Breath activated medication spray

An inhalation device for dispensing a medicament from a metered dosage cartridge that includes a hand-held housing having a mouthpiece and a passageway for ambient air, a triggering mechanism mounted in the housing, a biasing device for moving the cartridge to operative relationship with the passageway upon activation by the triggering mechanism, and a battery-powered circuit in the housing including a switch associated with the passageway and a solenoid operated mechanism secured to the housing for activating the trigger mechanism, with the switch acting to close the circuit and so activate the solenoid so as to activate the trigger mechanism and the biasing device so that the cartridge positions an activated outlet pin into the passageway. The switch is activated by the pressure of the passage of air drawn through the passageway by the inhaling action of the patient.

BACKGROUND OF THE INVENTION 
The present invention relates to an inhalation device, whereby the action 
of inhaling activates a vial containing medication which then releases a 
metered dose or predetermined amount of medication directly into the 
patient's mouth. 
Heretofore, devices for inhaling medicines, such as liquid medicaments into 
the lungs under pressure action were not activated by an inhaling action 
of the user. Such prior art devices are exemplified by the following U.S. 
Pat. Nos.: 
Mobley, 1,614,532 
Pitesky et al. 3,776,227 
Hogg, 3,326,231 
Updegraff, 3,045,671 
Johnston, 3,012,694 
Doak, 2,970,594 
Hamilton et al. 2,852,023 
Levitt, 2,428,425 
Kitrell, 4,297,999 
Kropfhammer, 3,964,478 
Jones, 1,176,146 
Schroder, 1,693,730 
Sholes, 2,119,446 
Olowinski, 2,510,712 
U.S. Pat. No. 1,614,532 issued to Mobley on Jan. 18, 1927 discloses a 
device for applying liquid medicaments under pressure whereby a canister 
containing medicament whereby a canister containing medicaments under 
pressure is opened by a small pin which is manually operated by the thumb 
or a finger of the user. The released liquid travels through a spirally 
whirling motion and is ejected as a stream which is inhaled by the user. 
U.S. Pat. No. 3,776,227 issued to Pitesky et al., on Dec. 4, 1973 discloses 
a device whereby a cartridge containing gas under pressure is opened by a 
pin which results in a flow of released gas. The opening is activated by 
manually rotating a housing containing a pressurized container and 
valve-supporting head relative to one another until the cartridge is 
punctured. 
U.S. Pat. No. 3,326,231 issued to Hogg on June 20, 1967 discloses a fluid 
regulating valve mechanism whereby the flow rate of a fluid released from 
a puncturable storage container which is ultimately inhaled by the user is 
metered by regulating the size of the needle valve formed when a pin 
pierces the container. This process is started by manually depressing an 
actuator so that the pin will pierce into the compressed container. 
U.S. Pat. No. 3,045,671 issued to Updegraff on July 24, 1962 discloses a 
device whereby a cartridge containing gas under pressure is pierced by a 
hollow pin or needle which releases a gas which is ultimately inhaled by 
the user. The piercing of the pressurized capsule containing the gas is 
performed by manually screwing the pin into the cartridge's seal. 
U.S. Pat. No. 3,012,694 issued to Johnston on Dec. 12, 1961 discloses a gas 
dispensing device whereby gas contained in a pressurized container is 
released when a point punctures the container. A handwheel manually 
operates a threaded member which moves the capsule closer to the point 
which eventually punctures the container. A sleeve may manually be moved 
to restrict the opening of the hole and thus regulate the flow of gas to 
be inhaled. 
U.S. Pat. No. 2,970,594 issued to Doak on Feb. 7, 1961 discloses a device 
whereby gas contained in a pressurized container is released for ultimate 
inhaling by the user when a pin pierces the container. The piercing action 
is regulated by the closing of the door on the chamber which holds the 
capsule which, in turn, manually forces the pin onto the capsule, when the 
capsule is so pierced the gas. 
U.S. Pat. No. 2,852,023 issued to Hamilton et al. on Sept. 16, 1958 
discloses a closed system whereby gas contained in a pressurized capsule 
is released by pulling a ring which, in turn, causes a perforater to move 
upward and penetrate into the capsule. The escaped gas can then be 
inhaled. The chamber into which the gas escapes contains a chemical which 
will remove carbon dioxide from the exhaled breath of the user. The 
exhaled breath can thus be inhaled. 
U.S. Pat. No. 2,428,425 issued to Levitt on Oct. 7, 1947 discloses a 
portable oxygen breather whereby gas contained under pressure in a capsule 
is released when a pin pierces the capsule by means of a manually operated 
screwing device. 
U.S. Pat. No. 4,297,999 issued to Kitrell on Nov. 3, 1981 discloses an 
inhaler whereby a bellows-type pump is utilized to pump oxygen or 
atmospheric gas into the inhaler's lungs. 
U.S. Pat. No. 3,964,478 issued to Kropfhammer on June 22, 1976 discloses a 
device whereby a value is manually opened, which permits oxygen to flow 
into an applicator to be eventually inhaled. 
U.S. Pat. No. 1,176,446 issued to Jones on Mar. 21, 1916 discloses a device 
whereby the amount of anesthetic inhaled can be regulated by the inhaler 
by a pressing movement of the user's thumb. By so working with the thumb, 
the user can either open or close an air intake valve from which the gas 
tos be inhaled is supplied. 
U.S. Pat. No. 1,693,730 issued to Schroder on Dec. 4, 1928 discloses a 
device whereby the quantity of air inhaled corresponds to the depth of the 
user's breathing. There are no pins or piercing devices needed to dispense 
a predetermined amount of gas. The flow of the compressed gas creates a 
vacuum or partial vacuum which draws medicament into the device by 
droplets. These are then driven into the nozzle and eventually inhaled in 
a fine spray. 
U.S. Pat. No. 2,119,446 issued to Sholes on May 31, 1938 discloses an 
apparatus for self-administration of anesthestic whereby the inhaler 
manually alternately compresses and/or releases a contractible and/or 
expansable rubber ball which controls the supply of gas to the inhaler. 
U.S. Pat. No. 2,510,712 issued to Olowinski on June 6, 1950 discloses a 
portable gas dispenser which dispenses a gas under the manual control of 
the user, including a means for adding medicaments to the gas dispensed. 
The valve mechanism which controls the flow of the compressed gas 
contained in a flask is controlled by manual movement of a rotatable valve 
plug. A manual threading action opens the valve which allows the gas to 
escape by controlled means. A receptable can be filled with medicament 
which is inhaled with the gas. 
None of the above-mentioned references, show the use of an inhalation 
device which is solely activated by the action of inhalation. 
SUMMARY OF THE INVENTION 
It is therefore an object of this invention to provide for a device in 
which the action of inhaling activates a series of reactions or steps 
whereby a vial containing medication is opened by a pin, thus releasing a 
metered dose or predetermined amount of medication which is directly 
inhaled into the user's mouth. 
Another object of the invention is to provide for a manual override which 
causes the device to be activated apart from the inhaling action of the 
user. 
Yet another object of the invention is to provide for a device which is 
simple in construction and one which is relatively inexpensive to produce. 
Another object of the invention is to provide for a device which is 
portable and small enough in scale to be carried easily by the user, such 
as for example in one's pocket.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
FIG. 1 shows a perspective view of the device constructed in accordance 
with the principles of the present invention which embodies a housing or 
case means 10, preferably composed of plastic, which is openable suitably 
along a longitudinal axial seam 11, whereby said case means 10 is divided 
into halves, one of which is best shown in FIGS. 2 and 3. A straight lever 
arm means 12 comprising a T-shaped handle portion 13, is cooperatively 
associated with an L-shaped curved lever arm means 14 by means of notched 
surfaces. The lever arm means 14 comprises a handle portion 26, suitably 
provided with a finger loop, so that said straight lever arm means 12 and 
said curved lever arm means 14 are disposed exteriorly of the case means 
10, so that they are easily accessible to the user when the device is in 
use. The user manually cocks the device by outwardly pulling the curved 
lever arm means 14 which in turn raises slightly the straight lever arms 
means 12. The device is now a "standby" or cocked position. It is apparent 
from FIG. 3, when the device is in the uncocked position, same is akin to 
a safety feature since the device cannot be accidentally set off while not 
in use. A suitably removable mouthpiece means 16 mounted on the case means 
10 is easily accessible to the user, so that the orifice portion 50 of 
said mouth piece means 16 can be placed into one's mouth while holding the 
device in a hand while at the same time cocking the apparatus prior to 
use. The mouthpiece means 16 is removable for cleaning and it may be 
provided with a friction fit. Access means for the medicine cartridge may 
be provided in the case means 10, such as by panel 22 which may be 
suitably removed from said case means 10 in order to make the cartridge 
compartment 24 easily accessible for replacing a cartridge 24, as best 
shown in FIGS. 2 and 3. Another panel 18 of said case means 10 provides 
easy access to a suitable power source, such as a battery (shown in 
phantom). 
By inhaling through said mouthpiece means 16, atmospheric air is taken in 
through intake opening 70 of conduit 68 in case means 10. By so inhaling, 
the user activates a series of steps which culminate when a predetermined 
metered amount of medicament stored in a cartridge is mixed with air and 
is ultimately inhaled by the user. 
With a dead battery, the device can also be manually operated by the user 
by pushing T-shaped handle portion 13 of said straight lever arm means 12 
in an upwardly direction, as shown by an arrow, thus disengaging said 
notched interfaced straight lever arm means 12 from the curved lever arm 
means 14, which, in turn, activates a series of steps, whereby a 
predetermined metered amount of medicament is ultimately inhaled by the 
user. 
FIG. 2 illustrates a planar view of the inner components of the device of 
FIG. 1, and the device is illustrated in the cocked position. 
The notched edge portion of said straight lever arm means 12 engages the 
notched edge portion 32 of said curved lever arm means 14, which allows 
for the notched interfaced locking of said straight and curved lever arms, 
12 and 14, respectively. 
Suitable spring means 36, such as a torsion spring, fixably attached at one 
end to a central wall portion 74 of said case means 10, and its turns are 
disposed around a conforming cylindrical outwardly projecting pivotal 
shaft mount portion 42 of said straight lever arm means 12, so as to exert 
a torsion which forces said straight level arm means 12 against said 
curved lever arm means 14. Thus, the interfaced notched portion 30 of said 
straight lever arm means 12 engages against said notched edge portion 32 
of said curved lever arm means 14. The other end of the spring means 36 
extends into a blind hole and is thereby connected to the shaft portion 42 
for urging same in a counterclockwise direction, as shown by the reference 
arrowhead in FIG. 2. 
Alternatively, the non-movable end of the spring means 36 can be fixably 
attached to other proximate wall surface portions of said case means 10, 
such as, upper wall surface 78. 
Pin and/or tube portion 46 of said cartridge means 24 is retractably 
disposed with respect to disc portion 92 of the cartridge means 24 and is 
seated within a recessed end portion 44 of said curved lever arm means 14, 
preferably U-shaped in form to fascilitate replacement of the cartridge. 
The cartridge is conventionally available and is of a standard size, and 
the pharmaceutical industry manufactures such cartridges with a variety of 
medicaments. Disc portion 92 of said cartridge means 24 sits atop the 
U-shaped recessed end portion 44 of said curved lever arm means 14. 
While an end of said curved lever arm means 14 is preferably U-shaped, an 
alternate construction is possible, such as, a circular opening in which 
the diameter of said circular opening approximates the diameter of the 
cylindrical pin portion 46. The pin portion 46 of said cartridge means 24 
is directly aligned with an aperture in the conduit portion 48 of said 
mouthpiece means 16, as best shown in FIG. 4. 
Compression spring means 52 securely exerts a downward force upon the 
depressed disc-like edge portion 80 of canister portion 94 of the 
cartridge means 24, which tensionally holds said cartridge means 24 
against said U-shaped recessed end portion 44 of said curved lever arm 
means 14. 
Angled door means 54, having an attached magnet 56, and a stop portion 58 
is rotatably mounted about pivot means 60. The stop portion 58 of the door 
means leans up against the passageway wall when the air conduit is closed. 
The magnet 56 of the door means 54 is attracted to the metallic means 62, 
suitably in the form of a pin, so as to restrain the door means 54 from 
moving. If the door means 54 moves, the magnet 56 activates switch means 
64, of electric circuitry which, in turn, energizes solenoid means 66. 
Alternate means to frictionally retain said door means 54 in a fixed 
position could also be utilized, but said magnet 56 is necessary in the 
embodiment shown herein as the contacts of a reed switch as shown are 
closed by the magnet 56 when it is juxtaposed or in proximity to said reed 
switch means 64. Thus, switch means 64 of FIG. 2 is shown in open 
position. Solenoid means 66 is shown in position behind the curved lever 
arm means 14. 
FIG. 3 illustrates the components of the device in an activated position. 
Inhaling through the orifice 50 of mouthpiece means 16 creates an inwardly 
flow of air (as shown by the referenced arrow) through conduit 68 of case 
means 10 which is defined by wall portions 86 (a & b), so that atmospheric 
air enters said conduit 68 of said case means 10 inwardly through end 
aperture 70, and the air flows against door means 54 and exits outwardly 
through said mouthpiece means 16. The force of said air flow against said 
door means 54, causes the magnet 56 of the door means 54 to disengage from 
the metallic arresting means 62 and to rotate and pass the air through the 
passageway, so as to cause said magnet 56 of said door means 54 to come 
into proximity with the switch means 64 causing the adjacently disposed 
contacts of said switch means 64 to close the electric series circuit and 
thereby activate the solenoid 66. Switch means 64 is preferably of the 
reed type, however, other alternate types of switch means may be employed 
in the practice of the invention, along with suitable door means for 
closing or activating such alternate switch device. 
The closing of said switch means 64, completes a series type circuit 
comprising a battery housed in battery compartment 82 of said case means 
10, a switch and a solenoid, and such circuit allows for the flow of 
electrical current to activate the solenoid means 66. 
When in the activated position, the plunger portion 96 of said solenoid 
means 66, moves outwardly from said solenoid means 66 which causes said 
plunger portion 96 to strike the straight lever arm means 12. This in 
turn, causes the notched edged portion 30 of said straight lever arm means 
12 to disengage from said notched edged portion 32 of said curved lever 
arm means 14, and thereafter the straight lever arm means 12 rotates in a 
clockwise direction, as shown by the reference arrow in FIG. 3. The 
plunger 96 travels a suitable distance A--A which is of sufficient length 
to completely disengage the interacting lever arms. 
In the disengagement position, the spring means 52 exerts a downward force 
upon the cartridge means 24, which causes said curved lever arm means 14 
which is mounted upon a suitable shaft 100 to rotate in a clockwise 
direction, so that said pin portion 46 of said cartridge means 24 moves a 
suitable distance B--B as shown in FIG. 2, and thus strikes a recessed or 
countersunk bore formed in an end of the conduit portion 48 of the 
mouthpiece 16 which is integrally formed with the mouthpiece 16. As best 
shown in FIGS. 3 and 4, when said pin portion 46 of said cartridge means 
24 strikes the bore of said mouthpiece means 16, the pin portion 46 of 
said cartridge means 16 moves into the cartridge means 24, thereby 
permitting a predetermined or metered amount of a medicament to be 
released into said conduit 48 and passageway 49 of said mouthpiece means 
16 and subsequently into the mouthpiece 16, where said medicament is mixed 
with the air flowing through conduit 68 of said case means 10, and then 
the mixture is inhaled by the user. 
After inhalation ceases, the flow of air through conduit portion 68 of said 
case means 10 stops, and the metallic retaining means 62 engages the 
pivoted door means 54 due to gravatational forces returning the door to 
its closed position, and thus the magnet 56 agains holds the door 54 in a 
stationary inoperative position. In such position, the magnet 56 can not 
come into close proximity with said switch means 64, which would otherwise 
close the circuit and cause a steady and/or intermittant drain of the 
battery. 
Although the present invention has been described in some detail by way of 
illustration and example, for purposes of clarity and understanding, it 
will, of course, be understood that various changes and modifications may 
be made in the form, details and arrangements of parts without departing 
from the scope of the invention as set forth in the following claims: