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Publication numberUS3683907 A
Publication typeGrant
Publication dateAug 15, 1972
Filing dateJul 20, 1970
Priority dateJul 20, 1970
Also published asDE2135928A1, DE2135928B2, DE2135928C3
Publication numberUS 3683907 A, US 3683907A, US-A-3683907, US3683907 A, US3683907A
InventorsCotabish Harry N
Original AssigneeMine Safety Appliances Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fresh air respirator
US 3683907 A
Abstract
A cup contains a porous member that is spaced from its bottom wall to form an air chamber behind the porous member. The cup has an opening communicating with the chamber and there is means for supporting the cup in front of a person's nose and mouth with the porous member facing them. A stream of air is conducted to the cup opening to maintain the chamber full of air under pressure so that air will diffuse through the porous member and issue therefrom to provide fresh air around the nose and mouth.
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Description  (OCR text may contain errors)

United States Patent [151 3,683,907 [4 Aug. 15,1972

Cotabish [54] FRESH AIR RESPIRATOR [72] Inventor: Harry N. Cotabish, Allison Park, Pa.

[73] Assignee: Mine Safety Appliances Company,

Pittsburgh, Pa.

[22] Filed: July 20, 1970 [21] Appl. No.: 56,413

[52] US. Cl .Q ..128/l45 [51] Int. Cl. ..A61m 16/00 [58] Field of Search ..128/l40, 146.7, 142.6,141, 128/145, 145.5, 185

[56] References Cited UNITED STATES PATENTS 2,332,662 10/1943 Nathanson .....I28/l42.6 X

3,101,709 8/1963 Gruenewaelder ..l28/ 146.2

3,040,741 6/1962 Carolan ..l28/I46.7

2,376,871 5/1945 Fink ..128/146.7

FOREIGN PATENTS OR APPLICATIONS 324,909 l/1930 Great Britain 128/1426 Primary Examiner-Richard A. Gaudet Assistant Examiner-G. F. Dunne Attorney-Brown, Murray, Flick & Peckham [57] ABSTRACT A cup contains a porous member that is spaced from its bottom wall to form an air chamber behind the porous member. The cup has an opening communicating with the chamber and there is means for supporting the cup in front of a persons nose and mouth with the porous member facing them. A stream of air is conducted to the cup opening to maintain the chamber full of air under pressure so that air will diffuse through the porous member and issue therefrom to provide fresh air around the nose and mouth.

4 Claims, 3 Drawing Figures and actually draws it in toward the nose and mouth so that it is inhaled in spite of the air curtain.

It is among the objects of this invention to provide a respirator which is simple in construction and operation, which is fully adjustable, and which bathes a persons nose and mouth area infresh air without entraining surrounding dust orother contaminants.

The preferred embodiment of the invention is illustrated in the accompanying drawings, in which FIG. 1 is a side view of a respirator in operative posi tron;

- FIG. 2 is an enlarged view, partly in section, taken on the line [1-11 of FIG. 1; and i V FIG. 3 is an enlarged view taken on the line III-III of FIG. 1.

Referring to the drawings, a shallow cup of any suitable material has a bottom wall 1 and an upstanding side wall 2. Inside the cup there is a porous member 3 that preferably is a porous block fitting tightly against the side wall of the cup. Various materials may be used, one of the best being an open cell foamed plastic which is light and inexpensive. The porous member does not fill the cup but, as shown in FIG. 2, is spaced from the bottom wall to form an air chamber 4 behind or below the porous member. To supply this chamber with air, a wall of the cup, preferably the bottom wall,.is provided with an opening 5 that is connected with a flexiblehose 6 leading fromasuitable source of air under pressure. The air willmaintain the chamber in the cup full of air under pressure, and that air will diffuse through the porous member and issue from it in a multiplicity of tiny streams having low velocity.

Since the air issuing from the porous member is to be directed against the nose and mouth of a person, provision is made for supporting the cup in a position suitable for that purpose. Preferably, the supporting means is fastened to headgear, such as a miners helmet 8 or the like. The support may be a single arm, although two arms 9 are better. The arms are fastened by screws 10 and thumb nuts 11 to the opposite sides of the helmet. From that point the arms extend forward and downward across the cheek and then inward in front of the chin. The parallel lower end portions of these arms are provided with longitudinal slots 12 or, what amounts to the same thing,a plurality of longitudinally spaced openings. To fasten the cup to the arms, opposite sides of the cup are provided with aligned trunnions 13 that are screw threaded. These trunnions extend through the slots in the arms. Spacers 14 may be mounted on the trunnions between the cup and the arms, and thumb nuts 15 are screwed onto the outer be connected to one of the arms by suitable clips 16 and extend around to a fitting 17 on the back of the helmet to which another hose 18 is detachably connected th f f s g ili t e ug i s t'ilfi djfliiabie; up and down, forward and backward, and tilting, so the user can place it in a position where the air issuing from the porous member will completely cover his nose and mouth. Since the cup is close to the face and the issuing air is diffused and haslow velocity, it does not have an aspirating or entraining effect that would pull in surrounding dust or smoke for the user to inhale.

According to the provisions of the patent statutes, I have explained the principle of my invention and have illustrated and described what I now consider to represent its best embodiment. However, I desire to have it understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

1. A fresh air respirator comprising a cup having a bottom wall surrounded by a side wall, the side of the cup opposite said bottom wall being open, a porous member mounted in the cup and spaced from its bottom wall to form an air chamber behind said member, a wall of the cup being provided with an opening communicating with said chamber, arm means connectable to a headgear for supporting the cup spaced in front of a persons nose and mouth with the exposed. side of the porous member facing them and open to the atmosphere, and means for continually delivering a stream of air to said cup opening to maintain said chamber full of air under pressure, whereby air will diffuse through the porous member and issue therefrom directly into the atmosphere.

2. A respirator according to claim 1, in which said block is an open cell foamed plastic.

3. A respirator according to claim 1, in which said supporting means includes an arm provided at one end opposite sides of the cup through said slots, said trunnions being rotatable in the slots and slidable lengthwise thereof, and nuts screwed on the outer ends of the trunnions and against said arms to lock the cup in a desired position relative to the arms.

* l I i

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2332662 *Sep 21, 1942Oct 26, 1943Max NathansonGas mask
US2376871 *May 24, 1941May 29, 1945Rudolph FinkRespirator mask
US3040741 *Dec 15, 1958Jun 26, 1962Puritan Compressed Gas CorpQuick donning harness for oxygen masks
US3101709 *Apr 6, 1959Aug 27, 1963Lou A GruenewaelderFace masks
GB324909A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3921223 *Jun 12, 1974Nov 25, 1975David V HoyeckiAir shield for welders and other craftsmen exposed to noxious fumes
US4282869 *Jun 22, 1979Aug 11, 1981Montreal General Hospital Research Inst.Apparatus for oxygen treatment
US4593688 *May 30, 1984Jun 10, 1986Payton Hugh WApparatus for the delivery of oxygen or the like
US5048516 *Jul 14, 1988Sep 17, 1991Soederberg StigRespiratory mask
US5139017 *Jun 3, 1991Aug 18, 1992Mccloud Russell DBicycle helmet having air filtering and breathing means
US5267557 *Aug 17, 1992Dec 7, 1993Her Mou LinNose mask with a filtering device
US5477852 *Nov 19, 1993Dec 26, 1995Airways Ltd., Inc.Device for treatment of sleep apnea
US5538000 *Feb 6, 1995Jul 23, 1996Hans Rudolph, Inc.Airflow delivery system
US5657752 *Mar 28, 1996Aug 19, 1997Airways AssociatesNasal positive airway pressure mask and method
US5687715 *Dec 22, 1995Nov 18, 1997Airways Ltd IncNasal positive airway pressure apparatus and method
US6435184 *Sep 1, 2000Aug 20, 2002Tien Lu HoGas mask structure
US6450166May 17, 2000Sep 17, 2002Southmedic IncorporatedPatient oxygen delivery system
US6595207Sep 11, 2000Jul 22, 2003Southmedic IncorporatedOxygen diffuser for patient oxygen delivery system
US6619288 *May 29, 2001Sep 16, 2003Deka Products Limited PartnershipBreathing mask with incomplete headband
US6675796 *Oct 12, 2001Jan 13, 2004Southmedic IncorporatedLightweight oxygen delivery device for patients
US6691706 *Jan 2, 2002Feb 17, 2004Thomas Harrison IvesPersonal humidifier
US6886559 *May 24, 2002May 3, 2005Be Intellectual Property, Inc.Multi-phase headset for pilots
US7036502 *Apr 7, 2003May 2, 2006Joseph ManneAir curtain device
US7146976 *Feb 3, 2003Dec 12, 2006Mckown Joseph RNasal cannula retainer
US7178528 *Mar 1, 2005Feb 20, 2007Lau Greg YHeadgear for noninvasive ventilation interface
US8042540May 4, 2006Oct 25, 2011Southmedic IncorporatedPatient oxygen delivery mask
US20080196719 *Feb 16, 2007Aug 21, 2008Wasatch Manufacturing, LlcSupplemental air diffusion devices, kits and methods
US20110186045 *Jan 27, 2011Aug 4, 2011Lenard EricksonBreathing Apparatus
EP0941136A1 *Sep 14, 1998Sep 15, 1999Airsep CorporationNon-contact gas dispenser and apparatus for use therewith
WO2002056966A1 *Jan 16, 2002Jul 25, 2002De Luca DavideIndividual portable air purifier
WO2005097018A1Feb 28, 2005Oct 20, 2005Perez PhilippeSmall respiratory device for distributing pressurised air to a respiratory tract
WO2007028877A2 *Sep 1, 2006Mar 15, 2007Philippe PerezPortable gas dispensing device
Classifications
U.S. Classification128/200.28, 128/201.22
International ClassificationA62B7/00, A62B18/00, A62B7/12
Cooperative ClassificationA62B7/12, A62B18/003
European ClassificationA62B18/00B, A62B7/12