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1. (WO1980001459) SYSTEME D"INJECTION AUTONOME
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique
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CLAIMS
1. A method of injecting fluid into a patient at
an average prescribed injection rate over a prolonged period of time from a chamber carrying the fluid with an
5 outlet connecting the fluid to the patient and with a
piston in the. chamber movable toward the outlet to
force the fluid into the patient CHARACTERIZED BY the
steps of:
connecting the piston to a driving means con- 10. structed and arranged to move the piston only a prescribed distance toward the outlet each time the driving means is operated regardless of the length of time
the driving means is operated to force a known volume of
the fluid into the patient each time the piston is moved
15 the prescribed distance at an injection rate greater
than the desired average prescribed rate where the known
volume of fluid is much less than the total volume of
fluid to be injected over the prolonged period of time;
and
20 alternately operating and stopping the operation of the driving means to cause the fluid to be injected at the average prescribed rate over the sume of
the times the driving means is -operated and not operated
so that, in the event of a malfunction which continu- 25 ously operates the driving means, the piston will be
moved only the prescribed distance toward the outlet
to prevent overdosing the patient.
2. The method of Claim 1 where the step of alternately operating and stopping the operation of the
driving means is further CHARACTERIZED BY the substeps
of: ~
5 alternately operating the driving means for a
first prescribed short period of time of fixed duration
much less than the prolonged-period of time;

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alternatively stopping the operation of the driving means for a second prescribed short period of time less than the prolonged period of time so that the fluid is injected into the patient at the desired average prescribed rate over the sum of the first and second prescribed short periods of time; and
selectively varying the duration of only the second prescribed short period of time without varying the duration of the first prescribed short period of time to selectively vary the selected prescribed average rate at which the fluid is injected into the patient.
3. The method of Claim 1 wherein the driving means includes an electro-mechanical device which is electrically operated to produce a mechanical output, and check means for limiting the mechanical output of the electro-mechanical device, and wherein the step of connecting the piston to the driving means is further
CHARACTERIZED BY the stubsteps of:
connecting the mechanical output of the electro-mechanical device to the piston to move the piston;
causing the check means to limit the mechanical output of the electro-mechanical device to a prescribed amount each time the electo-mechanical device is operated regardless of the length of time the electro-mechanical device is operated so that the piston is moved only the prescribed distance toward the outlet each time the electro-mechanical device is operated; and
resetting the check means"each time the opera-tion of the electro-mechanical device is stopped to permit the electro-mechanical device to again move the piston the prescribed distance toward the outlet the next time the electro-mechanical device is operated.

4. Apparatus for carrying out the method of
Claim 1 CHARACTERIZED BY:
a container defining a fluid chamber therein carrying the fluid to be dispensed and an outlet from said fluid chamber connected to the patient;
a piston slidably mounted in said fluid chamber for forcing fluid from said outlet as said piston is moved toward said outlet;
an electrical power supply;
electrically operated driving means for moving said piston toward said outlet when said electrically operated driving means is connected to said power supply, said electrically operated driving means constructed and arranged to move said piston only a prescribed dis-tance toward said outlet each time said electrical power supply is connected to said electrically operated driving means regardless of the length of time said electrical power supply is connected to said electrically operated driving means, said piston forcing a volume of the fluid from said outlet much less than the total volume of fluid to be injected over the prolonged period of time each time said piston is moved said prescribed distance; and
control means for selectively connecting said electrical power supply to and disconnecting said electrical power supply from said electrically operated driving means at a rate such that fluid is injected into the patient at the desired average rate over the prolonged period of time so that, if said control means fails so as to continuously connect said electrical power to said electrically operated'driving means, said piston will be moved only said incremental prescribed distance toward said outlet to prevent overdosing the patient.

5. The apparatus of Claim 4 further CHARACTERIZED BY said electrically operated driving means being a solenoid.
6. The apparatus of Claim 4 further CHARACTERIZED BY said electrically operated driving means being a stepping motor.
7. The apparatus of Claim 4 further CHARACTERIZED BY said electrically operated driving means including resettable stop means for physically limiting the amount of movement transmitted from said electri-cally operated driving means to said piston each time said electrically operated driving means is connected to said electrical power supply, said resettable stop means resetting itself while said electrically operated driving means is disconnected from said power supply to permit further movement to be transmitted to said piston when said electrically operated driving means is reconnected to said power supply.
8. The apparatus of Claim 4 further CHARACTERIZED BY manually operated flushing means operatively connected to said piston for selectively moving said piston independently of said electrically operated driving means.
9. The apparatus of Claim 5 further CHARACTERIZED BY said driving means including ratchet means operatively connecting said solenoid to said piston so that the reciprocating motion output of said solenoid moves said piston in a first direction toward said outlet.
10. The apparatus of Claim 9 further CHARACTERIZED BY said driving means including" clutch means operatively connected to said piston for permitting said solenoid to move said piston only in said first direction.

11. The apparatus of Claim 10 further CHARACTERIZED BY said driving means including:
a first threaded member carried by said housing;
a second threaded member threadedly engaging said first threaded member so that relative rotation between said threaded members causes said second threaded member to be axially moved to selectively engage and move said piston is said first direction toward the fluid outlet to force the fluid out of the fluid outlet in said container into the patient, said ratchet means operatively connecting said solenoid to said second threaded member to effect relative rotation between said first and second threaded member.
12. The appratus of Claim 11 wherein said driving means is further CHARACTERIZED BY:
a drive member mounted in said housing co-axially with said second threaded member, said drive member axially fixed with respect to said first threaded member and rotatable about its axis; and
a slip joint interconnecting that end of said second threaded member opposite said piston with said drive member so that said second threaded member is axially movable with respect to said drive member while remaining rotationally fixed with respect to said drive member whereby rotation of said drive member rotates said second threaded member, said ratchet means operatively connecting said solenoid to said drive member to rotate said drive member.
13. The apparatus of Claim 4 wherein said control means is further CHARACTERIZED BY:
switching means for selectively connecting said electrical, power supply to said electrically ope-rated driving means;

timing pulse generator means for operating said switching means; and
programming means for selectively controlling the timing pulse rate output of said timing pulse generator.
14. The -apparatus of Claim 13 wherein said control means is further CHARACTERIZED BY mode selector means for selectively activating said programming means to permit adjustment said programming means to change the timing pulse rate output of said timing pulse generator means and for selectively causing said timing pulse generator means to generate the timing pulse rate output selected by said programming means while preventing adjustment of said programming means.
15. The apparatus of Claim 13 wherein said control means is further CHARACTERIZED BY:
display means for providing a visual output; and
monitoring means operatively connecting said timing pulse generator means to said display means to cause said visual output of said display means to be indicative of the average prescribed injection rate.
16. The apparatus of Claim 13 wherein said control means is further CHARACTERIZED BY disabling means operatively connected to said timing pulse generator means and said switching means to cause said switching means to disconnect said driving means from said electrical power supply upon malfunction of said timing pulse generator means.
17. A method of injecting a fluid into a patient at an average prescribed rate over a prolonged period of time CHARACTERIZED BY the steps of:
alternatively injecting the fluid into the pa-tient at a first prescribed rate greater than the desired average prescribed rate for a first prescribed short period of time of fixed duration much less than the prolonged period of time;
alternatively stopping the injection of the
fluid into the patient for a second prescribed short
period of time less- than the prolonged period of time
so that the fluid is injected into the patient at the
desired average prescribed rate over the sum of the first and second prescribed short periods of time; and
selectively varying the duration of only the second prescribed short period of time without varying the duration of the first prescribed short period of time to selectively vary the selected prescribed average rate at which the .fluid is injected into the patient.
18. Apparatus for carrying out the method of Claim
17 CHARACTERIZED BY:
container means defining a fluid chamber
therein for containing the fluid to be dispensed and
defining a fluid outlet therefrom through which the fluid is to be dispensed into the patient;
expelling means operatively associated with
the fluid in said container means to expel the liquid
from said container means, said expelling means including a piston member slidably mounted in said fluid chamber for positively forcing the fluid from said -fluid outlet as said piston member moves toward said fluid outlet,
said piston member moved toward said fluid outlet when said expelling means is driven;
electrically operated driving means for selectively driving said expelling means to force said
piston member toward said fluid outlet;
an electrical power supply*; and
control means for selectively and successively connecting said electrically operated driving means to said electrical power supply to cause said piston member to successively and incrementally force the fluid from

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A, WIPO v, said fluid outlet in said container means into the patient at a selected prescribed average rate over a pro-longed period of time, said control means alternatively connecting said driving means to said electrical power supply for a first prescribed short period of time of fixed duration so that said driving means causes said expelling means to force fluid from said fluid outlet in said container means at a first prescribed rate greater than the selected prescribed average rate and said control means alternatively disconnecting said driving means from said electrical power supply for a second prescribed short period of time to stop the fluid flow from said fluid outlet so that the fluid is forced from said fluid outlet in said container at the selected prescribed average rate over the sum of said first and second periods of time, said control means including adjustment means for selectively varying the duration of only said second presc'irbed short period of time without varying the duration of said first prescribed period of time to selectively vary the selected prescribed average rate at which the fluid is forced from said fluid outlet of said container into the patient.
19. The apparatus of Claim 18 further CHARACTERIZED BY connection means connecting said fluid outlet on said container means to the patient so that the fluid is injected into the patient at the average pre-scribed rate over the sum of said first and second short periods of time during the prolonged period of time.
20. The apparatus of Claim 19 further CHARACTERIZED BY indicator means for providing a human receptive indication of each occurrence of said first prescribed short time period during which said driving means is connected to said power supply.

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21. The apparatus of Claim 18 wherein said container means is further CHARACTERIZED BY an .ampule assembly comprising a seamless tubular side wall defining a passage therethrough opening onto opposite ends of said side wall, and a penetrable member closing one end of said passage at one end of said side wall, said piston member slidably received in said passage from that end of said tubular side wall opposite said penetrable member and in sealing engagement with said tubu-lar side wall, said tubular side wall, said piston member and said penetrable member defining the closed fluid chamber filled with the fluid; and said container means -further including a piercing assembly defining said fluid outlet therethrough for selectively penetra-ting said penetrable member to place said fluid outlet in communication with the fluid in the fluid chamber so that, as said piston member is forced toward said penetrable member, the fluid will be expelled through said fluid outlet.
22. The apparatus of Claim 21 wherein said piercing assembly is further CHARACTERIZED BY a piercing member defining said fluid outlet therethrough and having a sharpened piercing point thereon for penetra-ting said penetrable member on said ampule assembly; and a cover assembly for enhancing the sterility of said piercing member, said cover assembly comprising a penetrable cover member capable of being penetrated by the piercing point on said piercing member, positioning means for selectively positioning said penetrable cover member in alignment with the piercing point of said piercing member so that said penetrable cover member is movable axially of said piercing member from a non-use position in which the piercing point of said piercing member is enclosed by said positioning means and said penetrable cover member to a use position in which the piercing point of said piercing member is exposed by penetrating the penetrable cover member, and urging means for urging said penetrable cover member toward its non-use position.
23. A method of subcutaneously injecting fluids from a fluid supply source into the subcutaneous fat layer of a patient using an injection needle with a sharpened end thereon and a locating surface CHARAC-TERIZED BY the steps of:
positively locating the injection needle with respect to a locating surface so that the sharpened end of the needle projects from the locating surface a prescribed distance slightly less than the minimum dis-tance between the skin surface and the interface between the subcutaneous fat layer and the muscle tissue in the patient likely to be encountered at the position where subcutaneous injection is to take place, and so that the sharpened end of the needle is oriented generally normal to the locating surface;

ins.-rting the sharpened end of the needle into the patient at that position where subcutaneous injection is to take place until the locating surface is in juxtaposition with the skin surface while maintaining the positive location to insure that the sharpened end of the needle is located within the subcutaneous fat layer; and
attaching the needle and locating surface to the patient to keep them in place.
24. Apparatus for carrying out the method of
Claim 23 CHARACTERIZED BY:
an injection needle defining a fluid passage therethrough, said injection needle having an inlet end connectible to the fluid supply source and a sharpened outlet end adapted to puncture the patient's skin and subcutaneous fat layer;

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thereon adapted to lie against the patient's skin and said sharpened end of said needle projecting from said locating surface generally normal thereto so that said sharpened end is located a prescribed distance from said surface to positively control the depth of pene-tration of said sharpened end of said needle into the subcutaneous fat layer of the patient when said locating surface is in juxtaposition with the patient's skin.
25. The apparatus of Claim 24 wherein said injection needle is further CHARACTERIZED BY a locating section thereon adjacent said inlet end, and a penetrating section thereon adjacent said sharpened outlet end integral with said locating section and oriented generally normal to said locating section, said locating section mounted on said locator means so that said locating section is generally parallel to said locating surface and so that said penetrating section projects from said locating surface generally normal thereto.
26. The apparatus of Claim 25 further CHARACTERIZED BY penetration adjustment means for selectively changing said prescribed distance that said sharpened end of said needle projects from said locating surface.

27. The apparatus of Claim 25 further CHARACTERIZED BY an antimicrobal substance around said needle penetrating section of said needle so that said antimicrobal substance is placed in operative cooperation with the puncture in the patient's skin made by said needle.

28. The apparatus of Claim 25 further CHARACTERIZED BY said locator means constructed and arranged so that said locator means is foldable about a fold axis generally coaxial with said locating section of said needle whereby those portions of said locator means on opposite sides of said fold axis can be folded over said penetrating section of said needle to cover same and alternately unfolded from around said penetrating section of said needle to expose same for use.

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