Abstract: A system and method for a patch-like, self-contained substance infusion device which provides one or more substantially hidden patient needles which can be placed in fluid communication with a fluid reservoir subassembly that includes a rigid bladder portion used in conjunction with a non-distensible bladder film, such as a metallized film. Simple removal of an interlock allows a disk, or Belleville spring assembly to apply an essentially even and constant pressure to the contents of the fluid reservoir assembly, and allows the device to then be attached to a skin surface via an adhesive contact surface. A push button activation assembly is provided which can then be used to release and seat one or more spring-loaded patient needles into the skin surface, and establish a fluid communication path between the patient needles and the pressurized fluid reservoir contents thereby delivering an infusion into the skin.

Abstract: An infusion pump unit includes a housing sized to allow the pump unit to be carried as a portable unit. The housing contains a controllable pumping system for pumping fluid. The pump actuator is lighter, smaller, quieter and less power consuming.

Abstract: A fluid dispenser for use in controllably dispensing fluid medicaments, such as antibiotics, oncolytics, hormones, steroids, blood clotting agents, analgesics, bio pharmaceuticals and like medicinal agents from a reservoir that has been filled from prefilled containers. The fluid dispenser includes a housing to which fill vials can be connected for filling the dispenser reservoir with the fluid, and a stored energy source provided in the form of a substantially constant-force spring that provides the force necessary to continuously and uniformly expel fluid from the device reservoir. The fluid dispenser also includes a fluid flow control assembly that precisely controls the flow of the medicament solution to the patient.

Abstract: A compact fluid dispenser for use in controllably dispensing fluid medicaments, such as, antibiotics, oncolytics, hormones, steroids, blood clotting agents, analgesics, and like medicinal agents from prefilled containers at a uniform rate. The dispenser uniquely includes a stored energy source that is provided in the form of a substantially constant-force, compressible-expandable wave spring that provides the force necessary to continuously and uniformly expel fluid from the device reservoir. The device further includes a fluid flow control assembly that precisely controls the flow of medicament solution to the patient.

Abstract: A fluid delivery device for delivering a substance to a patient by way of infusion delivers the preparation at a rate of flow which varies in steps from a substantially constant higher rate, to a stepped-down substantially constant lower rate or rates. The delivery device includes one or more reservoirs, and one or more Belleville springs for applying generally constant pressures to the substance contained in the reservoirs. Each reservoir will have a different constant pressure applied in a mid-range of operation. The reservoirs can be interconnected to each other and to an infusion device in a number of arrangements, including various manifolds and flow restrictors, such that the rate of flow is controlled in steps in accordance with the pressures applied by the springs of the plurality of reservoirs.

Abstract: A delivery device for delivering a substance intradermally into the skin of a patient including a housing for contacting the surface of the skin and a disposable cartridge to be received in the housing. The cartridge includes an internal reservoir containing a substance to be delivered to the patient, a plurality of micro skin penetrating members and a fluid channel extending between the micro skin penetrating members and the reservoir. The housing includes a bottom wall with a central opening and a cover member. The cartridge is positioned in the housing with the micro skin penetrating members extending through the central opening of the bottom wall and positioned on the surface of the skin of a patient. The cover is closed onto the cartridge to dispense the substance from the cartridge through the micro skin penetrating members and into or through the skin of the patient.

Abstract: An apparatus for administering a substance, including a housing, a piston, a container and a propelling device, the propelling device including a base element, a first shifting stage shiftable relative to the base element, and a second shifting stage shiftable relative to the base element and to the first shifting stage and slaving the first shifting stage, wherein the propelling device, container and piston are operably coupled to the housing and the first shifting stage is in contact with the piston.

Abstract: A device for delivering fluid to a person includes a reservoir for containing a fluid to be delivered to the person; a fluid transport device for dispensing fluid from the reservoir to the person, the fluid transport device including a proximal end in fluid communication with the reservoir and a distal end having a penetrating member for piercing the skin of the person to facilitate the delivery of fluid to the person through the fluid transport device; a housing containing the reservoir and the fluid transport device, the housing including an exit port for receiving the distal end of the fluid transport device upon injection of the distal end into the person and means for securing a first wall of the housing to the skin of the person; and an injection activation device including a driving mechanism contacting the fluid transport device for driving the penetrating member from a first position within the housing, through the exit port to a second position, external to the housing and into the skin of the perso

Abstract: An injector includes a housing having a chamber for holding a liquid formulation of an active principle to be injected into a biological body and an output port in fluid communication with the chamber through which the liquid formulation is injected. A piston is positioned within the housing, and includes an end portion with substantially the same shape as the chamber. A magnetic force draws the piston and housing together to expel the liquid formulation out of the chamber through the output port.

Abstract: A device for administering an injectable product in doses, wherein the device includes a casing, a reservoir for the product, a piston, an advancing element which moves the piston a selected path length, and a dosing mechanism including a number of dosing bodies and a dosing element operable to move the dosing bodies, wherein the path length is selected by the dosing element moving at least one dosing body between the piston and the advancing element.

Abstract: The invention provides a syringe and a method for using the same. The syringe includes a housing having a reservoir disposed therein and a plunger to be received by the reservoir, the plunger being moveable between a first plunger position and a second plunger position. The syringe also includes a plunger spring to urge the plunger toward the second plunger position and an actuator to deploy the plunger spring. The syringe also includes a needle proximate the distal end of the housing displaceable from a first needle position to a second needle position, and a shroud coupled with the housing. The shroud is moveable between a retracted position and an extended position, the shroud surrounding at least a portion of the needle when in the extended position. The syringe also includes an interlocking assembly, a shroud spring, and a locking assembly configured to inhibit movement of the shroud.

Abstract: A medication delivery pen is provided including a leadscrew having a plurality of threads; a driver coaxially disposed about at least a portion of the leadscrew; a dosing ring non-rotatably disposed on the driver, the dosing ring also being slidable along the driver; and, a dose knob coaxially disposed about the dosing ring. At least one tooth is formed on one of the dose knob and the dosing ring, and at least one groove is formed on the other of the dose knob and the dosing ring, with the groove being formed to receive the tooth. The dosing ring is selectively movable relative to the dose knob from a first position where the tooth and the groove are spaced apart to a second position where the tooth is received within the groove, the dosing ring being rotatable with the dose knob with the dosing ring being in the second position.

Abstract: An analyte monitor includes a sensor, a sensor control unit, and a display unit. The sensor control unit typically has a housing adapted for placement on skin and is adapted to receive a portion of an electrochemical sensor. The sensor control unit also includes two or more conductive contacts disposed on the housing and configured for coupling to two or more contact pads on the sensor. A transmitter is disposed in the housing and coupled to the plurality of conductive contacts for transmitting data obtained using the sensor. The display unit has a receiver for receiving data transmitted by the transmitter of the sensor control unit and a display coupled to the receiver for displaying an indication of a level of an analyte, such as blood glucose. An inserter having a retractable introducer is provided for subcutaneously implanting the sensor in a predictable and reliable fashion.

Abstract: An injector for injecting a fluid medicament includes an injector body, a medicament chamber and a plunger that can be advanced into the chamber to expel medicament from the distal end of the chamber. An air-in-tip mechanism is provided within the injector body for partially withdrawing the plunger from the chamber to create an air pocket in the chamber adjacent the distal end. The air-in-tip mechanism includes a gripper ring that is positioned within the injector body and initially oriented to allow the plunger to move freely through the gripper ring. A user operable button is attached to the gripper ring to first tilt the gripper ring until it engages the plunger and then move the plunger proximally to create the air pocket. Alternatively, a face cam and push rod assembly can be activated when the injector's locking nut is turned to automatically tilt and move the gripper ring.

Abstract: A portable insulin delivery device that supplies insulin in a pre-pressurized chamber, passes the insulin through a pressure-dropping labyrinth to a flow control valve. The valve is activated by a piezoelectric actuator. This allows for precise insulin delivery. An electronic package provides for programming of basal rates and bolus. A pressure sensor relays data concerning normal operation and pressure changes that indicate problems. The processor, keypad, display, power source, fluid pressure sensor and fluid flow control actuator are housed in a base unit. A removable cartridge unit houses the pre-pressurized fluid reservoir, flow path labyrinth, and flow control valve.

Abstract: A delivery device for delivering a substance intradermally into the skin of a patient including a housing for contacting the surface of the skin and a disposable cartridge to be received in the housing. The cartridge includes an internal reservoir containing a substance to be delivered to the patient, a plurality of micro skin penetrating members and a fluid channel extending between the micro skin penetrating members and the reservoir. The housing includes a bottom wall with a central opening and a cover member. The cartridge is positioned in the housing with the micro skin penetrating members extending through the central opening of the bottom wall and positioned on the surface of the skin of a patient. The cover is closed onto the cartridge to dispense the substance from the cartridge through the micro skin penetrating members and into or through the skin of the patient.

Abstract: An automatic medicament delivery device and corresponding method for use with a standard needle assembly and a standard vial container that contains a medicament is disclosed. A user attaches the needle assembly and the vial container to the device. The user can transfer and measure a dose from the vial container into the device. When the user presses the tip of the device against the injection site, a needle of the needle assembly is automatically injected into the user and the measured dose is delivered into the user through the needle. When the user removes the device from the injection site, the device is re-cocked for the next injection.

Abstract: A system and method for delivering drug solutions to a user, the system having a housing with a drug reservoir therein. The system also includes an activation assembly having a delivery needle and an activation device for activating delivery. The system further includes a pump, associated with the drug reservoir and a flow restrictor. When activated, the pump moves the drug out of the drug reservoir through the delivery needle and into the skin of the user. The pump may be in the form of a spring.

Abstract: An injection device has a housing (50, 60) and therein a spring for storing energy for an injection operation. The spring (94) impinges, in the proximal direction, upon an ejection member (92) for ejecting injection liquid (16) from a vessel, displaceably arranged in the housing, at whose proximal end an injection needle is attached. Located in the housing is a displacement member (36), displaceable in the longitudinal direction, for displacing the vessel (14) in the proximal direction, in order to effect a movement of the injection needle (18) in the proximal direction and, thus, its insertion. Provided on the ejection member (92) is a detent lug (100), associated with which is a corresponding detent opening (102) in the displacement member (36). A control member (70), effective in travel-dependent fashion, serves to disengage the detent lug (100) from the detent opening (102) when the displacement member (36), during the injection operation, has traveled a predefined distance in the proximal direction.

Abstract: A fluid injection arrangement, in the context of patient imaging systems, in which phases of contrast medium injection and flushing medium injection can be freely and selectably ordered so as to make available to the operator and patient a vast array of possible protocols that has hitherto been essentially unattainable. Also contemplated is the use of a “hold” phase, involving an indefinite pause between phases of a protocol, in connection with such imaging systems. Further contemplated is the use of a “pause” phase in which a pause of fixed duration is pre-programmed into the protocols of MRI injector systems.

Abstract: A hypodermic needleless injection system for injecting a liquid medication, which system comprises:

Abstract: Disclosed is an infusion pump and a fluid container for expelling a fluid from the fluid container to a patient. The pump comprises a housing having a chamber therein for receiving the fluid reservoir. A first wall is provided on the housing for contacting the fluid reservoir, and a second wall is movable from a first position distanced from the first wall to form the chamber therebetween, and a second position relatively closer to the first wall. Advancing the movable wall from the first position to the second position expels fluid from the collapsible reservoir. Preferably, the first and second walls are provided with non-planar complementary surface configurations for contacting the collapsible reservoir. Retraction mechanisms for retracting the movable wall from the second position to the first position, and user readable indicium of the status of the dispensation cycle are also disclosed.

Abstract: The present invention relates to improvements on automatic injection devices, in particular for self-administered drug therapies, providing for a high degree of internal stability of the syringe and, therefore, of the associated needle, thanks to a series of elastic wasp-waisted elements and a mobile tip made of a transparent material in the preferred embodiment, which besides enabling the regulation of the length of projection of the needle during the injection also allows the user to see the exact spot where the needle will enter the flesh.

Abstract: A liquid medicine self-administration device which is capable of administering a liquid medicine to a patient in a single shot and with which the refilling of the liquid medicine can be performed by a one-touch operation. The device includes a casing 1 having two open ends, a port portion 2 closing one of the open ends of the casing, a reservoir 3 attached to the port portion 2 and capable of being easily deformed by pressing and of being restored to its original shape. A pushing means 4 is slidably inserted into the other open end of the casing 1 and is adapted to press and deform the reservoir 3. The pushing means 4 comprises a cylindrical member 41 inserted into the casing 1 so as to be able to slide along the inner wall of the casing 1 and a spring 42 housed within the cylindrical member 41.

Abstract: An injection device has a drive spring which, when released, urges a loaded capsule forwards to project its needle from the end of a barrel and ejects the dose. A light return spring then retracts the needle. The drive spring acts on the capsule plunger through a drive member having a movable barrier against which the rear end of the plunger initially abuts. A first trigger releases the drive member and drive spring and after an injection a second trigger can be actuated to shift the barrier relative to the drive member and allow the return spring to act.

Abstract: A autoinjector type syringe apparatus is provided for injecting a liquid medicine or like into a patient. The apparatus includes a housing that is of two parts including a transversely extending upper housing and a downwardly extending vertically oriented lower housing. A syringe barrel is supported by the housing and has an interior for holding a liquid medicament for being dispensed. A piston is slidably disposed within the interior of the syringe barrel for injecting the medicament from the barrel, the piston being movable between retracting and dispensing positions. A cam member supported by the housing for operating the piston to move between retractive and dispensing positions, the cam being movable between loaded and dispensing positions. The housing includes an upper transversely extending section with an external surface and a cocking mechanism that includes an externally positioned handle that slides on the outer surface of the upper portion of the housing.

Abstract: A dispensing device, such as a needleless injector, comprising a spring, which provides an energy store, and a dispensing member movable, to effect a dispensing, under the force of the spring. A latch has a first position in which it restrains movement of the dispensing member and a second position in which it permits such movement. A trigger is operable by the user for moving the latch from the first position to the second position. A safety mechanism, preferably in the form of an appropriately shaped slot in the dispensing member, is effective before the device has been completely assembled to prevent movement of the latch to the second position.

Abstract: A loading mechanism for a medical injector assembly is disclosed. The loading mechanism according to the present invention includes a dosing sleeve slidingly joining first and second injector housing portions and having tabs at a first end and fixed to one of the first or second housing portions at a second end; and a sleeve retainer fixed to the other of the first or second housing portions and engageable with the tabs of the dosing sleeve at an engagement point to prevent movement of the dosing sleeve once an injector plunger is at a rear portion of an injector fluid chamber, wherein movement of the first housing portion away from the second housing portion moves the plunger in a second direction to load fluid into the fluid chamber and movement of the first housing portion toward the second housing portion moves the plunger in a first direction to remove the fluid from the fluid chamber. The disclosed loading mechanism facilitates filling the assembly with medicament and priming the assembly for use.

Abstract: A reloadable auto-injector including a housing portion (1, 101) designed to receive a syringe (3), and a cover portion (2, 102), the auto-injector incorporating an injection device for automatically injecting the substance contained in the syringe, the injection device comprising: a piston (21) comprising a high portion (21b) and a low portion (21c), the low portion (21c) co-operating with the plunger of the syringe, the piston (21) being mounted to move, under the effect of an actuating spring (22) between a cocked position and an end-of-stroke position, the spring (22) being compressed in the cocked position; and trigger means (19) mounted to move between a blocking position in which they hold the piston (21) in its cocked position, and a releasing position in which they release the piston (21), the trigger means (19) being released from their blocking position by an actuating member; the auto-injector being characterized in that it further includes recocking means for recocking the automatic injection devi

Abstract: An injector is provided for automatic placement of a subcutaneous insertion set such as an infusion set or the like used for delivering a selected medication to a patient. The injector comprises a spring-loaded plunger having a head for receiving and supporting the insertion set in a position for placement of a medical insertion needle through the skin of a patient at a selected insertion site. The plunger head includes a safety lock mechanism for engaging and retaining the insertion set during spring-loaded advancement with a controlled force and speed toward the patient's skin to transcutaneously place the insertion needle. When the plunger head reaches a fully advanced position, with the insertion set placed on the patient, the insertion set is releasible from the safety lock mechanism with minimal force to permit quick and easy separation of the injector.

Abstract: A device is disclosed which aids in the stabilization of veins for puncturing. A device body is disclosed which may be constructed of any suitable lightweight and durable metal or resinous material which may be easily cast or formed and which possesses properties of strength and resiliency. A handle with a grip extending outwardly from the device body when said device is in the operative position may be engaged by a user's thumb or forefinger to stabilize the device body during use. A pair of elongated flanges displaced outwardly from the centerline of the device, spaced apart a selected distance, and terminating in contact surfaces, may be placed such that the subject vein may extend through a space present between the contact surfaces of the elongated flanges.

Abstract: A jet injector system for injecting fluid into a body. The jet injection system includes capsules for holding the material to be injected, apparatus for applying force to the capsule(s) to eject the injection material(s) and a perforator for directing the jet stream for the respective materials into the body. A flyweight system is described for developing jet injection pressures, and latching devices control the flyweight system. An injector system for injecting more than one fluid is described.

Abstract: A self-administration device for liquid drugs, which can be filled in a short time without troubles such as leakage and is capable of a pushing operation in one-touch. The self-administration device for liquid drugs includes a casing 1; a port portion 2; a reservoir 3 having an open end which is closed by the port portion 2 and is capable of being restored to its original shape; and pushing means 4 for pushing the reservoir 3, wherein the reservoir 3 is pressed by the pushing means 4 to inject the liquid drug. The pushing means 4 includes a cylindrical member inserted slidably into the inner wall of the casing 1, and a spring member housed in the cylindrical member. The cylindrical member and the port position 2 are respectively provided with a male hook 425 and a female hook 25, for acting as detachable mutual engagement means.

Abstract: The invention relates to an apparatus for injecting the body of humans or animals with a pharmaceutical preparation, wherein the preparation is arranged in a rigid carrier, wherein the apparatus comprises: a chamber into which the carrier can be transported; and a channel connecting onto the chamber for transporting the carrier into the body comprising fixation means for fixing the end of the channel relative to the skin of the body for injecting in order to prevent a movement of the channel in the direction perpendicularly of the axis of the barrel. According to one embodiment the fixation means are formed by chamfered protrusions formed on the part adapted for contact with the skin of the body and extending substantially in the direction of the axis of the channel.

Abstract: A device for delivering a liquid theraputic preparation into the body of a patient by injection into or through the skin of the patient comprises a low-profile housing having a bottom surface adapted to be brought into contact with the skin of the patient. A reservoir is disposed within the housing for containing a liquid theraputic preparation to be administered. An injection needle is disposed generally horizontally in the housing, and is adapted to communicate with the reservoir. The injection needle has a bent injection end which is adapted to project through a needle aperture in the bottom surface of the housing. A movable needle carrier is disposed in the housing for carrying the injection needle and for causing the injection end of the needle to project through the needle aperture upon movement of the needle carrier.

Abstract: A device for applying a biasing force to a syringe. The syringe is of the type having a barrel, a cannula at one end of the barrel and a piston that extends into the barrel. The biasing device includes a collar element that defines an aperture. The collar element passes over the cannula and abuts against the syringe barrel, wherein the cannula passes through the aperture in the collar element. A cap element is provided that is adapted to engage the piston of the syringe. A plurality of biasing elements extend between the collar element and the cap element. The biasing elements supply a biasing force between the cap element and the collar element that bias the cap element and the collar element toward one another. The biasing force applied between the cap element and the collar element compress the syringe and drive the piston further into the syringe.

Abstract: A syringe apparatus includes a housing having upper and lower end portions and a hollow interior. A rotary cam position inside the hollow interior has a projecting portion for operating a cartridge when the apparatus is used. The housing has a rotary bearing for supporting the cam. A syringe cartridge (single chamber or dual chamber) removably fits the housing interior, the cartridge including a barrel with at least one chamber for containing medicine to be dispensed and a dispensing orifice. The cartridge includes a piston having an upper plunger that engages the cam. The piston slides within the barrel chamber forcing contained medicine through the dispensing orifice (e.g., needle) during use. The upper plunger end of the piston engages the rotary cam during dispensing. The cam is movable between first and second positions, the second position being a dispensing position that positions the projecting portion of the cam at the piston. A spring urges the cam to rotate from the first to the second position.

Abstract: An injector is provided for automatic placement of a subcutaneous infusion set or the like used for delivering a selected medication to a patient. The injector comprises a spring-loaded plunger having a head for receiving and supporting an infusion set in a position for placement of an insertion needle and related cannula through the skin of a patient at a selected insertion site. The plunger head includes a safety lock mechanism for engaging and retaining the infusion set during spring-loaded advancement with a controlled force and speed toward the patient's skin to transcutaneously place the insertion needle and cannula. When the plunger head reaches a fully advanced position, with the infusion set placed on the patient, the infusion set is releasible from the safety lock mechanism with minimal force to permit quick and easy separation of the injector.

Abstract: A device for automatically injecting a material into the body is disclosed. The device includes a drive assembly and a disposable assembly including a syringe which is mounted to the drive assembly. The drive assembly includes a drive rod, a driver releasably coupled to the drive rod, and a spring which urges the drive rod towards the syringe assembly. The spring first urges the coupled drive rod and driver along the axis of the device, causing the skin to be penetrated by the needle of the syringe assembly. The drive rod is then decoupled from the driver. The spring continues to urge the drive rod in the axial direction, whereby the drive rod engages a piston in the syringe assembly and causes the displacement of the material therein. A cap is removably mounted to the disposable assembly. Locking members on the cap and disposable assembly prevent removal of the cap until the disposable assembly is moved to the firing position within the drive assembly.

Abstract: A receptacle receives and at least partially contains a container that contains fluid. The receptacle, or the receptacle in combination with the container, defines an inflation device. The inflation device is associated with the container so that when the inflation device is inflated the fluid is forced from the container. Subsequent to the proper positioning of the container relative to a human cavity, the inflation device is inflated by operating an activation device such as a switch or a valve. The activation device is preferably distant from the container and receptacle such that the activation device can be easily accessed and operated. Alternatively a spring is associated with the receptacle. The spring is compressed and a retention device operates to maintain the spring in the compressed configuration. Once the container and receptacle are properly positioned relative to a cavity, the retention device is acted upon to release the spring.

Abstract: A novel fluid infusion system utilizing a fluid pump device and a syringe is used in an intravenous or infusion application of a liquid product, such as a medication, to a patient. The pump device includes a housing that has a compartment for reception of at least a portion of the plunger of the syringe. A drive component is disposed in the compartment and is relatively movable with respect to the housing for engaging and producing movement of the plunger. A fluid medium is contained within the housing and a relatively movable piston is in operative communication with the fluid medium and a biasing structure is provided for biasing the piston in a first direction to impart a force on the fluid medium. A metering orifice is in communication with the fluid medium and through which the medium can pass upon movement of the piston in the first direction to restrict and control the flow of the medium.

Abstract: The injector has a reservoir containing a drug. The injector has a tubular body with a tubular wall, a plunger, a needle and a plunger rod. The tubular body also has two springs. The first spring is compressed from bearing on a part of the inner surface of the tubular body and on a piece that is connected to the plunger rod. The first spring pushes in the direction in which the needle protrudes. The second spring acts in the opposite direction of the first spring. The second spring is compressed by bearing on a part of the inner surface of the injector body and on a ring. The force exerted by the second spring is greater than that exerted by the first spring. The ring is slidably mounted and is capable of entraining the reservoir in the direction of the retraction of the needle. The ring is blocked by a movable abutment. The plunger rod cooperates with the movable abutment to release the second spring and cause the retraction of the needle.

Abstract: An infusion pump for infusing a medical treatment fluid intravenously to a patient includes a collapsible treatment fluid bag juxtaposed with an inflatable drive fluid bladder confined between a pair of opposing containment members which cause the bladder to impinge against the bag as the bladder is inflated. A drive fluid pump controllably inflates the bladder, thereby displacing treatment fluid from the bag into an outlet tube affixed thereto which conveys the treatment fluid to the patient where it is received intravenously. The treatment fluid flow rate through the tube is controlled by increasing or decreasing the drive fluid pump output and consequently the pressure in the bladder in response to a pressure sensor in fluid communication with the bladder. Alternatively, the treatment fluid flow rate is adjusted by opening or closing the outlet tube by means of an occluder or restrictor positioned along the tube.

Abstract: An injection device is provided for the infinitely variable metering and administering of a liquid preparation from a multi-dose injection cartridge having a rear piston which may be moved forward by means of a piston rod. The longitudinal movement of the piston rod is governed by two couplings arranged along the piston rod and each being capable of releasably gripping the piston rod by a locking device. The piston rod has a wedge-shaped cross section and each of the couplings includes a clamping shoe which has a wedge-shaped groove, the cross section of which is adapted to that of the piston rod, and locking device, by which the piston rod and each clamping shoe may be releasably clamped together to lock the piston rod in the groove of said clamping shoe.

Abstract: A syringe driver device is able to effect the controlled, parenteral infusion of a medical fluid using an available disposable syringe. The driver device includes a frame heaving a movable carriage, which houses a force applying element, mounted thereto. A disposable syringe mounts upon the frame and a lengthy microbore tubing attaches to the outlet tip of the syringe. As a force is applied to the syringe plunger, fluid is expelled from the syringe, but its flow rate is dependent upon the diameter of the microbore tubing. The driver device enables the delivery of multiple, sequential doses of fluid.

Abstract: An infusion pump for providing a pressurized liquid flow from a collapsible, deformable reservoir bag includes a magnetically actuated pressurizing member that applies a pressure to the bag in response to the force of magnetic attraction applied by a magnet. In several embodiments, a bag is seated on a platen of magnetizable metal, and a magnet with a compressing surface is mounted for movement toward and away from the platen. As the magnet is moved toward the platen by the force of magnetic attraction, the bag is pressurized between the magnet and the platen. The magnet may be spring biased either toward or away from the platen to alter the relationship between the decreasing volume of the bag and the pressure applied to it, by compensating in a known manner for the change in the magnitude of the magnetic force with the distance between the magnet and the platen.

Abstract: A reloadable automatic or manually usable medicine injection apparatus having a barrel which receives a syringe subassembly. The syringe subassembiy includes an ampule for housing fluid medication, a needle, a plunger stopper, and plunger shaft which allow removal and manual use. The injection apparatus includes a driver for forcing the syringe subassembly to inject the needle and displace fluid medication. The injection apparatus preferably includes a trigger handle, sheath remover, and removable stop system for delivery of multiple doses.

Abstract: An injection device is adapted to eject a sequence of doses from the needle of a capsule carried within its barrel-like body. A plunger extending rearwardly from the capsule has ratchet teeth along its length engaged by pawls at the forward end of a drive tube biased forwardly by a spring. The capsule is in a sleeve-like carrier having limited longitudinal travel, a lost motion connection to the drive tube and an engagement with the ratchet teeth by pawls. The drive tube can be releasibly retained in a rearward position by a trigger mechanism. When released, the drive tube urges the plunger, capsule and carrier forwards to project the needle. The liquid acts effectively as a solid. With the carrier stopped, the plunger carries on to eject a dose, clicking past the carrier pawls. The re-prime, the knob is pulled to retract the drive tube and the carrier, the lost motion connection allowing the drive tube to move further and have its pawls click back along the plunger until the trigger mechanism re-engages.

Abstract: An implantable drug delivery apparatus including a housing that has a housing chamber. An outer deformable body having a reserve chamber is mounted within the housing chamber. An inner deformable body having a dispensing chamber is mounted within the reserve chamber. A dispensing valve is actuated to an open position to allow a fluidic drug to flow from the dispensing chamber, through the dispensing valve and through a catheter into a body of a patient. The fluidic drug is discharged from the dispensing chamber at a dispensing mass flowrate which is greater than a refilling mass flowrate of the fluidic drug passing from the reserve chamber to the dispensing chamber, when the dispensing valve is in an open position.

Abstract: An injection device holds a syringe in the form of a capsule having a needle projecting from its forward end and a plunger extending from its rear end. The rear end of the plunger received in the drive member, which, when released, is urged forward by a coil spring, thus projecting the needle and expressing the dose. The drive member is held captive in its rearward primed position by a detent provided by the body of the device. A sleeve covering a substantial part of the body can shift longitudinally of it from an initial rearward position to a forward position in which it either disengages the drive member from the detent, or in which a trigger is freed from actuation to release the drive member.