A mouth-to-mask resuscitator which can be carried in a person's pocket consisting of an oronasal mask and a check valve which is inserted into the mask and allows a person to administer artificial ventilation to fill the victim's lung with air and to allow the victim to exhale air through an exit in the valve assembly away from the person administering the resuscitation. The mask is foldable into itself to form a cavity for storing the check valve which has inspiratory and exhalation air flow back pressures meeting ISO standards.

BACKGROUND OF THE INVENTION 
To revive a non-breathing person, mouth-to-mouth resuscitation is often 
employed in an emergency situation. In order to reduce the risk of the 
transmission of communicable diseases during the resuscitation process, 
the mouth-to-mask resuscitator of the present invention has been devised. 
SUMMARY OF THE INVENTION 
The mouth-to-mask resuscitator of the present invention comprises, 
essentially, an oronasal mask constructed and arranged to seal around the 
mouth and nose of a non-breathing person, and a non-rebreathing or check 
valve assembly insertable into the mask, whereby a person can administer 
artificial ventilation by blowing into the valve and mask assembly to fill 
the non-breathing person's or victim's lungs with air, and to allow the 
victim to exhale air through an exit in the valve away from the person. 
The oronasal mask is foldable, and the removable check valve is placed 
within the folded mask for storage.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to the drawing and more particularly to FIG. 1, the mouth-to-mask 
resuscitator 1 of the present invention comprises an oronasal mask 2, and 
a non-rebreathing or check valve 3 insertable into the mask 2. The mask 2 
and valve 3 are shown in FIG. 1 in the stored position, and which can be 
placed in a suitable container, not shown, and carried in one's pocket. To 
accomplish this, the mask 2 includes a dome portion 4 made of flexible 
material integral with a hollow, resilient, annular base portion 5. The 
flexible dome portion 4 can be folded into itself to form a cavity 6 for 
receiving the valve 3 laying sideways therein. To mount the valve 3 in the 
operative position on the mask 2, as shown in FIG. 3, the dome portion 4 
is pushed outwardly to extend above the base portion 5 and a tubular 
portion 7 of the valve 3 is inserted into an opening in the mask 2 and 
frictionally held therein by a peripheral wall portion 8 extending around 
the opening. 
The valve 3 comprises an offset tubular inlet 9 having a stepped base 
portion 10 formed with a depending, annular, knife edge 11 providing a 
seat for a resilient valve disc 12. The base portion 10 of the inlet tube 
9 is integrally connected to a housing 13 having a cross-sectional 
configuration corresponding to the base portion 10. The tubular portion 7 
is offset on the housing 10 in a manner similar to the tubular inlet 9 on 
the base portion 10, and a through bore 14 is provided in the housing 13 
communicating the interior of the housing 13 with the atmosphere. The top 
peripheral edge 15 of the bore 14 is inclined and provides a seat for the 
resilient valve disc 12 which is secured at one point along its periphery 
between the base portion 10 and housing 13 by the depending knife edge 11 
pressing the peripheral portion of the disc 12 against the top surface 16 
of a vertically extending post 17 integral with the outer wall surface of 
the bore 14. Because the diameter of the disc valve 12 is close to the 
diameter of the peripheral edge 15, a diametrically extending rib 18 is 
provided in the bore 14 to prevent the pressure of exhaled air of the 
operator from pushing the disc valve 12 into the bore 14. The portion of 
the peripheral edge 15 and the outer portion 19 of the rib 18 adjacent the 
post 17 is higher than the top surface 16 of the post 17, to thereby form 
a hinge for biasing the disc valve 12 against the annular knife edge 11. 
In use, the mask 2 and associated valve 3 are placed on the victim, as 
shown in FIG. 3, so that the annular base portion 5 of the mask seals the 
resuscitator around nose 20 and mouth 21 of the victim, and the tubular 
portion 7 of the valve is inserted into the opening in the mask. The 
operator or person administering the artificial ventilation blows through 
tubular inlet 9 to move the valve disc 12 from the knife edge 11, as shown 
in FIG. 2, to the peripheral edge 15, to thereby establish communication 
between inlet 9 and tubular portion 7, whereby air is forced into the 
victim's lungs. When the operator stops blowing, the disc valve 12 returns 
to the original position against the knife edge 11, as shown in FIG. 3, 
whereby the victim's exhaled air flows through the tubular portion 7 and 
bore 14 to the atmosphere. 
It is imperative that a resuscitator be designed to allow the least amount 
of air flow resistance both for inspiratory flow, FIG. 2, and exhalation, 
FIG. 3. The maximum resistance set by ISO draft standard ISO/DIS 8382 is 5 
cm/H.sub.2 O for exhalation and 5 cm/H.sub.2 O for inspiratory at 50 
L/min. flow. It will be appreciated by those skilled in the art that these 
standards are achieved by the construction and arrangement of the 
mouth-to-mask resuscitator of the present invention. To accomplish this, 
the valve inlet 9, tubular portion 7, and bore 14 are designed to have the 
largest openings possible, while keeping the overall size of the valve to 
a minimum, and the resilient disc 12 is dimensioned to the extent of the 
peripheral edge 15 to allow for the least amount of air flow resistance 
into and out of the valve. 
It is to be understood that the form of the invention herewith shown and 
described is to be taken as a preferred example of the same, and that 
various changes in the shape, size and arrangement of parts may be 
resorted to, without departing from the spirit of the invention or scope 
of the subjoined claims.