Abstract: System for supplying hydraulic pressure to a bolt elongation tool, comprising the bolt elongation tool with at least one pressure chamber and a tool piston, a hydraulic medium supply system and a hydraulic actuator with an actuator cylinder housing an actuator piston. The actuator cylinder is attached to the at least one pressure chamber, wherein the hydraulic actuator is an electro-hydraulic actuator comprising an electric motor built to generate the power of the electro-hydraulic actuator, and wherein the actuator piston is built to supply, with one stroke of an actuator stroke height of the actuator piston, at least the amount of hydraulic pressure that is needed to move the tool piston for the amount of one tool stroke height of the tool piston.

Abstract: A medical injector including at least one syringe port for engaging at least one syringe and having a locking mechanism. The locking mechanism enables the syringe to self-align with the syringe port for locking engagement upon insertion of the syringe into the syringe port and to axially eject the syringe from the port upon rotational disengagement of the syringe from the port.

Abstract: The present invention relates to a displacement device, DD, for providing a displacement of a syringe closure system for a syringe relative to the syringe, a testing device, TD, and a method for leakage testing of a connection of a syringe closure system for a syringe with the syringe.

Abstract: A liquid medicine administration device includes: a cylinder filled with a liquid medicine, a gasket located inside the cylinder; an advancing mechanism configured to advance the gasket in a distal direction; a drive mechanism including a motor configured to drive the advancing mechanism; a battery configured to supply power to the motor; and a control unit configured to control a rotational speed of the motor. In a first movement period that is an initial sliding period included in an advancing movement of the gasket in the cylinder, a cycle including one continuous rotation and one continuous stoppage of the motor is repeated two or more times.

Abstract: Method and device to inject fluid into animals through a sterile needle, requiring control of fluid volume, flow rate of injection, accuracy of injection site, depth of penetration, disposal administration of consumable materials and quality control of the fluid and fluid administration using a portable applicator controlled by an external software controlled pump and controller system used in administering fluid medications, organic castration compounds and other fluids to be administered to live animals.

Abstract: An Infusion device (1) for administering a medical fluid to a patient, comprises: a housing (10); a receptacle (11) arranged on the housing (10) for receiving a syringe (2); a pusher device (12) movable in a pushing direction (P) for acting onto a piston (21) of a syringe (2) received on the receptacle (11); a drive element (13) connected to the pusher device (12), the drive element (13) being longitudinally movable relative to the housing (10) for moving the pusher device (12) along the pushing direction (P); a driving rod (14) having a screw thread (140) and being rotatable about a rotational axis (R1); an electric drive device (141) for rotating the driving rod (14); a clutching device (130) connected to the drive element (13) and being actuatable, by an actuation device (15), to engage, in a clutched state, with the screw thread (140) of the driving rod (14) for translating a rotational movement of the driving rod (14) into a longitudinal movement of the drive element (13) along the driving rod (14), and

Abstract: An automatic jet injector for administering tissue is provided with a housing including a grip and a pushbutton; a syringe positioning device on a top of the housing and including an intermediate support and a rear pushing board having a lower through hole and a threaded hole under the through hole; a power source in the housing and including a power supply configured to supply power to the power source by pressing the pushbutton; a fastening member in the housing and being adjacent to a rear end of the housing; a positioning member being adjacent to the power source; a reciprocating screw having a front end operatively connected to the power source and a rear end fastened in the fastening member; a rod having a front end fastened in the positioning member and a rear end fastened in the fastening member; and a control device.

Abstract: This drive screw device is provided with: a drive screw; a drive unit which causes the drive screw to rotate; a slider which moves along the drive screw by means of the rotation of the drive screw; and an external load which is provided on the drive screw and applies a rotational load to the drive screw. By this means it is possible to provide a drive screw device with which there is little pressure variation even if a frictional force varies.

Abstract: A wearable medication injecting device which is worn on a patient's body and adapted to automatically administer medication to the patient via a scheduled injection, the device comprising a detachable medication module containing the medication and a needle, a medication injection assembly having a mounting plate with at least one attachment point for removably engaging the detachable medication module, and a band which secures the mounting plate against the patient's skin surface. The needle is adapted to pass through the mounting plate to penetrate the skin surface and deliver the medication. Replacing the detachable medication module both replenishes the medication and replaces the needle, and attaching additional detachable medication modules allows a second medication to be simultaneously administered. A user control device is adapted to wirelessly communicate with the medication injection assembly to control the scheduled injections and convey device status alerts to a user.

Abstract: Ambulatory infusion pumps, pump assemblies, and baseplate assemblies, including cartridges, baseplates, cannulas, inserters, and related components and batteries therefor, as well as component combinations and related methods.

Abstract: An introducer set (1) for providing vascular access in a patient's body comprises an introducer sheath (10) and a dilator (20). The introducer sheath (10) has a tubular body (11) made of flexible material with a distal portion (12), a proximal portion (13) and an inner surface, the proximal portion (13) being configured to be inserted into a patients vessel to allow a medical device (100) to be inserted through the introducer sheath (10) into the patient's vessel. At least one of the dilator (20) and the introducer sheath (10) comprises a stiffening structure (25) imparting stiffness to the tubular body (11) of the introducer sheath (10), wherein said stiffening structure (25) can be released, removed or otherwise deactivated.

Abstract: An automatic administration instrument includes a syringe and a partition wall in the syringe which partitions the syringe into different rooms for respectively holding plural kinds of drug solutions or a drug and a drug solution. A partition-wall driver displaces the partition wall and an injection needle is connected to the syringe. A body cap attached to the administration instrument body so as to cover the injection needle. The syringe, the partition wall, and the body cap are configured such that displacing the partition wall dissolves or mixes the drug solutions or the drug and the drug solution in a state that the injection needle is covered by the body cap.

Abstract: A computerized electro-mechanical drug delivery device configured to deliver at least one dose of two or more medicaments. The device comprises a control unit. An electro-mechanical drive unit is operably coupled to the control unit and a primary reservoir for a first medicament and a secondary reservoir for a fluid agent, e.g. a second medicament. An operator interface is in communication with the control unit. A single dispense assembly is configured for fluid communication with the primary and the secondary reservoir. Activation of the operator panel sets a first dose from the primary reservoir and based on the first dose and a therapeutic dose profile, the control unit is configured to determine a dose or range of the fluid agent. Alternatively, the control unit determines or calculates a dose or range of a third medicament. Further, a dispense interface for use with a drug delivery device is disclosed.

Abstract: A computerized electro-mechanical drug delivery device configured to deliver at least one dose of two or more medicaments. The device comprises a control unit. An electro-mechanical drive unit is operably coupled to the control unit and a primary reservoir for a first medicament and a secondary reservoir for a fluid agent, e.g. a second medicament. An operator interface is in communication with the control unit. A single dispense assembly is configured for fluid communication with the primary and the secondary reservoir. Activation of the operator panel sets a first dose from the primary reservoir and based on the first dose and a therapeutic dose profile, the control unit is configured to determine a dose or range of the fluid agent. Alternatively, the control unit determines or calculates a dose or range of a third medicament. Further, a dispense interface for use with a drug delivery device is disclosed.

Abstract: An infusion system for sonothrombolysis treatment uses a syringe loaded with a microbubble solution and operated by a syringe pump to deliver the microbubble solution to a subject during sonothrombolysis treatment. To prevent the stratification of the microbubble solution in the barrel of the syringe during treatment, the barrel also contains a plurality of magnetic beads which are agitated into semi-random patterns of motion in the syringe chamber during the procedure. The magnetic beads are moved by magnetic attraction and repulsion from the moving magnets of a magnetic stirrer mounted in proximity to the syringe during treatment.

Abstract: A pen includes a carpule having a longitudinal axis, a first end with a dispensing opening closable by a closure part, a second end via which at least one stopper can be inserted in the direction of the longitudinal axis, and an interior that is tightly closed by the closure part and the at least one stopper. A pen housing has a central axis, receives the carpule, and has a piston rod that interacts with the at least one stopper and a drive for moving the at least one stopper within the interior of the carpule, wherein the second end of the carpule can be inserted into the housing.

Abstract: Described is a syringe carrier comprising a body adapted to receive a barrel of a syringe. The body includes two sections having distal ends with shoulder sections. The shoulder sections are adapted to engage a circumferential gap between the barrel of the syringe and a needle shield covering a needle of the syringe.

Abstract: A liquid dispensing pump includes a lead screw having a lead screw shaft extending along a lead screw axis, and the lead screwing is operably connected to a piston connected to a liquid reservoir. A thrust bearing is connected to the lead screw and configured to support an axial force on the lead screw when dispensing liquid. A magnet is engaged to the thrust bearing so as to move in response to the axial force on the lead screw. A magnetic transducer is mounted in proximity to the magnet and configured to generate an output signal in responsive to the magnet move.

Abstract: A syringe and device for rapidly loading and releasing the syringe. A limiting flange and clamping flange are on a connection end of the syringe. The clamping flange is proximate to a rear end of the connection end and includes at least two clamping portions. The device includes an injection head, pushing ring, guide sleeve, and at least two bayonet locks. The bayonet locks are on the injection head by first elastic structures flexible along a radial direction. One end of the pushing ring stretches into the guide sleeve. A second elastic structure is between the pushing ring and guide sleeve. The other end of the pushing ring faces sides of the bayonet locks. Bump components are disposed on sides of the bayonet locks, with bump slots corresponding thereto. Clamping slots for insertion of the clamping portions are on an end face of the pushing ring.

Abstract: A fluid reservoir for a fluid infusion device is provided. The fluid reservoir includes a first portion that has a first end and a second end. The first end includes a fluid delivery port and at least one bubble retaining feature adjacent to the fluid delivery port. The fluid reservoir includes a second portion received in the second end of the first portion and movable within the first portion from the first end to the second end. The fluid reservoir defines a fluid chamber between the first portion and the second portion.

Abstract: A drive mechanism of a drug delivery device for setting and dispensing of a dose of a medicament includes a housing, a piston rod, a dose indicating member with a dose size information thereon, and a drive wheel. The piston rod engages with a piston of a cartridge for displacing the piston in a distal direction. The dose indicating member is connected to a spring element and is rotatable in a dose incrementing direction against the action of the spring element for setting a dose. The drive wheel is operably engaged with the piston rod for displacing the piston rod in the distal direction for dose dispensing. The dose indicating member is engageable with the drive wheel during dose dispensing to transfer a force to the drive wheel when driven by the relaxing spring element in a dose decrementing direction.

Abstract: A cyclic aperture flow regulator system has an adjustable fluid aperture in a fluid path connecting the aspiration port of a surgical probe with a vacuum source. The cross-sectional area of the fluid aperture can be modified by an actuator. The actuator is controlled to modify the cross-sectional area of the adjustable fluid aperture in cycles. During each cycle, the fluid aperture cross-sectional area is substantially reduced or closed. The cycles occur at a rate fast enough to produce a substantially steady flow, with minimum flow ripple and pressure ripple.

Abstract: Apparatus is described for administering a substance to a subject. A vial contains the substance and a stopper is disposed within the vial and is slidably coupled to the vial. A first threaded element is (a) rotatable with respect to the vial and (b) substantially immobile proximally with respect to the vial during rotation of the first threaded element. A second threaded element is threadedly coupled to the first threaded element. At least a distal end of the second threaded element is substantially non-rotatable with respect to the vial, and the distal end of the second threaded element defines a coupling portion that couples the second threaded element to the stopper. The first threaded element, by rotating, linearly advances the stopper and at least the distal end of the second threaded element toward a distal end of the vial. Other embodiments are also described.

Abstract: A manually operated medicament infusion device is provided. The device is capable of delivering an accurately controlled volume of medicament with reliability. Additionally, the device includes a battery-operated indication device for tracking the number of doses of medication delivered. Optionally, the device includes a ratchet and pawl to prevent inadvertent dispensing of medicament.

Abstract: An automatic applicator of injection is described, which is equipped with a programmable electronic module that activates a first linear motor (ML1) which axially displaces an arm (13) of the proximal end (11) to the fixed head (20) placed at the distal end of the housing (10), said arm (13) which compresses a cartridge (15) fitted in the chamber (12) formed between the head (20) and the free end of the arm (13) so as to gradually expel the fluid stored in the cartridge; and a second linear motor (ML2) actuated concurrent with the first linear motor (ML1), said second linear motor (ML2) retreating an arm (60) with a dragger (61) which slides axially a suction chamber (30) toward the intermediate portion of the housing (10) and contiguous to the outer surface of the inner chamber (12), gradually exposing the needle tip (50) for application of the injection.

Abstract: Drug delivery device adapted to receive a cartridge, comprising a drive tube with an inner thread, a motor assembly comprising a drive shaft and being adapted to be received inside the drive tube, a drive member attached to the drive shaft and with an outer thread in engagement with the drive tube inner thread. The drive tube is arranged axially displaceable but non-rotational relative to the motor assembly, whereby rotation of the drive member results in axial, non-rotational displacement of the drive tube. To provide flexibility the drive shaft is connected to the drive member via a first flexible joint, and the motor assembly proximal portion is connected to a support structure via a second flexible joint.

Abstract: A drive mechanism for a medication delivery device includes a motor, a housing, a gear cover, a gear transmission system, a helical transmission system, and a sensor system. The helical transmission system includes a plug, a screw shaft, and a sliding block connecting the plug to the screw shaft. The gear transmission system includes a first gear disposed on an output shaft of the motor and a second gear disposed on one end of the screw shaft. Dual gears interconnect the first and second gears. The motor drives the plug along a linear path by rotating the screw shaft via the gear transmission system, causing the sliding block to move along the screw shaft. The sensor system monitors the driving process. The plug provides the force required to effect the dosing of the medication.

Abstract: A delivery unit (2) of a drug delivery device (1), the delivery unit (2) comprising a subcutaneous delivery mechanism (9) having a subcutaneous delivery member (92), and a subcutaneous delivery member actuation mechanism (10) being operable to move the subcutaneous delivery member (92) between a retracted position and an extended position. The actuation mechanism (10) comprises a rotary member (102) having an engagement member (104) rotatable relative a support member (14), and an actuator (106) comprising a pivot portion (10A) and an engagement portion (10B) pivotally connected to the support member via the pivot portion. The engagement member (104) and engagement portion (10B) are configured to engage upon rotation of the rotary member to pivot the actuator between first and second positions and to thereby move the subcutaneous delivery member (92) between the corresponding retracted and extended positions. In an embodiment, the needle actuation mechanism may comprise a reuse protection.

Abstract: A liquid administration device includes a structure that includes an accommodation body configured to accommodate liquid therein and a needle configured to communicate with an inside of the accommodation body; an operation unit configured to discharge the liquid inside the accommodation body from the needle by moving toward the structure in a distal direction; a cover member that is movable between a protection position at which the needle is covered and an exposure position at which the needle is exposed; a first biasing member that biases the operation unit toward the structure in the distal direction; and a second biasing member that biases the cover member in the distal direction. The operation unit has a first contact portion and the structure has a second contact portion, the contact portions being configured to come into contact with each other when the operation unit moves toward the structure in the distal direction.

Abstract: A system and method of managing workflow for a variety of injection procedures preferably includes a display that provides a graphical representation of the steps required to initiate an injection procedure. The system can, for example, set forth a suggested order or sequence for the steps to be completed, and display the suggested sequence of steps graphically. Various steps may optionally require completion of ancillary operations as a requirement for completion of the selected step.

Abstract: Micro-volume devices, systems, and associated methods that facilitate the injection or aspiration of precisely controlled volumes of materials at precisely controlled rates are provided. In one embodiment, a micro-volume device includes a syringe and a lead screw connected to a plunger of the syringe. A mechanical interface is connected to the lead screw and includes a first set of cams adjacent a proximal portion and a second set of cams adjacent a distal portion. A mechanism is configured to oscillate a structure in a direction parallel to a longitudinal axis of the lead screw such that one or more projections of the structure to alternatively engage cams of the first and second sets of cams in a manner that results in rotation of the mechanical interface in a single direction for highly controlled linear displacement of the plunger.

Abstract: The present invention is directed to a drug delivery device with a drive mechanism including a piston rod with a bearing for driving a bung in a cartridge in a distal direction. A movable element is disposed displacably in an axial direction within the drive mechanism. The moveable element is movable between a first position in which a distal end of said movable element protrudes from said bearing and a second position in which a distal end of said movable element lies flush with the distal end of said bearing. The invention is further directed to a method for detecting the contact between the bearing and the movable bung.

Abstract: A system and method for releasably coupling a fluid dispenser to a structure. There is a push to connect-pull to disconnect connector system that has first and second mating connectors. A first connector is mounted to the dispenser and a second connector is mounted to the structure. The connector system accomplishes both mechanical and electrical interconnection between the dispenser and the structure.

Abstract: A syringe fill system is described, which is useful for filling syringes for dental anesthetic applications. The system incorporates capability for “push-pull”, “pull-push”, “push-push”, and “pull-pull” modes of operation, for loading syringes with compositions comprising multiple fluid components. A syringe fillable by such syringe fill systems is described, providing haptic and audible feedback to a user, to aid in administering precise amounts of therapeutic compositions. Also disclosed are cassette assemblies for use in such syringe fill systems. Such cassette assemblies may be formed of plastic and elastomeric materials of construction, as disposable or single-use components of the syringe fill system.

Abstract: An apparatus for dispensing droplets comprises a dispensing tip with an orifice having a cross sectional area in the range of 0.00002 mm2 to 0.03 mm2. An actuator assembly comprising an actuator element engages with and disengage from the tip and, when engaged, couples acoustic energy to liquid in the tip to expel the liquid through the orifice as a droplet. The actuator assembly includes one or more piezo elements, which may be in the form of piezo stacks. In some embodiments, the actuator assembly comprises a plurality of jaws adapted to move to engage with the dispensing tip for dispensing. This allows side loading of the tip followed by movement of the actuator assembly to engage the tip.

Abstract: A syringe fill system is described, which is useful for filling syringes for dental anesthetic applications. The system incorporates capability for “push-pull”, “pull-push”, “push-push”, and “pull-pull” modes of operation, for loading syringes with compositions comprising multiple fluid components. A syringe fillable by such syringe fill systems is described, providing haptic and audible feedback to a user, to aid in administering precise amounts of therapeutic compositions. Also disclosed are cassette assemblies for use in such syringe fill systems. Such cassette assemblies may be formed of plastic and elastomeric materials of construction, as disposable or single-use components of the syringe fill system.

Abstract: An infusion pump for administering controlled doses of a fluid comprises: a receptacle (2) for storing the fluid (6), the receptacle having an outlet (8) for dispensing the fluid; a plunger (12); a propulsion mechanism (14) which urges the plunger (12) in a direction to pressurise the fluid (6) and dispense it through the outlet (8); and a retaining member (16) which acts on the plunger (12) to control or prevent travel of the plunger (12); characterised in that the retaining member (16) is operably connected to a stepper motor (24) via a worm (22) and worm-wheel (18) drive.

Abstract: The invention relates to a device for ejecting a liquid or paste product, including a body (2) having a recess (11) for receiving a product to be ejected, characterized in that it includes a threaded rod (3), which is translatably movable so as to act on the product to be ejected, a bolt (5), which is mounted so as to engage with the threaded rod (3) in order to cause same to translatably move, and a lever (1) acting on the bolt (5) by means of a control means for causing the rotation thereof.

Abstract: Ambulatory infusion pumps, pump assemblies, cartridges, baseplates, cannulas, insertion tools, and related components as well as combinations thereof and related methods.

Abstract: The present invention relates to a fluid delivery system that comprises a fluid container having a chamber structured to hold a fluid therein and a delivery device operable to control delivery of a fluid from the chamber of the fluid container. The fluid container includes a geometric mating member extending from an outer surface thereof. The delivery device includes a geometric mating receptacle structured to mate with at least a portion of the geometric mating member of the fluid container to verify compatibility of the fluid container with the delivery device. Alternatively or additionally, the fluid container may include a first data fixture component and the delivery device may include a second data fixture component that cooperates with the first data fixture component of the fluid container to verify compatibility of the fluid container with the delivery device.

Abstract: A drug solution inspection device includes a jig that mounts thereon a syringe containing a drug solution, an imaging unit that captures an image of the syringe mounted on the jig, an exposure unit that performs exposure on the syringe mounted on the jig, and a first control unit that controls the imaging unit and the exposure unit to acquire inspection information. In order to inspect an amount of the drug solution in the syringe, the first control unit transmits the captured image of the syringe while changing an exposure state of the exposure unit.

Abstract: A bone cement delivery system for vertebroplasty with a cannula having a rigid metal tubular inner wall surrounding a central conduit with a distal outlet port, a rigid metal tubular outer wall extending around the inner wall to define a peripheral conduit with a distal inlet port in the form of fenestrations defined in the tubular outer wall, unobstructed and directly exposed to an environment of the delivery system, a proximal inlet port in communication with the central conduit and a proximal outlet port in communication with the peripheral conduit. A vacuum pump communicating with the proximal outlet port of the peripheral conduit applies a pressure in the range of 10 to 100 KPa to create a pressure gradient between the central conduit and the peripheral conduit to produce a difference in flow rate between the conduits guiding the displacement of bone fluid and the flow of cement.

Abstract: A contrast media injection system includes detects the absolute position of the syringe ram using a non-contact sensor. A series of magnets and Hall-Effect sensors may be used or an opto-reflective system. Illuminated knobs that are connected to the drive mechanism for the syringe ram rotate with the drive and provide visual feedback on operation through the illumination. Analog Hall-Effect sensors are used to determine the presence or absence of magnets that identify the type of faceplate being used. The faceplates include control electronics, connected to the powerhead through connectors, which may be interchangeably used by the two faceplates. The faceplate electronics include detectors for automatically detecting the capacity of pre-filled syringes.

Abstract: Various handheld medical dispensing configurations and methods including the following: Handheld medical dispensing system comprises a syringe, which has a plunger, releasably mounted to syringe actuation apparatus, the apparatus having an actuator configured such that it can move the plunger more than once to dispense a plurality of amounts of substance from the syringe. A method of dispensing fluid from a syringe comprises holding a medical substance delivery system including a syringe, which has a needle, and which is secured to syringe actuation apparatus configured to dispense predetermined amounts of the substance from the syringe, penetrating the needle at one patient site and using the apparatus to deliver a predetermined amount of the substance, and penetrating the needle at another patient site and using the apparatus to deliver a predetermined amount of the substance.

Abstract: A syringe plunger driver system capable of capturing syringes of widely varying sizes comprises a pair of asymmetric plunger retainer arms pivotally mounted to a plunger driver. The system includes a low profile driver having a length that exceeds its width so that it may be mounted adjacent control modules and other operational modules. The arms are biased toward each other and one arm is longer than the other with a notch on an inside edge to receive the tip of the shorter arm when capturing small syringe flanges. A rotation knob mounted to the front surface of the low profile driver forces the arms apart when rotated to a first rotation position. A force sensor is mounted in the driver to detect occlusions in the fluid line. A processor monitors the force sensed by the force sensor and provides an alarm if the force exceeds a threshold.

Abstract: An improved spindle and bearing combination for a drug delivery device is provided that has a first connection between the spindle and bearing comprising a web and a second connection that replaces the first connection when the web is severed that allows the spindle to rotate relative to the bearing.

Abstract: Devices and systems for injecting fluids and/or other materials into a targeted anatomical location, in particular, a joint or intra-articular space, include a handpiece assembly having a needle extending from its distal end, a fluid delivery module comprising a cassette and a fluid transfer device. A conduit is generally configured to place the fluid delivery module in fluid communication with the handpiece assembly. Medicaments, formulations and/or other fluids or materials contained within vials that are secured to a cassette or other portion of the fluid delivery module can be selectively delivered into an anatomy through a needle located at the distal end of the handpiece assembly. In some embodiments, ultrasound or other imaging technologies can be used to locate a joint or other targeted anatomical location.

Abstract: Devices and systems for injecting fluids, such as anesthetics, to or near nerve tissue or other targeted anatomical location are disclosed herein. A conduit is generally configured to place the fluid delivery module in fluid communication with a needle that is configured to be inserted into the patient's anatomy. One or more medicaments (e.g., anesthetics) and/or other materials contained within containers (e.g., vials) that are secured to the injection system can be selectively delivered into an anatomy through the needle. Nerve stimulation and/or imaging technologies (e.g., ultrasound) can be used to locate a targeted anatomical location. Aspiration can be used to confirm needle location. An overlay on the imaging display can include, in addition to real-time imaging data, data and other information relating to back pressure at or near the needle tip, volumes or other amounts of fluids delivered by and remaining within the system, stimulation level and/or the like.

Abstract: The injection device comprises: a static structure (2) comprising a first gear member (14), a dynamic structure (3) comprising a medicine container (11), means (6, 7, 8, 12) for pushing liquid medicine out of said medicine container (11) for its injection to a patient, and a second gear member (13) engaged with the first gear member (14), a drive member (4) for driving one (14) of the first and second gear members (13, 14) so as to cause the dynamic structure (3) to move relative to the static structure (2) along a predetermined direction (D) due to the engagement between the first and second gear members (13, 14), and clutch means (23, 25, 28) for maintaining engagement between the first and second gear members (13, 14) in normal condition of the injection device, and for allowing disengagement of the first and second gear members (13, 14) upon a shock received by the injection device along the predetermined direction (D).

Abstract: A dermal filler injector is provided which includes a handpiece and a coupling mechanism for operationally coupling the handpiece with a dermal filler cartridge. The handpiece includes a motor for controllably driving a plunger in the cartridge to provide effective and controlled injection of a dermal filler into skin.