Abstract: The device for applying a flowable medium, in particular a tissue adhesive is provided with at least one reservoir (16) for the medium, wherein said reservoir (16) comprises an outlet (22) from which the medium exits when pressure is applied to the medium and/or said reservoir (16). A pressure-generating element (20) acts upon the medium and/or said reservoir (16) and is biased by a biasing means (34). Said biasing means (34) can be locked with the aid of a controllable locking means (58), wherein said locking means (58) comprises a movable fixing element (54) which, in at least one fixing position, locks the biasing element (34) against movements caused by the biasing process, and is movable out of the at least one fixing position to release said biasing element (34).

Abstract: The invention relates to an injection device (10) having a housing (15) and an injector fluid container (12) whicj can move, in relation to this housing, between a distal and proximal end position, and also having a pushrod (14) to act on a plunger 923) in this container (12) for the purpose of expelling fluid from the container. A device connection (27) is provided between the pushrod (14) and the container, this drive connection is effective in both the proximal end position of the container (12), it is only effective when the pushrod (14) is moved in the distal direction.

Abstract: An injector pack has a box which houses in separate positions a firing mechanism and a syringe housing. The firing mechanism has safe and cocked conditions and as it is located in the box it is constrained to adopt the safe condition by a sleeve grip being held against rotation while a protruding barrel co-operates with cams to rotate it. The firing mechanism when removed can be screwed by its barrel to the rear end of the syringe housing while that is held by the box, and then the whole injector can be withdrawn for use. The syringe is made operable by rotating the barrel to the cocked condition. Pressing the grip forwards then releases a plunger to act on the syringe. The previous retraction of the plunger can be done using a pillar formation upstanding within the box and over which the barrel can be sleeved.

Abstract: The invention relates to: A medication delivery device (1) for delivering a specific dose comprising a medication cartridge (11) having an outlet (111) and a piston (112), and means (12) for holding said cartridge, and a piston rod (13) being operable to engage and displace said piston, and electrically driven actuating means (15), and driving means (161, 162) for transferring movement from said actuating means to said piston rod, and memory means (17) for storing data, and processing means (18) for evaluating said data and for controlling said actuating means. The object of the present invention is to provide a medication delivery system that combines a relatively high dose accuracy with the use of relatively low quality mechanical components and which enables compensation for built-in non-linearities.

Abstract: The invention relates to an apparatus for the atomized discharge of a liquid medium. The apparatus can be operated with one hand for the discharge of a liquid medium in partial strokes that are successively performed and not unintentionally interrupted. The apparatus has an operating trigger to engage the ram, which operates the piston that is displaceable in the spray cylinder, the operating path of the operating trigger being so limited between an operating starting position and end position that the resulting discharge stroke of the piston may vary for successive partial discharges of the stored medium.

Abstract: An electrically-driven dental injector used in orally injecting such an injection liquid as an anesthetic in dental treatment. Electrically-driven dental injectors includes one having a mechanism for disengaging a pinion (82) from a rack (48) in order to retract a plunger rod (44) upon completion of injection; however, it has heretofore been necessary to manually operate the operating part from outside each time. The inventive electrically-driven dental injector is so arranged that the plunger rod can be manually pushed back directly oupon completion of injection without reqiring manual operation, and, to this end, the injector comprises a latch mechanism (84) for engaging/disengaging the ring gear (70) of a planetary reduction gear (50) with/from a casing (52), and an operating rod (94) extending through a support member (20) and functionally cooperating with the latch mechanism (84).

Abstract: Materials delivery devices, e.g. for drugs etc. (FIGS. 1-7) or body fluids (FIGS. 8-12), have administration means of piston-and-cylinder (100; 300) or peristaltic rollers and tube (546, 565; 646, 665; 746, 765; 846, 865; 946, 965) type, and intermittently incremental drive transmission means of cooperating toothed rack (143) or wheel (345, 445; 545; 645; 745; 845; 945) and deflectable biassed pawl (153, 156; 343, 356; 453, 456; 553, 556; 653, 656; 753, 756; 853, 856; 953, 956) type driven by pulsed reciprocating solenoid action (110; 310; 410; 510). Portable patient-wearable drug delivery devices (10; 30; 40; 50) can use pre-loaded cartridges (120; 320; 420; 520) and have solenoid drive (130) for needle-entry and battery-powered electronic control, etc. Intravenous infusion pumps (60; 70; 80; 90) can operate relative to body fluid reservoirs or for body fluid transfers.

Abstract: An injection device made up from a housing, a dose setting and injection mechanism, a dose setting member and an injection button is described. The dose setting and injection mechanism is made as a preassembled unit insertable into the housing. Both the dose setting member and the injection button is thereafter connected to the preassembled dose setting and injection mechanism inside the boundaries of the housing, while being accessible for a user from outside the housing. The same preassembled dose setting and injection mechanism can fit into a large variety of different houses making production of different variants of an injection device somewhat easier.

Abstract: An injection device for injecting set doses from an ampoule (2) mounted in the device, which doses are set by operation of a dose setting button (7) by which operation elastic torsion rods (14) positioned parallel with the longitudinal axis of the device are twisted. By the dose setting a torque is transmitted from the dose setting button (7) to the rods (14) through gear transmissions comprising a toothing (11) carried by a tubular (8) part coupled to the dose setting button (7) to rotate with this button. The toothing (11) engages pinions (13) fixed to the proximal ends of the torsion rods (14), which are made from a super elastic material, which can stand a deformation larger than 2% without being permanently deformed.

Abstract: The invention concerns a device for administering an injectable product in doses, comprising:

Abstract: A flexible piston rod for use in cylinder ampoules comprises a tape shaped body (1) which is along its length provided with supporters (2; 6; 16) projecting from at least one side of the tape. The tape (1) has a width and the supporters a length so that sides of the tape and the free ends of the supporters abuts the inner wall of the ampoule (3) in at least three positions along the inner perimeter of the ampoule (3) and not all the abutment points lies on the same half of the circular cross section but are typically displaced about 120° from each other. The piston rod is moved by a gear engaging a rack (12) on the tape either on the side not carrying supporters or at the edge of the tape on the side carrying supporters.

Abstract: This invention is a single-use syringe (10) having a rd-like plunger (14) and made with a plurality of frusto-conical or bead-like ratchet teeth (28). A radially resilient, spring locking clip (40) dangles on the ratchet portion of the plunger. The location of the clip determines the maximum dosage which can be administered by the syringe. Aspirating gaps (114) can be provided on the plunger rod to allow selective aspiration prior to loading and dispensing medication. In use, a first withdrawal of the plunger with respect to the barrel (12) allows, for aspiration, then medication can be drawn into the cavity of the barrel since the cam tooth (83) of the locking spring clip glides, by radial flexing, over the surface of the ratchet teeth and, yet, the locking spring is maintained in relative position along the barrel by outwardly directed contact points embedding into the interior sidewall of the barrel.

Abstract: A digital fluid delivery and aspiration apparatus with a mechanical de-amplifier for the delivery or removal of discrete volumes of fluidic material from a surgical site. The apparatus has a syringe with a plunger designed to be powered by a pneumatic air supply system. A ratcheting mechanism attached to a pneumatic piston by a mechanical linkage causes the plunger of the syringe to inject discrete doses of the fluidic material into the surgical site or remove discrete amounts of fluidic material from the surgical site. The mechanical linkage increases the force provided to the plunger by the movement of the piston and also de-amplifies the movement of the piston into a lesser movement of the plunger.

Abstract: The present invention provides a device for metered administration of an injectable product including a base section, a container, a drive unit including a driven member projecting into the container, and a metering device for setting the path length of displacement of the driven member in relation to the base section upon actuation of the drive unit, wherein the metering device includes a first and second metering structure.

Abstract: The present invention relates to syringes for apportioning set doses from an ampoule has a dose setting and injection mechanism comprising a dose setting member which may be moved in one direction to set a dose and in the opposite direction to inject the set dose. A piston advancing mechanism comprises a piston rod and a piston rod drive, and the dose setting and injection mechanism is coupled to the piston advancing mechanism through a unidirectional coupling transmitting only movement of the dose setting member in the dose injecting direction to the piston rod drive. Operation of an air shot button enables influence on the piston advancing mechanism to advance the piston to expel an adjustable fixed volume. The air shot button is either coupled to the piston rod drive through a unidirectional coupling through which the piston rod is advanced when the air shot button is pressed, or it moves the end stop for an injection button so that this button may be pressed beyond its normal depressed end position.

Abstract: A digital fluid delivery and aspiration apparatus with a mechanical de-amplifier for the delivery or removal of discrete volumes of fluidic material from a surgical site. The apparatus has a syringe with a plunger designed to be powered by a pneumatic air supply system. A ratcheting mechanism attached to a pneumatic piston by a mechanical linkage causes the plunger of the syringe to inject discrete doses of the fluidic material into the surgical site or remove discrete amounts of fluidic material from the surgical site. The mechanical linkage increases the force provided to the plunger by the movement of the piston and also de-amplifies the movement of the piston into a lesser movement of the plunger.

Abstract: A needleless injector for injecting medication through the skin of a patient includes a vial which holds a volume of liquid medication. The vial includes a vial piston which moves to force the liquid medication out of the vial. A power mechanism applies force to the vial piston. The power mechanism includes a power piston which has a plurality of ratchets. A spring is positioned to apply force to the power piston. A trigger engages the ratchets on the power piston to hold the power piston in place against the force applied by the spring. The trigger selectively releases the power piston so that the power piston moves in response to the force applied by the spring. The power piston applies the force to the vial piston to cause the vial piston to force the liquid medication out of the vial. A cocking mechanism applies force to the power piston to move the power piston against the force of the spring to engage the ratchets.

Abstract: A medication delivery pen having a repeat-dose feature that is performed by using a pull-push operation. In particular, the medication delivery pen includes means for determining whether the medication delivery pen is armed and a variety of novel drive mechanisms. In addition, the medication delivery pen also includes a priming control mechanism that allows the user to easily prime medication delivery pen prior to arming the pen.

Abstract: In a syringe dosing mechanism a threaded spindle (1) and a nut (3) cooperates so that relative rotation thereof moves the nut (3) along the spindle (1). The nut (3) has two intersecting bores (12, 15). The first bore (15) has an inner thread (7) matching the outer thread (2) of the spindle (1) and the second bore (12) is smooth and fits slidingly over the spindle (1). The nut (3) is tiltable between a first and a second position. In the first position the threaded bore (15) is coaxial with the spindle (1) and in the second position the smooth bore (12) is coaxial with the spindle (1). The nut (3) is at a first side hinged to a piston rod (6)so that exertion of a force by the nut (3) on the piston rod (6) in a direction (10) by which an injection is performed will tilt said nut (3) into its first position.

Abstract: A paste injector gun, especially adapted for injecting bone cement, has first and second mechanical advantages. In a first embodiment, the first and second mechanical advantages are produced by two fulcrums engageable during different portions of the trigger stroke. In a second embodiment, the first and second mechanical advantages are produced by a fixed fulcrum and a rotatable fulcrum. The first mechanical advantage is greater than the second such that the first facilitates pressurizing the bone cement and the second facilitates high volume dispensing of the bone cement. The injector gun also includes a pair of U-shaped slots. One of the slots is sized to accept a large cement cartridge and the other slot is sized to accept a small cement cartridge. An alternative embodiment provides a hinged cartridge retaining gate for closing the U-shaped slots for positive retention of the cartridge.

Abstract: A syringe having a body connected with a barrel and a fastening unit for fastening of the double-edged needle at the other end. A plunger having ratchet teeth is located in the body. A stopper pawl which prevents return movement of the plunger is installed with a possibility of interaction with the plunger. A drive unit including a rotary handle is fixed on the body and a drive pawl is fixed on the handle. A compensator of a cartridge length is located in the body. A guiding element is positioned between the barrel and the fastening unit. The fastening unit is made in the form of a hollow sphere with a slot and a holder of double-edged needle which is fixed in the slot with the possibility of moving in the slot on the generatrix of a surface of the sphere to an angle up to 180.degree.. An aspiration element is fixed on one end of the plunger.

Abstract: A connector assembly includes first and second fittings including first and second membrane assemblies, respectively, and a stem member. A fluid delivery system includes a connector assembly, a container for holding fluids and tubing which couples the container to one of the first and second fittings. A method for making a contaminant-free connection comprises mating first and second fittings, and establishing a fluid flow path through the first and second fittings. The systems, assemblies and methods according to the invention may be used, for example, to handle a biological fluid while maintaining the fluid free of viable contaminating microorganisms or preserving its sterility.

Abstract: A self refilling syringe for administering medicinal fluid to a patient including a removable syringe body having a plunger chamber formed at its front end with a connector port. A plunger is received in the chamber from an open end opposite the connector port and includes a plunger head on one end and a piston on the other end. The forward end of the syringe body includes a hub device mounted on the front end of the syringe body and is formed with a filler port and an applicator port in communication with the connector port. A filler check valve and an applicator check valve are disposed in the respective filler and applicator ports. Upon application of a positive pressure to the filler and applicator check valves from the chamber, the applicator check valve closes and the filler check valve opens to discharge fluid through the applicator port.

Abstract: A metering instrument for dispensing several doses of a liquid includes a tubular body designed to be held by the user, a reservoir containing the liquid, a movable tail mounted inside and on the axis of body, and a pusher grippable by the user and mounted translationally in the body. The tail has a rack constituted by successive annular notches, and the body has several axial slots distributed over its periphery. The pusher includes an outwardly projecting pin that is designed to engage one of the axial slots of the body.

Abstract: Disclosed is a closed system for the handling of injectable biological products and vaccines used in the treatment and prevention of livestock diseases. This system embodies a prefilled disposable cartridge (44) with disposable needle (48) attached and a metered pistolgrip syringe. The cartridge (44) is breech loaded into the syringe and the product is dispensed from the cartridge by a unique drag link (22) mechanism as a means for advancing the plunger rod (36) and forcing the vaccine from the cartridge (44) into the flesh of animal being treated. Each prefilled cartridge is disposed of after it is emptied and no cleaning is required. A color coding system between the prefilled cartridges 44 and the and the syringe bodies insure that proper dosages are given and that different products are not mixed up or confused with each other by the technicians dispensing the biological products.

Abstract: A medical injection device, such as a pen-type injector has a microprocessor coupled to the injector that records the date, the time, and the amount of each injection. The microprocessor may also be coupled to a display to indicate the amount of medication to be injected. The medical injection device can also be coupled with a blood characteristic monitor to analyze characteristics of the blood. This provides a single, all-in-one device that performs a variety of functions, and requires only a minimum of space. The medical injection device may also use a disposable needle that substantially eliminates or reduces bleeding from an opening in the skin at the injection site.

Abstract: A paste injector gun, especially adapted for injecting bone cement, has first and second mechanical advantages corresponding to different portions of the trigger stroke. The first mechanical advantage is greater than the second such that the first facilitates pressurizing the bone cement and the second facilitates high volume dispensing of the bone cement. The injector gun also includes a pair of U-shaped slots. One of the slots is sized to accept a large cement cartridge and the other slot is sized to accept a small cement cartridge.

Abstract: The present invention relates to a syringe for delivering only a single dose of a medicament at each actuation of the syringe. The device includes a cylinder which is adapted to contain the medicament, the cylinder having a piston which is journalled in the bore of the cylinder for axial movement in the bore towards an outlet. The piston can be moved axially within the bore of the cylinder by means of a plunger member which carries one or more drive teeth which are adapted to engage teeth carried by an axially moveable drive member. The axial spacing between the axially adjacent teeth on either the plunger member or the drive member corresponds to the forward axial movement of the plunger member which is required to discharge a single dose of medicament. The drive member can also be retracted axially only a predetermined distance which corresponds to one of the tooth spacings with respect to the plunger.

Abstract: The present invention provides an improved device for preventing the backing up of a nut on a threaded piston rod in the barrel of a hypodermic syringe at the end of dose administration from such syringe. The preferred device is a pawl mounted on the end of a flexible arm of a nut which cooperates with slots on the inside of a syringe barrel. The nut also has an incline surface at the end which mates with an incline surface in the barrel end. The mating of these surfaces at the end of dose administration forces the pawl into a slot, thereby preventing rotation of the nut in the wrong direction and the concurrent movement of the nut up the piston rod associated therewith.

Abstract: A syringe for administering medicines, pharmaceuticals, and other liquid or semi-liquid materials includes a movable scale which is automatically reset to a zero position after a preselected dosage of material has been discharged from the syringe. The scale is adjustable for selecting subsequent dosages to be discharged, which may be the same or different in quantity from the previously discharged dosage. The automatic zero reset feature of the scale enables a user to administer multiple dosages of material from the same syringe, and vary the quantity of each dosage if desired, without the need to make calculations or adjust the scale to compensate for either the quantity of material previously discharged from the syringe or the quantity of material currently remaining in the syringe.

Abstract: A dispensing device for dispensing at least two fluids comprises a housing (12,22) of a pistol-like configuration having an integral handle (50), in which a spring-biased trigger (60) is received. Within the housing (12,22) of the dispensing device (10), two syringes (80,81) are received and fixated, which syringes contain respective fluids to be accurately dispensed. Provided a cover (22) of the housing is closed, the motion of the trigger (60) relative to the handle (50) is transmitted to a toothed rack which cooperates with a propeller body (70) in a ratchet-like manner. The ratchet-like cooperation allows a uni-directional motion of the propeller body (70) and prevents a motion of the propeller body (70) in the opposite direction.

Abstract: This invention relates to a syringe assembly which includes a housing having a barrel having a forward fluid discharge end; a plunger disposed within said barrel and having a threaded rod extending therefrom; a threaded nut element for engaging said threaded rod for threaded advancement of said plunger relative to said barrel; and a control lever for positively engaging and positively disengaging said threaded nut element with said threaded rod, said control lever having a first arm member connected to said threaded nut element and being pivotably mounted for pivot between an engaged position wherein said first arm member positively engages said threaded nut element with said threaded rod, and a disengaged position wherein said first arm member positively disengages said threaded nut element from said threaded rod.

Abstract: A feed mechanism for an injection device having an ampoule casing (13) includes an outer casing (2), an inner casing (3) protruding rearwardly from the outer casing and a toothed rack (4) longitudinally displaceable with the inner casing against the force of a spring (8). The rack has teeth (5) of which the length L corresponds to one full injection dose. The inner casing is longitudinally movable by a length L between two stops (6, 7) in the inner and outer casings. The inner casing has a latch (9, 10) which detachably locks the inner casing at its extreme forward position into an aperture (11) of the ampoule casing. A pawl prevents return movement of the rack.

Abstract: A medication dispensing device comprising a cartridge for containing an injectable product therein and an injector attached to the cartridge. The injector includes a drive mechanism comprising a dosage sleeve having a dosage knob at the proximal end thereof and a threaded rod coupled to the sleeve and axially advanceable into the cartridge upon clockwise rotation of the knob for dialing up a desired dosage to be injected. A ratchet mechanism is disposed in the injector housing and includes a rotatable piece secured to the dosage sleeve for rotation therewith and a locking seat in engagement with the rotatable piece. The ratchet mechanism permits rotational movement of the sleeve in the clockwise direction only. A disengaging mechanism is secured to the housing of the LCD assembly and includes a pin that extends into and engages the rotatable piece of the ratchet mechanism such that axial movement of the pin causes corresponding axial movement of the stationary piece.

Abstract: A dispensing device for dispensing at least two fluids comprises a housing (12,22) of a pistol-like configuration having an integral handle (50), in which a spring-biased trigger (60) is received. Within the housing (12,22) of the dispensing device (10), two syringes (80,81) are received and fixated, which syringes contain respective fluids to be accurately dispensed. Provided a cover (22) of the housing is closed, the motion of the trigger (60) relative to the handle (50) is transmitted to a toothed rack which cooperates with a propeller body (70) in a ratchet-like manner. The ratchet-like cooperation allows a uni-directional motion of the propeller body (70) and prevents a motion of the propeller body (70) in the opposite direction.

Abstract: A device (10) for injection of fluidic materials into body tissue includes a syringe (22) and an injection housing (24). The syringe (24) includes a first end (26), a second end (28) , a hollow barrel (30) , a plunger (32) , and a rod (34) which extends through the second end (28) of the syringe (24). The housing (24) further includes a first end (42), a second end (44), and a bore (46). The first end (42) of the housing is disposed in juxtaposed relationship with the second end (28) of the syringe ( 22 ) . The rod ( 34 ) extends beyond the second end (44) of the housing (24). A piston (72) travels within the bore ( 46 ) in a reciprocal fashion, and cooperates with the rod ( 34 ) in a ratchet-like fashion. The piston (72) engages the rod (34) as the piston (72) travels toward the first end (42) of the housing (24), and disengages from the rod (34) as the piston (72) travels toward the second end (44) of the housing (24).

Abstract: A surgical instrument for injecting/removing non-solid substances is diclosed. The instrument comprises a body formed from two legs (1, 2) pivotally articulated to each other at one of their ends, one of said legs (1) being provided with means (15,17) for receiving and retaining a syringe or squirt (16) while the other of said legs (2) is provided with means (20,22) for selectively retaining a plunger (19) which cooperates with said syringe or squirt, said legs being selectively pivotable between a first position wherein said plunger (19) is received within said syringe (16) and a plurality of positions wherein plunger (18) moves within syringe (16) in order to inject/remove a non-solid substance.

Abstract: A syringe for administering medicines, pharmaceuticals, and other liquid or semi-liquid materials includes a movable scale which is automatically reset to a zero position after a preselected dosage of material has been discharged from the syringe. The scale is adjustable for selecting subsequent dosages to be discharged, which may be the same or different in quantity from the previously discharged dosage. The automatic zero reset feature of the scale enables a user to administer multiple dosages of material from the same syringe, and vary the quantity of each dosage if desired, without the need to make calculations or adjust the scale to compensate for either the quantity of material previously discharged from the syringe or the quantity of material currently remaining in the syringe.

Abstract: A pharmaceutical component-mixing syringe assembly (2) is particularly suited for packaging, reconstituting and dispensing a series of equal doses of a multiple component pharmaceutical, such as human growth hormone reconstituted from a diluent component (128) and a lyophilized component (34). The pharmaceutical components are contained within first and second cartridges (10, 36) of the type having a movable piston (12, 40). The second cartridge is forced into the interior of the first cartridge causing a spike assembly (132) between the two to fluidly couple the two cartridges and drive the piston of the first cartridge into the first cartridge causing the contents of the first cartridge to be driven into the second cartridge, thereby mixing. A reciprocating ratchet plunger (104) is used to drive the second piston. The distance the ratchet plunger moves, and thus the dose, is determined by the position of a user-inaccessible dosing key stop (116) along the length of the ratchet plunger.

Abstract: An endoscopic tool for dispensing units of hemostatic agent broadly comprises a hollow tube which holds a plurality of individual units of the hemostatic agent, a valve at the distal end of the hollow tube which permits the hemostatic agent to pass therethrough but prevents foreign matter from contacting the hemostatic agent while in the tube, a plunger which extends into the hollow tube and contacts a proximal unit of the hemostatic agent, and a mechanism for moving the plunger distally in incremental movements to cause, upon each incremental movement, an individual unit of the hemostatic agent to be pushed through the valve. Typically, the mechanism for moving the plunger and the proximal end of the hollow tube are held in a handle. One mechanism for moving the plunger utilizes a portion of the plunger as a ratchet by forming a plurality of conical elements thereon, and utilizes a switch in the handle which has a V-spring coupled thereto as a pawl for advancing the conical elements.

Abstract: A control syringe is provided for fine needle aspiration of biopsy tissue. An aperture through the barrel of the syringe is temporarily covered with a flexible impervious pressure sensitive adhesive tape. A low pressure created in the barrel by withdrawing the plunger is broken by peeling the tape from the barrel. Thereafter, the tape may be replaced over the aperture so that collected tissue may be discharged by moving the plunger forward. A ratchet and pawl arrangement on the syringe holds the plunger in its rearward position until released. One ratchet and pawl comprises a plurality of ratchet teeth along at least one rib of an X-shaped cross section of the plunger and a pawl on the rearward end of the barrel for engaging the ratchet teeth. Such a ratchet is released by rotating the plunger.

Abstract: Two embodiments of a multi-dose syringe both include structure for indicating the selected amount of liquid to be injected. A first element and a second element coupled respectively to the syringe housing and the plunger rod are adapted for calibrated movement with respect to each other, one of the first and second elements includes an outer portion having dose-indicating scale thereon, and another of the first and second elements surrounding said outer portion includes a window through which only a segment of the dose-indicating scale on said portion is visible, the visible portion indicating the amount of liquid selected for injection.

Abstract: The injection device described comprises a loading element (74) which can be moved longitudinally for loading purposes and is rotatable for the purpose of setting the injection dose. Associated with this loading element (74) is a second setting element (86). The latter allows a judicious internal combination of the information supplied by the position of the loading element (74) and of the second setting element (86). The patient can effect several individually-dosed injections from a single container.

Abstract: A dosage unit for dosing a number of measured quantities of a liquid, such as insulin, from a cartridge (2), said dosage unit comprising a cylindrical casing (1) for the cartridge (2), the distal end of the casing (1) being provided with means for fastening an injection needle (5) with two points protruding at opposite sides, one point (7) thereof being provided to be plunged into the cartridge (2). The other end of the casing comprises a piston rod (13) for exerting a force on a piston (8) inside the cartridge (2) and an adjustment means (20) provided with an inner thread (21), said adjustment means being in rotatable engagement with an outer thread (19) on the outside of the casing (1). The adjustment means (20) is adapted to limit the length of the stroke of the piston rod (13) after adjustment in accordance with a measuring scale (37, 38) stating the desired dosage quantity.

Abstract: An injection gun especially useful for injecting low volume, high pressure shots of bone cement. The gun includes a cylindrical housing with a plunger including a plunger rod extending axially through the housing. The plunger rod includes a segment which is provided with an axial series of notches. A ratchet block is slidable axially within the cylindrical housing and is concentric with the plunger rod. The ratchet cylinder mounts at least a ratchet pawl urged against the plunger rod and adapted to engage and lock into the series of notches for forward movement. A pistol grip extends from the cylindrical housing, and a lever is pivoted thereto with an extension of the lever engaging the ratchet cylinder for advancing the plunger. A second ratchet pawl is mounted on a fixed member of the cylindrical housing for retaining the plunger against rearward movement when the pawl in the ratchet cylinder is disengaged from the rod.

Abstract: A cartridge assembly for a syringe-type medication dispensing unit includes a cartridge having a cartridge body with first and second ends. A pierceable membrane is mounted at the first end and a piston is mounted at the second end, with a volume of medication contained in the cartridge body between the membrane and the piston. A cartridge holder receives the cartridge and defines first and second ends. The first holder end defines a central opening and an external thread for mounting a double-ended needle. The second holder end defines an external thread for securing the holder to a medication dispensing unit and an actuating shoulder. The holder frictionally engages the cartridge to form an assembly which can be handled as a single modular unit with the cartridge held securely in the holder by frictional engagement.

Abstract: A manually driven syringe for injecting fluids under high pressure is described that includes a barrel (12), a plunger (13) that is received within the barrel and extends rearwardly through an aperture (28) in the body (27) of a handle (14) which carries a pair of opposed finger grips (19, 22). The finger grips are located rearwardly of the barrel and laterally of the shaft (19) of the plunger, elongated so as to each accommodate two fingers, and angled rearwardly. This design minimizes the distance between (a) the inner edges of the grips and (b) the grips and the head of the extended plunger, thus making the syringe easier to grip in the palm of the hand and enabling the syringe to be gripped strongly between the fingers and the palm.

Abstract: The present invention relates to a device for dispensing a fluid from a container by means of the axial movement of a piston within the container under the influence of a plunger moved by the device, which device is adapted to receive the container on its forward end and to move the plunger axially forward towards or within the container so as to dispense a selected amount of fluid from the container upon each actuation of the device, characterized in that the device comprises:i. a disengageable drive mechanism adapted to be reciprocated axially of the device and adapted to positively engage the plunger whereby the plunger can be moved axially forward by the drive mechanism and to be disengaged from the plunger to permit relative axial movement between the drive mechanism and the plunger;ii. a disengagement means for selectively engaging or disengaging the drive means from the plunger;iii.

Abstract: A syringe is provided with a helical spring, which furnishes an upper limit to a pressure employed via a plunger to move a fluid or paste through an opening in a syringe. The plunger is maintained in a low compressing state versus the fluid with the helical spring. A toothed rack is attached to the plunger. The toothed rack is engaged by a ratchet forming part of a lever. The lever is hinged on an axially movable assembly. Actuation of the lever drives the ratchet and therewith toothed rack and plunger forward against the force of the spring. As more force is applied to the plunger the resilient force of the compression spring allows the axially movable assembly to move backward and thus to limit the pressure exerted by the plunger on the fluid. A second ratchet can be provided for preventing a backward motion of the toothed rack while the lever seeks a new point of engagement for the ratchet with the toothed rack.

Abstract: A precision injection system and method for intralignmental anesthesia and the like having a syringe with a tubular handle portion to which are removably connectable individually tubular headpieces as a longitudinal extension thereof. The headpieces receive a carpule cartridge with semi-solid contents therein or with liquid injection contents monitored during injections through elongate windows on opposite sides of the headpieces. Provision is also made for injection of known composite materials the viscosity of which cannot be determined by standard viscosity measurement methods. A dosing plunger housed in the tubular handle portion in a retracted start position is activated by a servo-dosing lever and advances incrementally axially into a mounted headpiece for delivery of metered quantities of the contents of the carpule cartridge each time the servo-dosing lever is actuated.