Disposable face mask

Claim 2

In a disposable conductive anesthetic circuit, the improvement which includes a face mask having an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said open bottom being conformable to the contours of a wearer''s face for preventing the passage of air between said base member and said wearer''s face, said base member being relatively soft, light in weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material and being sufficiently rigid to maintain its formation, said closed top wall having an aperture provided therein for fluid communication with said base member, and a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm.

Claim 3

The improvement of claim 1 wherein said polyurethane foam material is water-blown.

Claim 4

The improvement of claim 1 including a retaining ring encompassing said aperture, said retaining ring having headstrap-receiving hook means provided thereon.

Claim 5

The improvement of claim 1 including a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus disposed inside of said base member and said upper torus disposed on the outside of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm.

Claim 6

The improvement of claim 4 including a headstrap-retaining ring encompassing said grommet between said upper torus and said conductive film, said retaining ring including headstrap-receiving hook means and having an electrical resistance within a range of approximately 0-1 megohm.

Claim 7

The improvement of claim 4 including a two-piece fitting having an elbow portion and a Y-shaped portion, and said elbow portion including a first end removably engaged in close-fitting relationship in the core in said grommet and a second end engaged in one end of said Y-shaped portion in slidable rotation thereto.

Claim 8

The improvement of claim 6 wherein said base member is molded from a polyurethane foam activated by moisture at room temperature.

Claim 9

A disposable conductive anesthetic circuit, said circuit being connectable to an anesthetic machine and including the combination of a face mask including an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said base member being relatively soft, light in weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material and being sufficiently rigid to maintain its formation, said open bottom being conformable to the contours of a wearer''s face for preventing the passage of air between said base member and said wearer''s face, said closed top wall having an aperture provided therein, a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm, and conduit means having first ends connectable to said anesthetic machine and second ends connectable to said aperture.

Claim 10

A disposable conductive anesthetic circuit, said circuit being connectable to an anesthetic machine and including the combination of a face mask including an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said base member being relatively soft, light in weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material and being sufficiently rigid to maintain its formation, said open bottom being conformable to the contours of a wearer''s face for preventing the passage of air between said base member and said wearer''s face, said closed top wall having an aperture provided therein, a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm, and conduit means having first ends connectable to said anesthetic machine and second ends connectable to said aperture.

Claim 11

The disposable conductive anesthetic circuit of claim 8 wherein said polyurethane foam material is water-blown.

Claim 12

The disposable conductive anesthetic circuit of claim 8 wherein said conduit means includes: a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus disposed inside of said base member and said upper torus disposed on the outside of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm.

Claim 13

The disposable conductive anesthetic circuit of claim 10 wherein said conduit means further includes, a two-piece fitting having an elbow portion and a Y-shaped portion, said elbow portion having a first end removably engaged in close-fitting relationship in the core in said grommet and a second end engaged in one leg of said Y-shaped portion in slidable rotation thereto, and hose means connected to second and third legs on said Y-shaped portion.

Claim 14

The disposable conductive anesthetic circuit of claim 11 including a headstrap-retaining ring encompassing said grommet between said upper torus and said base member.

Claim 15

The disposable conductive anesthetic circuit of claim 12 including a breathing bag having an open neck portion communicating with said anesthetic machine.

Claim 16

A face mask for a conductive anesthetic circuit including conduit means for connecting said mask to an anesthetic machine, said mask including: an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said open bottom being conformable to the contours of wearer''face for preventing the passage of air between said base member and said wearer''face, said closed top wall having an aperture provided therein for receiving said conduit means, said base member being relatively soft, light-in-weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material and being sufficiently rigid to maintain its formation; and a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm.

Claim 17

A face mask for a conductive anesthetic circuit including conduit means for connecting said mask to an anesthetic machine, said mask including: an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said open bottom being conformable to the contours of wearer''face for preventing the passage of air between said base member and said wearer''face, said closed top wall having an aperture provided therein for receiving said conduit means, said base member being relatively soft, light-in-weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material and being sufficiently rigid to maintain its formation; and a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm.

Claim 18

The face mask of claim 14 wherein said base member is made from a polyurethane foam having a density of approximately 13 lbs. per cubic foot.

Claim 19

The face mask defined in claim 14 wherein said polyurethane foam material is water-blown.

Claim 20

The face mask of claim 14 including a headstrap-retaining ring encompassing said aperture, said ring including headstrap-receiving hook means.

Claim 21

The face mask defined in claim 14 wherein said conduit means includes: a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus being disposed inside of said base member and said upper torus being disposed on the upper side of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm.

Claim 22

The face mask of claim 18 including a headstrap-retaining ring encompassing said grommet between said upper torus and said conductive film, said retaining ring including headstrap-receiving hook means and having an electrical resistance within a range of approximately 0-1 megohm.

Claim 23

The face mask of claim 15 wherein said conduit means further includes: a two-piece fitting having an elbow portion and a Y-shaped portion, said elbow portion including a first end removably engaged in close-fitting relationship in the core in said grommet and a second end engaging one leg of said Y-shaped portion in slidable rotation thereto, and hose means engaging the other two legs of said Y-shaped portion.

Claim 24

The face mask of claim 20 wherein said base member is molded from a polyurethane foam which may be activated at room temperature and which has a density within the range of approximately 3-5 lbs. per cubic foot.

Claim 25

In a disposable conductive anesthetic circuit, the improvement which includes a face mask having: an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said open bottom being conformable to the contours of a wearer''s face for preventing the passage of air between said base member and said wearer''s face, said base members being relatively soft, light-in-weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material, and being sufficiently rigid to maintain its formation, said closed top wall having an aperture provided therein for fluid communication with said base member, a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm, a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus disposed inside of said base member and said upper torus disposed on the outside of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm, a two-piece fitting having an elbow portion and a Y-shaped portion, and said elbow portion including a first end removably engaged in close-fitting relationship in the core in said grommet and a second end engaged in one end of said Y-shaped portion in slidable rotation thereto.

Claim 26

In a disposable conductive anesthetic circuit, the improvement which includes a face mask having: an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said open bottom being conformable to the contours of a wearer''s face for preventing the passage of air between said base member and said wearer''s face, said base members being relatively soft, light-in-weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material, and being sufficiently rigid to maintain its formation, said closed top wall having an aperture provided therein for fluid communication with said base member, a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm, a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus disposed inside of said base member and said upper torus disposed on the outside of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm, a two-piece fitting having an elbow portion and a Y-shaped portion, and said elbow portion including a first end removably engaged in close-fitting relationship in the core in said grommet and a second end engaged in one end of said Y-shaped portion in slidable rotation thereto.

Claim 27

A disposable conductive anesthetic circuit, said circuit being connectable to an anesthetic machine and including the combination of: a face mask including an elastomeric cup-chaped base member having an encompassing side wall, a closed top wall and an open bottom, said base member being relatively soft, light-in-weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material, and being sufficiently rigid to maintain its formation, said open bottom being conformable to the contours of a wearer''s face for preventing the passage of air Between said base member and said wearer''s face, said closed top wall having an aperture provided therein, a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm, conduit means having first ends connectable to said anesthetic machine and second ends connectable to said aperture, said conduit means including a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus disposed inside of said base member and said upper torus disposed on the outside of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm, a two-piece fitting having an elbow portion and a Y-shaped portion, and said elbow portion having a first end removably engaged in close fitting relationship in the core in said grommet and a second end engaged in one leg of said Y-shaped portion, in slidable rotation thereto, and hose means being removably connectable to second and third legs on said Y-shaped portion.

Claim 28

A disposable conductive anesthetic circuit, said circuit being connectable to an anesthetic machine and including the combination of: a face mask including an elastomeric cup-chaped base member having an encompassing side wall, a closed top wall and an open bottom, said base member being relatively soft, light-in-weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material, and being sufficiently rigid to maintain its formation, said open bottom being conformable to the contours of a wearer''s face for preventing the passage of air Between said base member and said wearer''s face, said closed top wall having an aperture provided therein, a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm, conduit means having first ends connectable to said anesthetic machine and second ends connectable to said aperture, said conduit means including a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus disposed inside of said base member and said upper torus disposed on the outside of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm, a two-piece fitting having an elbow portion and a Y-shaped portion, and said elbow portion having a first end removably engaged in close fitting relationship in the core in said grommet and a second end engaged in one leg of said Y-shaped portion, in slidable rotation thereto, and hose means being removably connectable to second and third legs on said Y-shaped portion.

Claim 29

A face mask for a conductive anesthetic circuit including conduit means for connecting said mask to an anesthetic machine, said mask including: an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said open bottom being conformable to the contours of wearer''s face for preventing the passage of air between said base member and said wearer''s face, said base member being relatively soft, light-in-weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material and being sufficiently rigid to maintain its formation, said closed top wall having an aperture provided therein for receiving said conduit means, a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm, said conduit means including a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus being disposed inside of said base member and said upper torus being disposed on the upper side of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm, and a two-piece fitting having an elbow portion and a Y-shaped portion, said elbow portion including a first end removably engaged in close-fitting relationship in the core in said grommet and a second end engaging one leg of said Y-shaped portion, in slidable rotation thereto, and hose means removably engaging the other two legs of said Y-shaped portion.

Claim 30

A face mask for a conductive anesthetic circuit including conduit means for connecting said mask to an anesthetic machine, said mask including: an elastomeric cup-shaped base member having an encompassing side wall, a closed top wall and an open bottom, said open bottom being conformable to the contours of wearer''s face for preventing the passage of air between said base member and said wearer''s face, said base member being relatively soft, light-in-weight and having substantially all of its entire body formed of a one-piece deformable molding of polyurethane foam material and being sufficiently rigid to maintain its formation, said closed top wall having an aperture provided therein for receiving said conduit means, a conductive film covering at least a major portion of the outer surface area of said base member, said conductive film having an electrical resistance within a range of approximately 0-1 megohm, said conduit means including a grommet having a hollow, cylindrical core encompassed by a lower torus and an upper torus spaced from said lower torus a distance approximately equal to the thickness of said base member adjacent said aperture, said grommet including means associated therewith for snap-fitting into position in said aperture with said lower torus being disposed inside of said base member and said upper torus being disposed on the upper side of said base member, said grommet having an electrical resistance within a range of approximately 0-1 megohm, and a two-piece fitting having an elbow portion and a Y-shaped portion, said elbow portion including a first end removably engaged in close-fitting relationship in the core in said grommet and a second end engaging one leg of said Y-shaped portion, in slidable rotation thereto, and hose means removably engaging the other two legs of said Y-shaped portion.