PATENT orrics FUME AND DUST nnnvmwroa William D. Sullivan, West New York, N. J. Application February 20,1935, sci-arm). 7,371 -1 Claim. (01. 128-145) The purpose of this invention is to provide a fume elin uiator or airshield for protecting the face while spraying with paint or other products, and which may also be used as a protection from poisonous gases, smoke, or the like, in which the nostrils, mouth, and eyes are open and free, and
- also in which an abundance of fresh air is continuously provided.
The invention is a shield adapted to be placed 0 around the forehead and connected to means for supplying air under pressure, in which a series of relatively fine holes are provided which are positioned to discharge a continuous film of air over the face and outward therefrom.
Many different forms of gas masks, or protectcrs, have been provided, and some of these are supplied with oxygen or air, however, substantially all of. these are mechanical devices that form a covering over the nose and mouth, and thereby cause restrictedbreathing or choking, and very few make any attempt to protect the eyes, and when they do, they restrict the vision, therefore, it is desirable to provide a continuous screen in a form of a film of air which will completely cover the face, preventing products or fumes reaching the eyes, nose,'or mouth, and at the same time supplying an abundance of fresh air.
The object of the invention is, therefore, to provide an air screen completely covering the face, spaced slightly outward therefrom and sloping outward and downward. I
Another object is to provide a, curtain of air over the face which may be supplied continuously, or which may be turned on or off as desired.
Another object is to provide a continuous curtain of air over the face in which the density thereof may be varied for different purposes.
A further-object is to provide a device for forming a curtain of air over the face which may readily be installed on the forehead or removed therefrom.
.And astill further object is to provide means for forming an air screen or curtain over the face which is comparatively simple and inexpensive.
With these ends in view the invention embodies a shield adapted to be placed over the forehead having an air chamber therein, and having outwardly slanting openings in the lower end of the air chamber, and means for providing air under pressure to said air chamber.
Other features and advantages of the invention will appear from the following description, taken in connection with the drawing, wherein:
Figure I is a view showing the device installed over the face with air currents being discharged downward, as indicated by the dotted lines.
Figure 2 is a view showing a profile of the face showing the air curtain sloping outward.
' Figure 3 is a cross section through the device in the preferred form. V
Figure 4 is a View showing a front elevation of the device.
Figure 5 is a view showing the under side of 10 the device, showing openings gradually increasing in size from the air connection to the opposite side of the device;
Figure 6 is a view showing the device connected to a spray gun. l5
Figure 7 is a view showing an alternate arrangement in which a tube is provided with open-' ings in the lower side in place of the shield, which is shown in Figure 3, and a valve is shown in the connection for controlling the air. 20
Figure 8 is a view showing another alternate design in which the device is shown incorporated in a cap with the air currents downwardly directed from the'under side of the visor thereof.
In the drawing the device is shown as it may 25 be made wherein numeral I indicates the shield, numeral 2 an air hose extending from the shield, and numeral 3 a spray gun, or otherdevice in combination with which the device may beused.
The' shield I is preferably made of rubber, 30"
however it will be understood that it may be made of any material, and may be ofany shape or design. In the design shown in Figures 3, 4, and 5, this shield is made with a substantially fiat. back 4, having an inclined section 5 at the lower end 35 with an opening 6 therein, and the opening fi is provided with an inlet connection 'I to which an air hose 2 may be connected as shown. It. will be understood, however, that the connection 1 r, may be located at any point or points, so that 40 air may be supplied to the shield or to the cham-' her 6 therein, at any other point, or points, or as may be desired. In the lower outer corner-of the chamber 6 is a plurality of openings 8, the size of which is graduated, as shown in Figure 5, 5 so that the small openings are located adjacent the connection 1 as the pressure of the air will be greater at this point, and as the air is distributed around the reservoir or chamber, the. size of the openings is increased as the air pres-. 50 sure will drop. It will be understood that any other'means may be used for compensating for the change in pressure of the air, and thismay be The shield l maybe connected to a strap or elastic band 9 which may extend around the head, and it will be understood that this band may be made of any materialfand may be arranged'in any mannerfand it will be'understood that any other means fmay be used for holding the shield upon the forehead. It will be noted that with the shield arranged in this manner and.
mounted upon the forehead, the air through the openings 8 will be discharged downward and outward, forming a film, air screen, or curtain iii, as shown in Figures 1- and 2, and it will also be understood that the openings 8 may be located at any other point or points, or provided in any position to change the angle of the screen, or
"curtain, or in order to provide acurtain or screen tion iifjto an air supply pipe i2 of the gun. How'fever, it will be understood that the device may be used with spray guns of diiferent types, and
the connection with the air supply line thereof may be made atany point or points. it is preferred, however, to make the connection before the hose enters the spray gun sothat a continuous supply of air will be provided w ne shield, thereby making it possible to provide the air screen whether or not the spray gun isjin operation. In the design shown in Figure 7, the device is formed with a tube 03 having perforations [4 in the lowerside, and this is connected to an air hose i5 having avalve l6 therein, and it will be noted that the valve i5 will control the flow of air to the member l3 that this may be turned on or'ofi, or so that a screen of any density may be provided. It will befunderstood that the valve [6 may be used with tlie type of shield shown 'in 40' Figures 3, 4, and 5, and also in the arrangement shown in Figure 6, or with a device of any type or description; v Q
In the design shown inFigure 8, the device is incorporated in a cap IT by providing a tube L8 around the visor l9, and connecting openings from the tube l8 through the' cap, or under the visor, so that airstreams will project downward 7 means, or in any manner.
and outward, as indicated by'thenumeral 2B.
The member it maybe mounted upon the cap, as shown, 'or maybe incorporatedtherein, and this may be connected to the air supply hose by any for supplying air under pressure.
Other changes may be made in the construction without departing from the spirit of the invention. One of which changes may be in the use of any other means for providing an air I screen over the face, anothermay be in the use of any otherneans for supporting or holding the shield, another may be in the use of other means for regulating the amount of air passing through the device, and still another may be in the use of other means forsupplying air to the device.
'I'lgie construction will be readily understood fronifthe foregoing description. In use the defice may be provided as shown and described, and it be noted that the shield may be placed upon the forehead and connected to any suitable means for supplying air under pressure, and as'the air is supplied, it will pass out of the small openings downward and over the face, as shown in Figures 1 and 2, thereby forming a continuous film, screen, or curtain which, being formed of air, will be transparent and which will supply a continuous amount of fresh air, thereby not only protecting the face, but maintaining anfabundance of clean fresh air which will' make it possible to spray with paint or any other product without the product-coming in contact with the face, which will also make it possible to;pass through dust,
smoke, gas fumes, orfthe like without any danger whatever, and also jwith an abundance of free .air' for breathing. "This device may also be used for many other purposes.
It win also be understood that a though this device is sho vn and described as hargingair,
it may also be used for any other fluid which may be gas or liquid.
Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent, isr l A- relatively small flat shield adapted to be placed over the forehead directly above the eyebrows having a continuous chamber therein with perforations extending through the lower edge of the'device and communicating with the chamber device is of a triangular shape and the chamber with the perforations also inclined and adapted to-eject the 'air in an outward downward direction, and a' connection at one end of the device adapted to extend therefrom to a means characterized in that the lower portion of the
US7371A 1935-02-20 1935-02-20 Fume and dust eliminator Expired - Lifetime US2032101A (en)

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Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444393A (en) * 1943-12-21 1948-06-29 Woo John Pyungok Protective mask
US2560215A (en) * 1945-11-01 1951-07-10 Christensen Marinus Protection mask against poisonous gases and dust
US2758304A (en) * 1954-03-15 1956-08-14 Mcgowan Hugh Football helmet
US3039110A (en) * 1958-01-07 1962-06-19 Vries Lazarus B De Anti-blinding device
US3482571A (en) * 1967-10-13 1969-12-09 Jack B Behrendt Surgical pillow having oxygen tube supporting means
US4369782A (en) * 1981-05-15 1983-01-25 Mcgee Terrill Eyewashing apparatus
US4752974A (en) * 1986-05-06 1988-06-28 Shigematsu Works Co., Ltd. Air-feed type dust protective helmet
US4865049A (en) * 1988-03-21 1989-09-12 Gatti John E Smoke eliminating shield for electrocautery surgery
US5002049A (en) * 1988-04-08 1991-03-26 Nederlandse Organisatie Voor Toegepast Natuur Portable smoke and gas dispeller
US5878742A (en) * 1997-09-11 1999-03-09 Figueredo; Joseph P. Airvisor delivery system
US5993428A (en) * 1996-10-05 1999-11-30 Hardge; Lawrence Head cover with eye spraying capability
US6645064B1 (en) 1998-04-30 2003-11-11 Bertil R. L. Werjefelt Smoke evacuation device
US20040031089A1 (en) * 2000-10-11 2004-02-19 Holmes Richard James Eye protection device
US6772762B2 (en) * 2000-05-24 2004-08-10 Gregory Hubert Piesinger Personal powered air filtration, sterilization, and conditioning system
US20050061316A1 (en) * 2002-04-08 2005-03-24 Joseph Manne Air curtain device with flexible shield
US20050114986A1 (en) * 2003-12-01 2005-06-02 Hobart James M. Paint particle deflector
US7036502B2 (en) 2002-04-08 2006-05-02 Joseph Manne Air curtain device
US20090055987A1 (en) * 2007-09-05 2009-03-05 Illinois Tool Works Inc. Airflow Headgear for a Welding Helmet
US20090222966A1 (en) * 2008-03-10 2009-09-10 Kelly Tippett Device and Method for Preventing the Obstruction of Eyewear
US20100146685A1 (en) * 2008-12-15 2010-06-17 Eye Savers, Inc. Forced-air protective apparatus
US20120240328A1 (en) * 2008-03-27 2012-09-27 Gary Dudley Valve for Emergency Eye Wash and Related Method
US20140026300A1 (en) * 2012-07-27 2014-01-30 Honeywell International, Inc. Airflow barrier system for protective eyewear
US20140102442A1 (en) * 2012-10-15 2014-04-17 Roger D. Wilson Facial accessory system
US20140259320A1 (en) * 2013-03-15 2014-09-18 Oscar Gonzalez Air safety protector for the facial area including the eyes, nose, mouth and ears
WO2014152594A1 (en) 2013-03-15 2014-09-25 Jb Scientific, Llc Taste inhibition through the use of an air flow
US20140360496A1 (en) * 2013-06-06 2014-12-11 Harvey Reese Personal health device
US9510632B2 (en) 2013-11-22 2016-12-06 Poma 22 Llc Hard hat with filtered, battery-operated air flow system and method
US20180042327A1 (en) * 2016-08-09 2018-02-15 Jared Taylor Hard hat having integral misting system
WO2019199500A1 (en) * 2018-04-12 2019-10-17 Kennedy Bobby Joe Airmepad
US10653197B2 (en) 2018-03-23 2020-05-19 Poma 22, Llc Hard hat with filtered, battery-operated air flow system and method
US10702721B2 (en) 2016-07-22 2020-07-07 Poma 22 Llc Hat and air filtration system
US10953248B2 (en) 2014-12-04 2021-03-23 ResMed Pty Ltd Wearable device for delivering air
US20210322620A1 (en) * 2020-04-17 2021-10-21 Otter Products, Llc Personal sanitizing device
FR3109735A1 (en) * 2020-04-29 2021-11-05 C&C Ingescience Personal protective mask for the face and respiratory tract with air curtain
US20210355963A1 (en) * 2020-05-18 2021-11-18 Printec Co., Ltd. Neckband fan
WO2022036386A1 (en) * 2020-08-20 2022-02-24 Iquip Group Pty Ltd Face air mask
US11318333B1 (en) 2021-04-17 2022-05-03 Christopher T. Ellerbrake Respiratory protection system
US20220264986A1 (en) * 2021-02-18 2022-08-25 John Walker Apparatus, methods and wearable devices for delivering cooled filtered air for breathing to users thereof
US11478602B2 (en) 2013-03-15 2022-10-25 Jb Scientific, Llc Taste inhibition through the use of an air flow
RU2794319C1 (en) * 2022-10-14 2023-04-17 Виталий Игоревич Баранюк Specific impact simulation tactical helmet
US11779676B2 (en) * 2020-04-17 2023-10-10 Otter Products, Llc Sanitizing device

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444393A (en) * 1943-12-21 1948-06-29 Woo John Pyungok Protective mask
US2560215A (en) * 1945-11-01 1951-07-10 Christensen Marinus Protection mask against poisonous gases and dust
US2758304A (en) * 1954-03-15 1956-08-14 Mcgowan Hugh Football helmet
US3039110A (en) * 1958-01-07 1962-06-19 Vries Lazarus B De Anti-blinding device
US3482571A (en) * 1967-10-13 1969-12-09 Jack B Behrendt Surgical pillow having oxygen tube supporting means
US4369782A (en) * 1981-05-15 1983-01-25 Mcgee Terrill Eyewashing apparatus
US4752974A (en) * 1986-05-06 1988-06-28 Shigematsu Works Co., Ltd. Air-feed type dust protective helmet
US4865049A (en) * 1988-03-21 1989-09-12 Gatti John E Smoke eliminating shield for electrocautery surgery
US5002049A (en) * 1988-04-08 1991-03-26 Nederlandse Organisatie Voor Toegepast Natuur Portable smoke and gas dispeller
US5993428A (en) * 1996-10-05 1999-11-30 Hardge; Lawrence Head cover with eye spraying capability
US5878742A (en) * 1997-09-11 1999-03-09 Figueredo; Joseph P. Airvisor delivery system
US6645064B1 (en) 1998-04-30 2003-11-11 Bertil R. L. Werjefelt Smoke evacuation device
US8573514B1 (en) 1998-04-30 2013-11-05 Bertil R. L. Werjefelt Smoke evacuation device
US6772762B2 (en) * 2000-05-24 2004-08-10 Gregory Hubert Piesinger Personal powered air filtration, sterilization, and conditioning system
US20040031089A1 (en) * 2000-10-11 2004-02-19 Holmes Richard James Eye protection device
US6836906B2 (en) * 2000-10-11 2005-01-04 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Eye protection device
US20050061316A1 (en) * 2002-04-08 2005-03-24 Joseph Manne Air curtain device with flexible shield
US7036502B2 (en) 2002-04-08 2006-05-02 Joseph Manne Air curtain device
US20050114986A1 (en) * 2003-12-01 2005-06-02 Hobart James M. Paint particle deflector
US20090055987A1 (en) * 2007-09-05 2009-03-05 Illinois Tool Works Inc. Airflow Headgear for a Welding Helmet
US20090222966A1 (en) * 2008-03-10 2009-09-10 Kelly Tippett Device and Method for Preventing the Obstruction of Eyewear
US20120240328A1 (en) * 2008-03-27 2012-09-27 Gary Dudley Valve for Emergency Eye Wash and Related Method
US8832872B2 (en) * 2008-03-27 2014-09-16 Gary Dudley Valve for emergency eye wash and related method
US20100146685A1 (en) * 2008-12-15 2010-06-17 Eye Savers, Inc. Forced-air protective apparatus
US20140026300A1 (en) * 2012-07-27 2014-01-30 Honeywell International, Inc. Airflow barrier system for protective eyewear
US20140102442A1 (en) * 2012-10-15 2014-04-17 Roger D. Wilson Facial accessory system
EP3669949A1 (en) 2013-03-15 2020-06-24 JB Scientific, LLC Taste inhibition through the use of an air flow
US20140259320A1 (en) * 2013-03-15 2014-09-18 Oscar Gonzalez Air safety protector for the facial area including the eyes, nose, mouth and ears
WO2014152594A1 (en) 2013-03-15 2014-09-25 Jb Scientific, Llc Taste inhibition through the use of an air flow
US11478602B2 (en) 2013-03-15 2022-10-25 Jb Scientific, Llc Taste inhibition through the use of an air flow
US10376668B2 (en) 2013-03-15 2019-08-13 Jb Scientific, Llc Taste inhibition through the use of an air flow
US20140360496A1 (en) * 2013-06-06 2014-12-11 Harvey Reese Personal health device
US9510632B2 (en) 2013-11-22 2016-12-06 Poma 22 Llc Hard hat with filtered, battery-operated air flow system and method
US9974350B2 (en) 2013-11-22 2018-05-22 Poma 22 Llc Hard hat
US10953248B2 (en) 2014-12-04 2021-03-23 ResMed Pty Ltd Wearable device for delivering air
US11679287B2 (en) 2014-12-04 2023-06-20 ResMed Pty Ltd Wearable device for delivering air
US10702721B2 (en) 2016-07-22 2020-07-07 Poma 22 Llc Hat and air filtration system
US20180042327A1 (en) * 2016-08-09 2018-02-15 Jared Taylor Hard hat having integral misting system
US10653197B2 (en) 2018-03-23 2020-05-19 Poma 22, Llc Hard hat with filtered, battery-operated air flow system and method
WO2019199500A1 (en) * 2018-04-12 2019-10-17 Kennedy Bobby Joe Airmepad
US20210322620A1 (en) * 2020-04-17 2021-10-21 Otter Products, Llc Personal sanitizing device
US11684691B2 (en) * 2020-04-17 2023-06-27 Otter Products, Llc Personal sanitizing device
US11779676B2 (en) * 2020-04-17 2023-10-10 Otter Products, Llc Sanitizing device
FR3109735A1 (en) * 2020-04-29 2021-11-05 C&C Ingescience Personal protective mask for the face and respiratory tract with air curtain
US20210355963A1 (en) * 2020-05-18 2021-11-18 Printec Co., Ltd. Neckband fan
WO2022036386A1 (en) * 2020-08-20 2022-02-24 Iquip Group Pty Ltd Face air mask
US20220264986A1 (en) * 2021-02-18 2022-08-25 John Walker Apparatus, methods and wearable devices for delivering cooled filtered air for breathing to users thereof
US11974627B2 (en) * 2021-02-18 2024-05-07 John Walker Apparatus, methods and wearable devices for delivering cooled filtered air for breathing to users thereof
US11318333B1 (en) 2021-04-17 2022-05-03 Christopher T. Ellerbrake Respiratory protection system
RU2794319C1 (en) * 2022-10-14 2023-04-17 Виталий Игоревич Баранюк Specific impact simulation tactical helmet

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