Scavenging valve device

A scavenging valve for anesthesia gas release in pediatric anesthesia apparatus is of generally conical configuration and has an axial bore extending therethrough from an open base to an open apex with a plurality of longitudinally extending fins around the bore in the valve. The scavenging valve has a plurality of external fin-like projections at its base. Each of the fin-like projections has a hole formed therethrough for facilitating releasable affixing of the scavenging valve to an operating table to prevent shifting of the valve. A control valve comprises a pair of nipples each of generally conical configuration in base to base relation with an axial bore extending therethrough from one open apex end to the other. The control valve has a radially extending hole formed therethrough at the juncture of the bases of the nipples. The bore tapers down to each of the apices from the bases. The control valve couples an anesthesia bag to the scavenging valve and has a gas flow control and shutoff plate pivotally mounted in the bore thereof in the area of the bases of the control valve. A manually operable control member is provided outside the control valve. A pin extends through the hole through the control valve and couples the control member to the valve plate in a manner whereby the valve plate rotates in correspondence with rotation of the control member.

BACKGROUND OF THE INVENTION 
The present invention relates to a scavenging valve device. More 
particularly, the invention relates to a scavenging valve device for 
anesthesia gas release in pediatric anesthesia apparatus having an 
anesthesia bag. 
Objects of the invention are to provide a scavenging valve device of simple 
structure, which is inexpensive in manufacture, used with facility and 
convenience, completely safe in operation, and functions efficiently, 
effectively and reliably to permit the securing of the valve to an 
operating table during a surgical procedure to eliminate shifting around 
of such valve.

DETAILED DESCRIPTION OF THE INVENTION 
The scavenging valve device of the invention is for anesthesia gas release 
in pediatric anesthesia apparatus of the type shown in FIG. 1 having an 
anesthesia bag 1 which contains anesthesia in gas form. 
The scavenging valve device of the invention comprises a scavenging valve 2 
(FIGS. 1 to 3) of generally conical configuration having an axial bore 3 
extending therethrough from an open base 4 to an open apex 5 with a 
plurality of longitudinally extending fins 6, 7, 8, and so on (FIGS. 2 and 
3), around the bore in the valve. 
The scavenging valve 2 has a plurality of external fin-like projections 9, 
10, 11 and 12 at its base, all of which are shown in FIG. 3 and the 
projections 10 and 12 are shown in FIG. 2. Each of the fin-like 
projections 9 to 12 has a hole formed therethrough for facilitating 
releasable affixing of the scavenging valve 2 to an operating table to 
prevent shifting of said valve. The holes 13 and 14 of the fin-like 
projections 10 and 12 respectively, are shown in FIG. 2. This enables a 
chain, wire, cord, or the like, to be passed through the holes of the 
fin-like projections to secure the scavenging valve 2 to an operating 
table during a surgical procedure thereby preventing shifting of the valve 
and thus preventing leakage of anesthesia gas and the resultant serious 
consequences of its affecting of the surgeons and doctors in attendance. 
The scavenging valve device of the invention further comprises a control 
valve 15 (FIGS. 1, 2 and 4) comprising a pair of nipples 16 and 17 (FIGS. 
2 and 4). Each of the nipples 16 and 17 is of generally conical 
configuration in base to base relation. An axial bore 18 (FIG. 2) extends 
through the control valve 15 from one open apex end 19 to the other open 
apex end 20 (FIGS. 2 and 4). 
The control valve 15 has a radially extending hole (not shown in the views 
of the FIGS.) formed therethrough at the juncture of the bases of the 
nipples 16 and 17. The bore 18 tapers down to each of the apices 19 and 20 
from the bases, as shown in FIG. 2. 
The control valve 15 couples the anesthesia bag 1 to the scavenging valve 
2, as shown in FIG. 1, and has a gas flow control and shutoff valve plate 
21 (FIGS. 2 and 4) pivotally mounted in the bore 18 thereof in the area of 
the bases of the control valve. A manually operable control member 22 
(FIGS. 1 and 4) is provided outside the control valve 15. A pin 23 (FIG. 
2) extends through the hole through the control valve 15 and couples the 
control member 22 to the valve plate 21 in a manner whereby the valve 
plate rotates in correspondence with rotation of the control member. 
The control member 22 preferably comprises a knurled wheel. 
While the invention has been described by means of a specific example and 
in a specific embodiment, I do not wish to be limited thereto, for obvious 
modifications will occur to those skilled in the art without departing 
from the spirit and scope of the invention.