Anesthetic agent positioning and conduit means are provided for anesthesia evaporators to position prepackaged, anesthetic agents, with respect to the anesthesia evaporator and to facilitate movement of the anesthetic agent from its package when so positioned and to conduct the anesthetic agent to a chamber within the evaporator for mixing with carrier gases and passage from the evaporator for anesthesia uses. In one embodiment the anesthetic agent is packaged in a bottle with an externally threaded neck and sealed by a membrane which, upon the bottle being threaded into a well carried by the evaporator, is severed by a spear-headed cutter disposed in the well that enables the anesthetic agent to pass from the bottle to the chamber. Fluid introduction means is provided in a modification to move air into the bottle and facilitate passage of anesthetic agent therefrom. In another embodiment the anesthetic agent is in a rectangular foil wrapped package that is received in a package receiver carried by the evaporator. Piercing members pierce the foil at several locations to permit the anesthetic agent to flow from the package and in one embodiment to also permit air to enter the package to facilitate such flow. A conduct conducts the anesthetic agent to the chamber in the evaporator. In a third embodiment a door is provided to permit entry into the anesthetic agent chamber and the anesthetic agent is in a cryogenically frozen block which when placed in the chamber of the evaporator sublimes on its own due to ambient temperatures or upon application of heat thereabout. In another embodiment the pre-packaged anesthetic agent is disposed at an angle of twenty degrees to the vertical; and in yet another embodiment the pre-packaged anesthetic agent container is connected to the evaporator is a first disposition and then moved to another disposition to permit flow of the anesthetic agent to the evaporator.

BACKGROUND OF THE INVENTION-FIELD OF APPLICATION 
This invention relates to anesthesia evaporators or vaporizers; and more 
particularly to such anesthesia vaporizers or vaporators which facilitate 
the mixing of anesthetic agents with carrier gases to facilitate delivery 
of anesthesia in appropriate anesthetizing proportions to patients. 
BACKGROUND OF THE INVENTION-DESCRIPTION OF THE PRIOR ART 
The delivery of anesthesia to a patient, to anesthetize the patient to 
facilitate performing an operation on the patient or to facilitate 
performing a medical procedure on the patient, has and can be accomplished 
in many ways and with many types of apparatus utilized for such purposes. 
Devices for presentation to a person of a substance, usually a gas, to be 
inhaled have existed for some time as shown, by way of example in U.S. 
Pat. No. 1,071,389 granted on Aug. 26, 1913 to J. W. Blosser for 
"Vaporizer And Inhaler" and in U.S. Pat. No. 1,304,339 granted on May 20, 
1919 to R. R. McGregor for "Eucathol Inspirator." However, such devices 
merely pass air over a medicinal substance, with and without the 
application of heat respectively, and are not suitable to mix carrier 
gases and anesthetizing agents for delivery of anesthesia to a patient in 
an operating room. 
Some early devices for providing anesthesia to a patient are shown and 
described in U.S. Pat. No. 802,339 granted on Oct. 17, 1905 to A. De Trey 
for "Inhaler" in U.S. Pat. No. 968,306 granted on Aug. 23, 1910 to W. J. 
Wunderlich for "Apparatus For Administering Anesthesia" and in U.S. Pat. 
No. 1,203,391 granted on Oct. 31, 1916 to P. S. O'Donnell for "Apparatus 
For Administering Gases And The Like Medicinal Agents." These devices are 
all substantially portable in construction and are also unsuitable for use 
in operating rooms and under conditions required by today's medical 
practice when performing operations and medical procedures. De Trey, for 
example, utilizes a glass capsule of anesthetic which must be broken in 
use and which further does not provide for safe disposition of the broken 
glass fragments which are inherently dangerous. O'Donnell also utilizes a 
capsule for the anesthetic and requires that capsule be placed within a 
holder that must be screwed together and constructed strong enough to 
function as a handle; which construction would require the loss of 
valuable time in an operating atmosphere and necessitate relatively fine 
hand and finger movement in the rush and tense environment of a medical 
operation or procedure. Wunderlich requires special disposition of an 
anesthetic agent receptacle with a lead cap through which a threaded tube 
must be inserted to acquire the anesthetic agent; or the use of a glass 
anesthetic agent capsule whose end must be broken in use. As stated 
earlier neither inherently dangerous glass fragments or screwing a tube 
into a lead cap are suitable for today's operating environments. 
Other anesthesia administering devices are shown and described in U.S. Pat. 
No. 2,641,253 granted on Jun. 9, 1953 to A. E. Engelder for "Anesthesia 
Apparatus" and in U.S. Pat. No. 2,944,547 granted on Jul. 12, 1960 to F. 
A. Ziherl et al for "Portable Anesthesia Machine, Oxygen Inhalator And 
Resuscitator." However, Engelder's drip mask and Ziherl et al's portable 
device are both unsuitable for anesthesia delivery devices for today's 
operating room requirements. Similarly, the device shown and described in 
U.S. Pat. No. 3,123,071 granted on Mar. 3, 1964 to J. A. Felts FOR 
"Anesthetic Vaporizer" is unsuitable for operating room use because it 
only accepts liquid anesthetic from a syringe in syringe quantities; while 
devices, such as those shown and described in U.S. Pat. No. 4,770,168 
granted on Sep. 13, 1988 to T. Rusz for "Electrically Controllable 
Anesthesia Vaporizer," are relatively complex and further add to the mass 
confusion and tense atmosphere in the operating room. 
Other available anesthesia vaporizers, such as the "Drager Vapor 19" are 
shown and described at 1 Anesthesia 130 by R. D. Miller (Churchill 
Livingston, Inc., 1981) and by a vaporizer marketed under the name 
ENFLURATEC by Cyprane Ltd and a vaporizer for ethrane anesthetic marketed 
by Ohio Medical Products a division of Airco Inc of Madison Wis. But these 
units require the use of special tubes having first ends keyed to inlet 
ports of such vaporizers and second ends that are inserted into anesthetic 
agent containers and which are attached to such containers by internally 
threaded caps; or, alternatively, an internally threaded well to receive a 
bottle of anesthesia with its neck externally threaded. Such constructions 
are also awkward to use in the fast pace and crowded situations in an 
operating room because opening and dumping a bottle of anesthesia into a 
well while threading threads on the neck of the bottle into a receiver 
requires some dexterity and finite time and often results in spilling of 
the anesthetic agent and contamination of the air in the operating room 
that the operating room personnel must breath. On the other hand, finding 
a particular one or ones of a number of keyed tubes for fitting into and 
thereafter effecting the fit also requires dexterity in a relatively 
anxious environment. More importantly such action requires the 
availability of the right tube at the right time and that it be properly 
inserted in the right inlet receptacle. Furthermore, threading the cap 
provided at the other end of such tubes onto the threads of such 
anesthetic bottles also produces unacceptable spillage of anesthetic into 
the air within the operating room that the operating room personnel must 
breath. 
SUMMARY OF THE INVENTION 
It is therefore an object of this invention to provide new and novel 
anesthesia evaporators. 
It is another object of this invention to provide new and novel mechanisms 
or devices to facilitate entry of anesthetic agents into anesthesia 
evaporators. 
It is still another object of this invention to provide new and novel 
mechanisms or devices to introduce anesthetic agents, in premeasured 
packages, into anesthetic evaporators. 
It is a further object of this invention to provide new and novel 
mechanisms or devices which accept pre-packaged anesthetic agents wherein 
the package includes threaded elements which coact with threaded elements 
located on an anesthetic evaporator to seat the package of anesthetic 
agent prior to release of the anesthetic agent into the anesthetic 
evaporator. 
It is yet a further object of this invention to provide new and novel 
mechanisms or devices which accept pre-packaged anesthetic agents wherein 
the package includes threaded elements which coact with threaded elements 
located on an anesthetic evaporator to seat the package of anesthetic 
agent and which disposes the anesthetic agent package at a predetermined 
angle to stabilize pressures. 
It is still a further object of this invention to provide new and novel 
mechanisms or devices which accept pre-packaged anesthetic agents wherein 
the package includes threaded elements which coact with threaded elements 
located on an anesthetic evaporator such that the anesthetic agent package 
can be threadably connected to the evaporator in a first disposition of 
the anesthetic agent package and that the anesthetic agent package can 
thereafter be moved to a second disposition for passage of the anesthetic 
agent into the evaporator. 
It is yet still a further object of this invention to provide new and novel 
mechanisms or devices to introduce prepackaged anesthetic agents into 
anesthetic evaporators wherein the anesthetic agent is prepackaged in foil 
that is opened when positioned for coaction with the anesthetic evaporator 
to facilitate introduction of the anesthetic agent into the anesthetic 
evaporator. 
It is yet still another object of this invention to provide new and novel 
mechanisms or devices to introduce prepackaged anesthetic agents into 
anesthetic evaporators wherein the anesthetic agents are cryogenically 
frozen and introduced in that state into the anesthetic evaporator and 
thereafter sublime to release the anesthetic agent.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
With reference to FIG. 1 there is generally shown at 10 an anesthesia 
evaporator including a body 12 which while schematically shown to be 
generally rectangular in cross section might just as well be square, round 
or any other convenient configuration. An inlet tube 14 and an outlet tube 
16 extend from body 12 proximate its top 20. Tubes 14, 16 conduct carrier 
gases, such as oxygen or nitrous-oxide mixture, to and through vaporizer 
10 and into proximity to pick-up and mix with an anaesthetic agent such as 
enflurane, halothane, isoflurane and any other commonly now or hereinafter 
used anesthetic agents. The mixing of the anesthetic agent and carrier gas 
is accomplished in a substantially conventional manner with the amount of 
anaesthetic agent to be picked up or mixed with the carrier gas controlled 
by a control knob 30 disposed on top of top 20 of body 12. A pointer 32 
coacts with a scale 34 to indicate the percent of the mixture. An 
anaesthetic agent 40, generally in liquid form is disposed in an 
anaesthetic agent chamber 42 (FIGS. 1 and 2) positioned within body 12 
with the interaction between anaesthetic agent 40 and the carrier gases 
taking place in a substantially conventional manner. 
Anesthetic agent 40 travels into chamber 42 by way of a tube 50 extending 
between chamber 42 and an anaesthetic agent well 52 disposed at the base 
54 of a depression 56 formed in the face 58 of body 12. Well 52 includes a 
set of internal screw threads 60 and a blade-like spear-head membrane 
cutter 62 extending up from a base 64 of well 52. An air tube 66 (FIG. 2) 
extends up through spear-head 62 and through tube 50 and has its other end 
(not shown) open to atmosphere. 
Threads 60 are sized, shaped and configured to receive and coact with 
mating threads 70 (FIG. 2) on a pre-packaged anesthetic agent 72 utilized 
with and for evaporator 10. In this instance anesthetic agent 72 is in the 
form of a liquid 74 and is of the type generally and conventionally used 
as an anesthetic agent. Agent 72 is pre-packaged into a container in the 
form of a bottle 80 with an agent sealing membrane 82 disposed inside neck 
84 of bottle 80 at approximately the level of anesthetic agent 72 therein 
but below the level of the tip 86 of neck 84 of bottle 80. 
The relationship of agent sealing membrane 82 to tip 86 of neck 84 of 
bottle 80 is such that threads 70 of bottle 80 may be mated to and coact 
with threads 60 of well 52 until the respective threads 60, 70 are almost 
fully mated and tip 86 of neck 84 of bottle 80 almost fully seated in well 
52. Further threading of threads 60, 70 to fully seat bottle in well 52 
causes spear-head membrane cutter 62 to sever membrane 82 and permit 
anaesthetic agent 72 to spill into well 52, travel through tube 50, and 
into anaesthetic agent chamber 42 of evaporator 10. 
Air tube 66 permits air to enter bottle 80 through spear-head 62 to 
facilitate passage of anaesthetic agent 72 from bottle 80. 
While bottle 80 has been shown to be round it may just as well be any other 
convenient configuration as long as its neck is sized to facilitate 
threading into well 52. Furthermore, while neck 84 of bottle 80 and well 
52 are respectively provided with continuous screw threads they may just 
as easily be provided with discontinuous threads or for that matter any 
other mating-type positioning and securing members as long as the package 
for the anaesthetic agent is well received and positioned within well 52 
before the membrane releasing the anaesthetic agent is severed. Bottle or 
package 80 may be provided with an internally threaded cap to seal neck 84 
and/or with another membrane at or proximate tip 86 of bottle 84 to 
further seal neck 84 and secure the inside thereof against contamination. 
Should it be desired to have a particular anesthesia evaporator 10 be 
specific for a particular specific anesthetic agent such that is 
accomplished by forming threads 60 in well 52 and threads 70 on neck 84 of 
anaesthetic package 80 of a peculiar size, shape and configuration so that 
they only mate with each other. As such the threads on a package of 
anesthetic agent not specific for use with evaporator 10 will not be 
received by threads 60 in well 52 and the non-specific anesthetic agent 
will not be able to be used with that particular evaporator 10. 
In FIG. 3 there is generally shown, in schematic, an anesthesia evaporator 
or vaporator 110 which includes an anesthetic agent chamber 120 disposed 
substantially similar to chamber 42 of evaporator 10 of FIGS. 1 and 2 and 
for the same purposes. A tube 122 has one of its ends disposed in chamber 
120 and the other of its ends connected to a well 124 disposed, like well 
50 of evaporator 10 of FIGS. 1 and 2, on a front wall of evaporator 10, to 
direct anesthetic agent from well 124 to chamber 120. Internal threads 130 
are formed within well 124 of a size, configuration and disposition to 
coact with mating threads 140 formed on the outside of a neck 142 of an 
anesthetic agent package, in the form of a bottle 144, that is filled with 
an anesthetic agent 150. The coaction between threads 140 of bottle 144 
and threads 130 of well 124 is the same as that described for similar 
elements of the FIG. 1 embodiment such that a spear-head membrane cutter 
160, disposed within well 124, severs membrane 162 disposed within bottle 
144 and permits anesthetic agent 150 to flow into well 124 and therefrom 
through tube 122 into chamber 120 as for the FIG. 1 embodiment. 
An air supply assembly 200 is provided for evaporator 110 to facilitate the 
passage of anesthetic agent 150 from bottle 144 to chamber 120. A first 
fluid passage 202 connects at a "Y" joint 204 with a second fluid passage 
206 and a third fluid passage 208. Passage 206 terminates at an end 210 
disposed above the level of anesthetic agent 150 in chamber 120 while 
passage 208 extends up through spear-head membrane cutter 162. 
A first valve 212 is disposed in passage 202, between a syringe receptacle 
214 and "Y" joint 204, and is configured to be in open condition when a 
needle 216 at the end of a syringe 218 is inserted therethrough and in 
closed configuration when the syringe 218 is removed. A plunger 220 is 
provided for syringe 218. A check valve 226 is disposed in passage 206 and 
is configured to direct flow downward from above the surface of anesthetic 
agent 150. A check valve 228 is disposed in passage 208 and is configured 
to direct flow upward from syringe 218 through passage 208 through ports 
230 in spear-head 162. 
Thus by withdrawing plunger 220 (i.e. moving plunger 220 in the direction 
of arrow A-FIG. 3) fluid is drawn into passage 206 through valves 226 and 
212 and into syringe 218. Movement of plunger 220 in the direction of 
arrow B (FIG. 3) forces such fluid back through passage 202 and into 
passage 208 then through check valve 228 and the rest of passage 208 and 
then out through ports 230 to bubble up through anesthetic agent 150 in 
bottle 144. An increase of air pressure in the bottle 144, and, upon 
withdrawing the plunger 220 a reduction of pressure facilitates the 
transfer of the agent from the bottle 144 to prevent air lock to 
facilitate movement of anesthetic agent 150 directly into chamber 120. The 
fluid thus used to facilitate emptying of anesthetic agent 150 from bottle 
144 is the mixture of carrier gas and anesthetic agent. 
In the embodiment of FIG. 4 there is shown an anesthesia evaporator or 
vaporizer 300, like evaporator 10 of FIGS. 1 and 2, and which includes a 
body 302, inlet tube 304, outlet tube 306, top 320, control knob 330, 
pointer 332, scale 334 and anesthetic agent chamber 334 disposed to 
receive an anesthetic agent 336; all similar to like members described for 
the FIG. 1 embodiment and which all function and coact together as 
described for evaporator 10 of the FIG. 1 embodiment. 
A flow tube 350 extends from chamber 334 into an anesthetic agent well 352 
(FIG. 5) which is carried by an anesthetic agent introduction mechanism 
360 (FIGS. 4 and 5). An anesthetic agent package receptacle 370 carries 
well 352 and includes a bottom rail 372 and a pair of spaced side rails 
374, 376 extending upwardly therefrom each formed to provide a track 382, 
384, 386 respectively. Tracks 382, 384 and 386 are of a size, disposition 
and configuration to position a package 400 (FIG. 4) of anesthetic agent 
336 proximate an opening 402 formed through a front face 404 of evaporator 
300. 
Package 400 is formed of foil of sufficient strength size and configuration 
to contain a pre-measured quantity of anesthetic agent 336 and for a snug 
fit in tracks 382, 384 and 386. If desired suitable gasketing may be 
provided within tracks 382, 384, 386 and at 410 on face 404 of evaporator 
300. 
An inner face 420 (FIG. 4) of foil package 400 is formed to be pierced by 
relatively sharp points 430 (FIG. 5) and 432 of a piercing device 440. A 
first bar 442 of piercing device 440 carries points 430 at a relatively 
low disposition with respect to package receptacle 370 and a package 400 
when carried thereby. While a second bar 444 carries points 432 at a 
relatively high disposition with respect to package receptacle 370 and a 
package 400 when carried thereby. A pair of end bars 450,452 position bars 
442 and 444 in relative disposition with respect to each other, and all of 
such members within chamber 334 of evaporator 300. 
A pair of operating rods 460, 462 (FIGS. 4 and 5) extend out respectively 
from bars 442,444 (FIG. 5) proximate end bar 450, and through openings 464 
(FIG. 4) formed through face 404 of evaporator 300 to have their ends 
connected by an operating handle 470. A pair of guide rods 480, 482 (FIG. 
5) extend out respectively from bars 442, 444 proximate end bar 452 and 
through openings (not shown) formed through face 404 of evaporator 300 to 
coact with rods 460, 462 to guide the movement of points 430 and 432, in 
the directions of arrows X and Y (FIG. 5), between a removed position 
wherein points 430, 432 are spaced from inner face 420 of package 400 and 
a piercing position wherein points 430, 432 pierce inner face 420 of 
package 400. 
When using evaporator or vaporizer 300 one need only connect suitable 
carrier gas conduits to inlet 304 and outlet 306 and thereafter place a 
foil package 400 of suitable anesthetic agent 336 in package receptacle 
370 while piercing device 440 is positioned in its removed position so 
that its points 430, 432 are disposed away from interference with 
insertion of package 400 in receptacle 370. The operator then grips handle 
470 and moves piercing device 440 in the direction of arrow Y (FIG. 5) 
moving points 430, 432 through inner face 420 of foil package 400. 
Movement of handle 470 and of piercing device 440 in the direction of 
arrow X (FIG. 5) pulls points 430, 432 out from inner face 420 of foil 
package 400. 
The disposition of points 430 is such as to pierce inner face 420 of foil 
package 400 relatively low down when package 400 is disposed in receptacle 
370 to facilitate spillage of anesthetic agent 336 therefrom into well 352 
and therefrom through tube 350 into chamber 334. The disposition of points 
432 is such as to pierce inner face 420 of foil package 400 relatively 
high up when package 400 is disposed in receptacle 370 and further 
facilitates the flow of anesthetic agent 336 from package 400. The sizing 
of package 400 and of tracks 382, 384, 386 of receptacle 370 is such as to 
provide a fluid tight fit of package 400 against front face 404 of 
evaporator 300 to prevent seepage of anesthetic agent 336. If desired the 
sizing of tracks 382, 384 and 386 and of package 400 can be selected to 
restrict evaporator 300 to a particular anesthetic agent or class of such 
agents. 
FIG. 6 shows at 471 an alternative construction for the anesthetic agent 
package receiving, retention and opening mechanism, or anesthetic agent 
introduction mechanism, 360 of FIG. 5. A pair of spaced side rails 472 
(only one shown) extend upwardly from a bottom rail 473 and together form 
a substantially "U" shaped anesthetic package receiving and retention 
device open at its top 474. A package receiving track 475, formed in each 
side rail 472, extends up from a package receiving track 476 formed in 
bottom rail 473. Side walls 477 of track 476 taper inwardly and down and 
then terminate at lower sections 478 which may be vertical or continue to 
taper but which terminates at a floor 479 of track 476. 
A plurality of spear-head membrane cutters 480 (only one shown) are 
disposed along and rise up from floor 479 of track 476. Cutters 480 are 
similar in construction to membrane cutters 62 of the FIGS. 1 and 2 
embodiment or cutter 162 of the FIG. 3 embodiment except that a fluid 
passageway 481 extends down through spear-head membrane cutter 480 
intersecting a fluid passageway 482 at the base thereof. An anesthetic 
agent well 483 is carried by and secured to the anesthetic receiving and 
retention device to receive fluid flow from passageways 481, 482 and 
otherwise from fluid flow about cutters 480 as will be hereinafter 
described. A conduit of flow tube 484 leads from well 483 to an anesthetic 
agent chamber (not shown) similar in construction and use to anesthetic 
agent chamber 334 of FIG. 4. 
Tracks 475, 476 and mechanism 471 are of a size, configuration and 
construction to snugly receive a foil wrapped package 485 of anesthetic 
agent 486 similar to package 400 of the FIG. 4 embodiment. As package 485 
is slid through top 474 of tracks 475, 476 in the direction of arrow A 
sides 487 of package 485 engage inner surfaces of tracks 475 and 
thereafter inner surfaces of track 476. Further movement of anesthetic 
agent package 485 into mechanism 471 results in coaction of sides 487 of 
package 485 with inwardly tapered side walls 477 of track 476 to securely 
grip and somewhat squeeze the bottom of package 485. The inward taper of 
side walls 477 is shown somewhat exaggerated to better show its details. 
The configuration of the taper of side walls 477 is such as to effect a 
grip on package sides 487 to facilitate severing of a bottom wall 488 of 
package 485 at 489, at each cutter and possibly in between to permit 
anesthetic agent 486 to flow out of package 485 and out through passages 
481 of cutters 480 and down about the surfaces thereof onto floor 479 of 
track 476 and into well 483, flow tube 484 and therefrom to the anesthetic 
agent chamber to be utilized as described for the other embodiments. 
The coaction of sides 487 of package 485 with side walls 477 of track 476 
is also such that anesthetic agent 486, released by severance of bottom 
wall 488 of package 485, will not seep up around package 485. 
In FIG. 7 there is generally shown at 500 an anesthesia evaporator or 
vaporizer quite similar in construction and function to evaporator 10 of 
FIG. 1 and evaporator 300 of FIG. 4. Evaporator 500 includes a body 502, 
inlet tube 504, outlet tube 506, top 520, control knob 530, points 532, 
scale 534, and anesthetic agent chamber 534; all substantially similar to 
like members described for the FIG. 1 and FIG. 4 embodiments and which 
function and coact together as described for those embodiments. 
An access door 550 is hingedly connected at 552 to a front wall 554 of body 
502 to provide access into chamber 534 through an opening 556 through 
front wall 554 and to close opening 556 and thereby access into chamber 
534. Chamber 534 is of a size, disposition and configuration to receive 
package 560 of anesthetic agent. 
The anesthetic agent within package 560 has been cryogenically frozen and 
is placed within chamber 534 while in its frozen state. Thereafter either 
holes are pierced through the skin of package 560 by a suitably pointed 
instrument, or package 560 is unwrapped fully or partially and the moiety 
within package 560 permitted to sublime so that the fluidic gas so 
produced mixes with carrier gases passing through evaporator 500 to 
provide appropriate anesthesia to a patient undergoing an operation or 
medical procedure. If desired a suitable heating element may be disposed 
proximate chamber 534 to facilitate, aid and if need be induce sublimation 
of the cryogenically frozen anesthetic agent in package 560. In the 
alternative, there may be provided a drawer (not shown) into which frozen 
anesthetic agent may be placed and inserted into chambers 534. The drawer 
upon closing, like two doors, seals the chamber from the outside. 
In the embodiment of FIG. 8 there is generally shown at 600 an anesthetic 
evaporator or vaporizer of the type previously described and which 
includes an anesthesia agent well 602 which incorporates a blade-like 
membrane cutter 604 rising up from a base 606 of well 602. A set of 
internal threads 620 are provided within well 602 for coaction with 
external threads 622 formed about the neck 624 of an anesthetic agent 
package or container 630 in the form of a bottle. Bottle 630 is of the 
type and size for holding an anesthetic agent such as "Isoflurane." 
Threads 620 are also sized and disposed to coact with external threads 632 
formed about the neck 634 a different size anesthetic agent package or 
container 640 (shown in phantom in FIG. 8). Bottle 640 is of a size and 
configuration for holding an anesthetic agent such as "Enflurane." 
Evaporator 10 and anesthetic agent packages 630 and 640 are similar to 
evaporator 10 and anesthetic agent package 72 of the FIG. 1 embodiment; 
except that anesthetic agent well 602 and its internal threads 620 and its 
membrane cutter 604 are disposed at an angle "X" to the vertical. 
Thus, when the pre-packaged anesthetic agent in its package or container 
630 (or 640) is threaded in place in well 602 membrane cutter 604 will 
sever the membrane 650 generally provided within bottle 630 (or 640) just 
as bottle 630 seats in well 602. Anesthetic agent 652 will flow from 
bottle 630 (or 640) into well 602 and from well 602 through a passage or 
tube 660 formed therein and into evaporator 600 for use thereby in an 
otherwise conventional manner. 
Angle "X" is selected to be a 20 degrees to the vertical but angles acute 
to the vertical, preferably between 20 and 30 degrees to the vertical, 
will do. The angle so selected acts to dispose anesthetic package or 
container 630 (or 640) at an angle and functions to compensate and 
stabilize pressure on the anesthetic agent 652, as it enters evaporator 
600, and to facilitate the passage of air through anesthetic agent 652 
into an air space 660 within package or container 630 (640) to further 
facilitate flow of anesthetic agent 652 into evaporator 600. 
In the embodiment of FIGS. 9 and 10 there is generally shown at 700 an 
anesthetic evaporator or vaporizer of the type previously described and 
which includes an anesthesia agent well 702 which incorporates a set of 
internal threads 704 disposed for coaction with external threads 706 
formed about the neck 708 of an anesthetic agent package or container 710 
in the form of a bottle. Bottle 710 is of the type and size for holding an 
anesthetic agent such as "Isoflurane." Threads 706 are also sized and 
disposed to coact with external threads 712 formed about the neck 714 a 
different size anesthetic agent package or container 720 (shown in phantom 
in FIG. 8). Bottle 720 is of a size and configuration for holding an 
anesthetic agent such as "Enflurane." Evaporator 10 and anesthetic agent 
packages 710 and 720 are similar to evaporator 600 and anesthetic agent 
packages 630, 640 of the FIG. 8 embodiment; except that anesthetic agent 
well 702 and its internal threads 704 are disposed in a generally 
cylindrical member 740 rotatably carried by a pair of arms 742 that extend 
out from a wall 744 of evaporator 700. Cylindrical member 740 is carried 
by arms 742 for rotation about an axis of rotation "Z" (FIG. 10) between a 
loading position "I" (FIG. 9) and an operative or discharge position "II". 
A cylinder seat 750 is formed in each arm 742 and so as to face each other 
to receive therebetween cylindrical member 740. An "O" ring 752 is 
disposed in at least one of said cylinder seats 750; but, if desired, "O" 
rings 752 may be disposed in each seat 750. "O" ring(s) 752 apply pressure 
on cylindrical member 740 in the horizontal direction (along the direction 
of axis "Z" (FIG. 10) sufficient to retain cylinder member 740 in desired 
selected positions but such as to permit selected rotation of cylinder 
member 740 between its positions I and II as will be hereinafter 
described. 
Base 760 of well 702 is formed with an opening 762 which communicated with 
a passage into evaporator 700 and which receives anesthetic agent 770 from 
bottle 710 (or (720) and directs agent 770 through that passage into 
evaporator 700 for use in conventional manner. Alternatively, a nozzle or 
tube end may extend up from opening 762 but need not enter the bottle 720 
or 710. The anesthetic agent container 710 (or 720) need not contain a 
membrane 650 because the construction of the invention of FIGS. 9 and 10 
obviates the need of an anesthetic agent package with such a sealing 
membrane. In similar manner to that described above for the embodiment of 
FIG. 8 the disposition of bottle or package 710 (720) at the selected 
angle functions to compensate and stabilize pressure on anesthetic agent 
770 and to facilitate its flow into evaporator 700. 
In use the cap or cover provided for anesthetic agent package 710 (or 720) 
is removed and with cylindrical member 740 disposed to receive its 
anesthetic agent package 710 (or 720) in the I position. External threads 
706 (or 712) of bottle 710 (or 720 respectively) are threaded into 
internal threads 704 of well 702 until bottle 710 (or 720) is fully seated 
in well 704. Bottle 710 (or 720) is then rotated, along with cylindrical 
member 740, into the II position and anesthetic agent 770 will pour into 
well 704 and tube end 762 and then into evaporator 700. Bottle 710 (and 
720), like bottles 630 and 640 of the FIG. 8 embodiment, is preferably 
disposed at an angle "X" to the vertical to compensate and stabilize 
pressure upon anesthetic agent 770. Angle "X" is preferably selected at 20 
degrees to the vertical but angles between 20 and 30 degrees to the 
vertical will also do. 
If desired, a strap 780 (FIG. 9) may be connected by suitable connecting 
means 782 to evaporator 700 and disposed as shown in FIG. 9 to further 
secure bottle 710 (or 720) in its II or discharge position. A strap (not 
shown) like strap 780 may also be utilized with bottles 630, 640 of the 
FIG. 8 embodiment. 
From the above description it will thus be seen that there has been 
provided new and novel anesthetic agent evaporators which are relatively 
simple and reliable in construction and operation. 
It is understood that although I have shown the preferred embodiments of my 
invention that various modifications may be made in the details thereof 
without departing from the spirit as comprehended by the following claims.