Abstract: The invention relates to a training device for an automatic injector. The device comprises a cylindrical outer sleeve in the rear portion of which a discharge mechanism is connected and in the front portion of which a holder intended for accommodating a punch member is incorporated so as to be locked against forward movement. The discharge mechanism comprises a plunger, a coil spring which acts on the plunger, a locking device and a safety member. The holder for the punch member comprises a sleeve-like rear portion which is open at each end. The punch member is accommodated in the holder such that its rear end at least substantially engages the front end of the plunger, and such that the front prod-shaped end portion which has dimensions such that it can pass through the central aperture in the nose portion of the holder outwards, is present within the holder prior to use of the device. The device further comprises auxiliary means for making the device ready for reuse.

Abstract: An automatic injector is provided having at least two chambers containing different ingredients of a medicament separated by an impermeable membrane. A lance is movable independently of a plunger to cut or pierce the membrane before a spring-loaded drive member for the plunger is released to drive a needle out of the body of the injector and discharge the medicament through the needle. A removable safety clip is provided for preventing movement of an actuating cap into an operative position for advancing the lance, and release of the drive member is preventable by a removable safety pin until the injector is to be used.

Abstract: The invention relates to a training device for an automatic injector, comprising a cylindrical outer sleeve, in the rear portion of which a discharge mechanism is connected and in the front portion of which a holder for a punch member is accommodated so as to be locked against forward movement. The discharge mechanism comprises a plunger, a coil spring which acts on the plunger, a locking device and a safety member. The holder for the punch member comprises a sleeve-like rear portion which is open at each end. The punch member is accommodated in the holder so that the front prod-shaped end portion, which has such dimensions that it can pass throuogh the central aperture in the nose portion of the holder outward, is present inside the holder prior to use of the device.

Abstract: A medical injector apparatus includes a syringe having a barrel with a lateral projection, a needle, a plunger in the barrel having a portion extending from the barrel opposite the needle.

Abstract: An ampoule is provided with openings and a flexible membrane, forming a cavity, in which medication is stored in liquid form. The membrane is extended into the front end of an injection pistol which has a spring loaded punch which upon release, empties the ampoule through the openings. The ampoule has a flat front plate which covers the front end of the injection pistol. The openings of the ampoule are formed as nozzles in short truncated cones arranged in circular fashion on the front plate.

Abstract: An arm board for supporting the forearm, wrist and hand during intravenous therapy includes a contoured support having adjoined forearm, wrist and hand support surfaces for conformally supporting the ventral surfaces of the forearm, wrist and palm. A handgrip is provided adjoining the palm support surface, and thumb recesses are provided on each side of the hand support to enable the patient to grip the support. A tubing support member is pivotally mounted at the handgrip to provide support for intravenous tubing. The tubing support member is mounted to be pivotable about its handgrip mounting as well as to be vertically adjustable with respect to the handgrip. The pivot mounting is contained within the handgrip and includes a locking or clamping mechanism which is manually operable via a thumbwheel accessible through the handgrip for fixing the tubing support in place.

Abstract: A portable drug delivery device for delivering a drug in liquid or fluid form at a constant and self-regulated rate to a patient comprises a syringe having spring loaded piston reciprocal in a cylinder having a reverse taper to pressurize the drug to be dispensed. The reverse taper on the cylinder results in decreasing friction on the piston as the piston moves in the cylinder during a dispensing cycle, and is designed to compensate for the decreasing force exerted on the piston by the expanding spring. A length of tubing connected to the syringe conveys the drug to a needle or other device for administering the drug to a patient, and a restrictor in the length of tubing impedes flow of the drug to achieve a desired flow rate. The restrictor may be sized to achieve any desired flow rate, and in a preferred form of the invention comprises a laser-burned hole in a fitting attached to the outlet end of the length of tubing.

Abstract: An automatic drip bottle set for medical drip infusion which includes an expansion drip bottle received in a cylinder covered by a spring pressure assembly having a hanger mounted thereon at the top for suspending the set, and a spring received therein to provide a pressure force against the expansion drip bottle to permit the infusion solution contained therein to be smoothly infused into the patient's body.

Abstract: Automatic injection device, as well as ampoule or cartridge for the same. In order to obtain a high speed discharge of an ampoule-hypodermic needle, as well as to ensure an operationally reliable, low weight, robust small apparatus or ampoule at long storability, sterility and re-usability of components for a plurality of injection substances, the needle body (30) of the cannulahypodermic needle (3) is constructed over part of its extension as a needle bearing (31) guided in sliding fit on the inner wall (21) of the cartridge (2). Particularly with a view to administering separate injection substances, it is provided for a cartridge or ampoule with needle and lifting element, that within the ampoule there is arranged a receptacle forming a gas volume, which receptacle can be destroyed easily by initiating the lifting movement and which is resistant to the injection fluid surrounding it.

Abstract: Apparatus for infusion of a solution into a catheter or the like, the apparatus including a syringe with an administration set having a cup-shaped member configured for selective interlocking engagement with the syringe. The syringe includes a piston member and a coil spring within the bore having a first end urging against the piston. A separable handle member has a shaft axially positionable within the bore, with a reduced diameter threaded end configured for threadably engaging an aperture in the piston. A spring retaining cup within the bore acts against the other end of the spring, with the cup having a central aperture of a dimension sufficient for passage therethrough of the reduced diameter end of the shaft of the handle. Coupling of the handle to the piston compresses the spring via the cup.

Abstract: A safety injector, primarily for self-administered medicaments, is adapted to hold a charged hypodermic syringe and its needle with the needle in a protected retracted position. When a trigger member of the injector is pressed against the skin of the patient, the needle is exposed for producing shallow penetration of the skin, then a plunger actuator is released for producing a forward movement of the syringe a limited distance to cause full penetration by the needle and a coordinated forward movement of the syringe plunger to force medicament from the syringe through the needle in a "tracked injection." A safety mechanism prevents release of the plunger actuator unless the syringe is fully seated within the injector.

Abstract: A fluid dispensing device useful as an inexpensive, light-weight ambulatory disposal drug infusion pump comprises a flexible reservoir for liquid to be administered parenterally to a patient, a mechanism for placing the liquid in the reservoir under a constant pressure for dispensing the liquid from the device, a distal septum for introducing liquid in the reservoir, and a flow control mechanism for adjustably controlling the flow rate of the liquid dispensed from the device.

Abstract: This invention discloses disposable infusion delivery systems, in each of which fluid is drawn into a receiving and retaining housing and a piston is slideable in said housing. As the piston is moved away from a discharge end of the housing, at least one elastomeric member is stretched, with the stored fluid ahead of said piston discharged from said housing by the force developed by said stretched elastomeric member. This stored fluid provides a continuous flow of fluid to a patient. There are three arrangements shown. The first enables additive drugs to be infused into a fluid stream without purging. The second shows a syringe adapted to provide the disposable infusion device, and the third provides a fluid stream to and through a pressure transducer, enabling monitoring of blood pulses with minimum distortion.

Abstract: A syringe infusion or other patient health care fluid delivery arrangement or system having a substantially constant force syringe holder/driver for a fluid-dispensing, preferably disposable, syringe to which an on-off valve and effectively bendably flexible tube connecting set are connected. The outside diameter of the tubing of an available flow-rate assortment of suitably identifiably marked tube connecting sets is formed of a desired single size by extrusion addition of a plastic outer overcoat layer over the inner fluid-carrying tubing, enabling interchangeable accommodation and securing thereon of standard single-size conventional or other desired connectors, whereby a single health care professional may fill a syringe with a prescribed dosage and concentration of health care fluid, and may also preselect and fix the delivery rate for the fluid, by selecting and assembling a given syringe holder/driver, fluid-filled syringe and tube connecting set.

Abstract: An injecting dart having an improved barb design and aerodynamics is disclosed. The dart (10) preferably includes a stainless steel needle (12), and a body having a forward section (14) and a tail section (16). A narrow shaft (11) contains and supports the needle (12). The shaft (11) includes an integral, circumferential barb (24) which maintains the dart (10) in the hide of the animal until the dart's contents are fully discharged. The tail section (16) includes several fins (17) to improve aerodynamics, and a plurality of vent holes (38) to permit free movement of the dart's piston, thereby ensuring complete and rapid delivery of the liquid to the animal.

Abstract: A device for automatically administering predetermined amounts of medication from a syringe through a conduit to a patient is described. This device includes an automatic flushing mechanism which flushes the medication from the conduit after the completion of the medication dosage using a flush syringe containing a flush solution. A force derived from a spring is used to expel the medication and the flush solution from their respective syringes. Thus, the patient is insured a full dosage of prescribed medication without the need of continuous attention by hospital staff.

Abstract: An automatic injector for injecting one or more different injection liquids, comprising a combination of a substantially cylindrical means containing a discharge mechanism and a plurality of cartridge elements. The cartridge elements comprise a piston in the substantially cylindrical means, a sealing stopper, a number of separating stoppers equal to one less than the number of the liquids, and a needle holder with injection needle. The needle holder comprises a stopper that is movable in the substantially cylindrical means and comprises a longitudinal bore. The injector comprises a by-pass means for injection liquid in front of the sealing stopper.

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: There are depicted two embodiments of an ambulatory disposable infusion delivery system in which fluid (drug) is fed to a substantially transparent receiving and retaining housing which has indicia markings conventionally applied to indicate quantity. The inflow of fluid causes an elastomeric member attached to a piston, which is slideable in a bore in this housing, to be moved, thus stretching this member. This tension provides an energy source (force) to push the fluid out of the bore when the connected tubing line is opened. The housing is provied with a discharge fluid conduit and a restrictor controlling the rate of flow. In both embodiments, the housing has a barrel with a substantially constant bore. The slideable piston in this bore has a resilient outer portion with at least two ribs providing sealing action while having a low coefficient of friction.

Abstract: A syringe infusion or other patient health care fluid delivery arrangement or system having a substantially constant force syringe holder/driver for a fluid-dispensing syringe to which an on-off valve and effectively bendably flexible tube connecting set are connected for delivery of a health care fluid to a patient delivery site at a preselected preset rate which is precision self-metered and determined by the fluid pressure and viscosity and the resistence to flow of fluid from the syringe and through the tube connecting set. The tube connecting set may be precision made to enable enhancement of predictability of fluid flow rate therethrough, and the various sets may be individually provided with indicia indicative of flow rate for given fluid and fluid pressure conditions.

Abstract: A syringe capable of remote and/or automatic control. The syringe comprises a housing defining a main chamber, a piston at one end of the chamber and biasing means for urging the piston toward the other end of the chamber, and an opening into the chamber for liquid to pass. The piston is prevented from moving by a fusible element seated on the piston and on a fuse stop for preventing the movement. A heater is provided near the fuse stop which, when energized, melts that end of the fusible element to reduce its length and thereby permit movement of the piston under the urging of the biasing means. In this way injection or aspiration is accomplished.The heater may be energized and deenergized at will and when deenergized the fusible element ceases to be melted and the movement of the piston stops.

Abstract: Disclosed is an implantable device for the injection of fluid into a patient's body. The device includes a non-invasive external part which magnetically cooperates with the implanted portion through a magnetic field. The device is entirely mechanical and is capable of delivering both a continuous dose of fluid as well as instantaneous dose of fluid. The mechanism comprises a fluid reservoir, a catheter, an elastic means, a regulating means, a magnetic drive means, a gear transmission means and a flow adjustment means.

Abstract: A rumen injector to inject a predetermined volume of medication into an animal, said injector having a body with a handle gripped by the user, a cylinder fixed to the body, a piston movably associated with the cylinder so as to define a variable volume space, a needle communicating with said space, and wherein said piston is movable to a cocked position where it is retained until automatically released upon said needle being inserted into the animal a predetermined distance.

Abstract: An infusion device for a syringe having a tubular wall with a fluid dispensing opening at one end and an internal plunger. A device includes an element for driving the syringe plunger at a selected one of a set of predetermined spring-generated forces which are substantially constant over the range of motion of the plunger.

Abstract: A mechanical drive system for driving a syringe, or other fluid infusion system, over extended period of times, which drive system also provides manual advance and quick release features. Manual advance and quick release is selectively provided by mechanically decoupling the gear train from the syringe drive mechanism.

Abstract: An injector to deliver a predetermined quantity of liquid into an animal, said injector having a hollow body with a handle, an interacting piston and cylinder mounted within the body and cooperating to define a variable volume working space, an injector needle communicating with said space, a passage also communicating with said space to enable the delivery of liquid thereto, a shroud to selectively cover said needle, and wherein movement of said shroud beyond a predetermined position exposing said needle enables relative movement between the piston and cylinder to eject liquid through said needle.

Abstract: A controlled release composition for administering a therapeutic agent to a ruminant, using an intraruminal device, consists of a compressed tablet or bolus which comprises the therapeutic and a carrier material is formed from a non-tacky free flowing powder in which 90% of the particles are less than 100 .mu.

Abstract: An infusion pump for controllable long-term injection of solutions from a syringe which can be emptied in a controlled manner for use with medical drugs in large doses. The infusion pump has a holding device for at least one syringe and an actuating device for the piston of the syringe which is connected to an electrical control drive, and an electrical battery for the drive. The actuating device is provided with a storage device for mechanical work acting through a detent member in the sense of the drive. The electrical control drive is adapted to release a retarding device when switched on, and to actuate the retarding device when switched off.

Abstract: The invention relates to an automatic injection device comprising a discharge mechanism, a cartridge holder and a cartridge which is slidably accommodated in the holder, the cartridge comprising a glass ampoule having an injection needle connected thereto. A sheath of shrinkable plastic sheet is shrunk around the ampoule entirely or for the greater part.

Abstract: A multiple, metered dosage device having an elongated body provided adjacent one end with a compartment or an ampule to contain material to be dispensed, a piston movable against the material to discharge it from a nozzle, a rod-like plunger movable by a pressure device against the piston to discharge material and a combination stop and release unit movable intermediately of the ends of the body between depressed and elevated positions respectively to engage a pair of racks of teeth on the plunger and including first and second teeth respectively engageable with the racks of teeth sequentially to permit the pressure device to advance the plunger and piston in similar metered, precise or predetermined increments of feeding in discharge direction and then stop the feeding movement and maintain such stopped position until the stop and release unit next is depressed.

Abstract: A device for evacuating body fluids under sub-atmospheric pressure is disclosed using a suction device in which a constant force means is utilized to create substantially constant vacuum in a chamber of the suction device, and the device progressively fills with fluid drawn thereinto through a catheter or the like. The device includes an elongated cylindrical chamber with a movable piston therein and with peripheral seal means on the side wall of the piston to seal against the inner wall of the elongated cylindrical chamber to provide a seal thereat. An intake means to the cylindrical chamber is provided with a check valve therein which provides for only a unidirectional flow of fluid through the intake means.

Abstract: A viewer for optically inspecting the interior ear cavity having a tubular body with a passage having an open end adapted to be inserted into the ear cavity and a lens in optical alignment with the passage. A light mounted on the viewer operates to illuminate the passage and interior cavity adjacent the open inner end thereof. The viewer is used with a collector to manually collect liquid samples from the ear cavity. The collector has an elongated tube associated with a plunger that is spring biased to an out position. A releasable latch holds the plunger in an in position. When the latch is disengaged from the plunger the biasing spring moves the plunger to its out position thereby drawing fluid into the tube.

Abstract: A needleless hypodermic injector includes an elongated cylindrical casing defined by front and rear telescoping sections, with an injection orifice at the closed front end of the front section and a push button trigger at the rear end of the rear section. A piston slidably mounted in a cylinder in the front section of the casing moves rearwardly to define a medicine chamber for receiving medicine from a bottle directly or through a valve incorporated in the front end of the front casing section. The piston is moved rearwardly by an internally threaded collar on the externally threaded cylinder, the collar pressing against a bushing, which presses against disc springs in the rear section of the casing. A latch mechanism retains the bushing against the springs until the trigger is pressed, at which time the springs drive the piston forward to discharge the medicine from the chamber through the injection orifice.

Abstract: A system for the sequential infusion of medical solutions comprises a fluid source connected in fluid communication to a fluid flow device and having in the fluid line downstream from the fluid source a one-way check valve and a fluid access port. A spring activated syringe is connected into fluid communication with the access port to raise hydrostatic pressure downstream from the one-way check valve to prevent fluid flow therethrough during infusion by the fluid flow device of fluid from the syringe.

Abstract: A hose assembly for use to regulate flow from a dispensing device that provides a generally constant pressure on a liquid to be dispersed. The hose assembly includes a length of capillary tubing through which the liquid must pass as it is dispersed which has a length of at least 45 centimeters and a volume of less than about 0.25 cubic centimeters so that the assembly can provide a slow steady predetermined flow rate while containing a small amount of the liquid being dispensed.

Abstract: A viscous fluid timed infusion device having a cylindrical housing having an orifice in one end. A plunger is movable in the housing and spring means are operatively positioned in the housing to urge the plunger towards the orifice. A viscous fluid timing device controls rate of movement of the plunger towards the orifice.

Abstract: The invention relates to an automatic injection device comprising a discharge mechanism, a cartridge holder and a cartridge which is slidably accommodated in the holder, the cartridge comprising a glass ampoule having an injection needle connected thereto. A sheath of shrinkable plastic sheet is shrunk around the ampoule entirely or for the greater part thereof.

Abstract: A medical suction device is provided in which a constant force means is utilized to create substantially constant vacuum in a chamber of the suction device, as the device progressively fills with fluid being drawn thereinto from a catheter or the like. The fluid drawn into the chamber of the suction device is selectively dischargeable therefrom into a discardable receptacle that is attached through a drain valve to the chamber. Multiple, folded, discardable receptacles, each connected through a separate drain valve, are connected to the storage chamber of the suction device. The arrangement operates to effect isolation against transmittal of infection. The multiple discardable receptacles accommodate a high volume of discardable material, while the suction device apparatus is of low bulk and is provided with means to prevent exposing the suction chamber to atmosphere, and to atmosphere-borne contamination.

Abstract: A medical capsule device comprises a capsule body having a chamber formed inside and a communicating path for communicating the chamber with outside, a movable member arranged in the chamber and movable between a liquid-receiving position at which the volume of said chamber is made largest and a liquid-pushing position at which the volume of said chamber is made smallest, and a coiled operating member made of shape memory alloy heated by ultrasonic wave to move the movable member to liquid-receiving and -pushing positions selectively.

Abstract: An autotransfusion device having a rigid cylindrical housing with an end wall, a movable piston located in the housing, and a deformable collection bag attached between the end wall and the piston is disclosed. When the piston is moved towards the end wall, collapsing the collection bag, the piston is rotated to twist the collection bag and prevent the collection bag from being seized between the housing wall and the piston. The autotransfusion device also includes an automatic air purge unit and an auxiliary air purge unit which is used when the automatic air purge unit malfunctions. In order to facilitate the filling of the collection bag to capacity, a length to diameter ratio of 1.1 is preferred.

Abstract: A pipetting device serves to hold and actuate a detachably mounted syringe having a syringe body and a piston. The device is provided with means for adjusting the volumetric capacity of the syringe. The device comprises two racks and a pinion which is in mesh with both said racks and operable to move them in mutually opposite directions. The racks are connected to respective sliders, one of which is connected to a rod for actuating the piston of the syringe. A single actuating lever is provided for actuating the piston and is connected to the sliders by an actuating mechanism, which comprises a positively actuated transverse slider, which constitutes a stop member and in response to an automatic resetting of the actuating lever to its initial position is moved from the path of one of said sliders into the path of the other.

Abstract: An internally powered pump is surgically implanted to eject liquid under control of the experimenter. The pump reservoir is flexible and contains the liquid to be ejected. The reservoir is collapsed by a piston which is pushed by a compressed spring. The spring is released, step-by-step, by a pawl and ratchet mechanism. The pawl is magnetically responsive and pivots when a magnetic field is applied to the pump.

Abstract: A hypodermic syringe comprising a housing having a needle chamber and a sealed receiving chamber containing an injection liquid. A hollow needle is mounted for slidable displacement in the needle chamber in a retracted position. A first piston acts on the hollow needle for displacing it to an extended position in which the needle projects from the housing for piercing the skin. A second piston in the receiving chamber acts on the injection liquid to pressurize the same. An apparatus holds the first and second pistons in respective retracted position with a passage connecting the first and second chambers and also being provided with a closure normally closing the passage.

Abstract: A portable, compact, hygienic syringe apparatus employing a rigid transparent canister divided into upper and lower sections, each having a closeable cover. The lower section houses a flexible self-coiling tubing having one end releasably connected through a floor section into the upper fluid-containing section. A spring-loaded piston in the upper section is latched up while fluid is poured into that section. When the latch is released, the spring-loaded piston forces the fluid through the tubing.

Abstract: An improved manual pressure syringe for odontological use, includes a handgrip provided with a control lever, a barrel for a cartridge, and a bushing arranged on the longitudinal extension of the barrel. It also includes a shaft having a pushbutton at one end which is slidable in the bushing and acts on the piston of the cartridge, a thrust lever for the shaft operated by the control lever, and a coil spring arranged between the thrust lever and the bushing. The coil spring is formed of two end parts, the turns of which are of a larger diameter than that of the shaft, and an intermediate part, the turns of which are substantially of the same diameter as that of the shaft.