Abstract: A method and apparatus for controllably dispensing a fluid substance on a repetitive, variable basis utilize a piston-cylinder type handheld finger operated dispenser. The dispenser includes a generally cylindrical body for containing a supply of the fluid substance to be dispensed, a formed tip through which the fluid substance may be dispensed, a piston and a piston rod for use in dispensing the fluid substance from the cylinder and a formed gouge or actuator for initiating movement of the piston rod to dispense the fluid substance in amounts controlled by the skill and desire of the user. The actuator is formed from a harder material than the material used to form the piston rod so that gouges or teeth are formed by the actuator during usage along the length of the piston rod, the spacing between adjacent teeth being variably selected by the user. A specific application of the dispenser is for use in dispensing topical dental medicine by a user in his own oral cavity.

Abstract: A non-reusable hypodermic syringe consists of a barrel and a plunger, the plunger having first and second sections divided by a torque reacting point of rupture between them. Means is provided for causing relative rotation between one of the plunger sections and the barrel during the ejection cycle so as to create a torque differential between the sections which results in a rupture of the plunger at the torque reacting point at the end of the ejection cycle. A clutch mechanism is provided to disengage rotational motion from the plunger when liquid is being drawn into the barrel. The clutch engages or transmits rotational motion to the plunger when the plunger is moved in the other direction to eject liquid from the barrel.

Abstract: Disposable syringe for injecting fluids having a tubular body (1), a working stem (5) coupled to a piston (4), with a clearance between them, whereby movements of stem (5) determine relative corresponding displacements, of a determined length, between stem (5) and piston (4). A built-in tubular auxiliary element (8) is attached to the piston (4) and stem (5) by a sliding friction toothed attachment, which, depending on such relative displacements, advances within the syringe in uniform increments unidirectionally. Predetermined displacement of element (8) causes the syringe to become unserviceable. Built-in configurations (9), (13) and (14) prevent movement between the stem and piston as well as withdrawing of these elements from the body (1) until use of the syringe.

Abstract: A syringe comprising means making it possible to make the plunger (3) integral with the end (5) of the plunger stem (4) during the first filling, and to cause the disconnection between these elements during a refilling attempt.According to the invention, the connecting means between the plunger (3) and the stem (4) comprise an intermediate memorization member (6) formed such that, during filling, it ensures that these two elements (3, 4) are integral while the injection, that is to say the pressure on the plunger stem (4), causes the displacement of the intermediate member (6) relative to the two elements (3, 4) so that the latter become detached upon any second filling attempt.

Abstract: A syringe holder for administering the contents of prefilled cartridge-cannula units comprises generally a cartridge holding barrel rotatably connected to a push rod guiding sleeve, and a push rod slidably mounted in the sleeve.

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: The object of the present invention is a syringe the essential function of which is to avoid that it is used again after having been used once. This is achieved by means of a piston joined to a pusher which inside the cylinder of the syringe does not reach the end, as there has to be provided a second pusher situated preferably in the centerof same which separates the piston of the pusher resting the piston at the interior end of the syringe, and the pusher free. In order to avoid that the end joined to the needle be manipulated, there can be provided a fixed needle, or either a channel between the cylinder and the corkscrew needle, impossible to be manipulated.

Abstract: A single use hypodermic syringe uses a generally cylindrical elongated syringe body defining a center bore and supporting a hollow needle in communication with the center bore. A movable piston preferably formed of rubber or resilient plastic material is sealingly supported within the syringe bore. A driver member extends into the syringe bore and is coupled to the piston by a coupling which features upon a single use. Several embodiments of the single use coupling are shown which fraction to preclude any further use of the syringe once the fluid injection operation has been implemented by the syringe.

Abstract: A safety syringe having a double ended hypodermic needle cannula releasably retained at the distal bore of the syringe cylinder by a pair of jaws. A locking and positioning tip is attached to and movable reciprocally through the cylinder with a piston assembly. As the piston assembly is moved distally through the cylinder to expulse fluid therefrom, the proximal end of the cannula is deflected by and imbedded within the locking and positioning tip. The continued distal advancement of the piston assembly corespondingly drives the cannula and its jaws axially and outwardly from the distal bore of the cylinder, whereby the jaws release the cannula. When the piston assembly is moved proximally through the cylinder, the cannula is retracted within and shielded by the cylinder to avoid an accidental needle stick and render the syringe safe for handling and disposal.

Abstract: A connector for attachment of a plunger to a rubber piston in hypodermic syringe cartridge ampoules comprises a pin having a shank portion with a contiguous screw-threaded post portion and a ratchet head portion sized to rotatably fit within a cavity in said piston which thus prevents overtightening the plunger to the piston thereby obviating jamming of the piston in the bore of the cartridge.

Abstract: A single use hypodermic syringe uses a generally cylindrical elongated syringe body defining a center bore and supporting a hollow needle in communication with the center bore. A movable piston preferably formed of rubber or resilient plastic material is sealingly supported within the syringe bore. A driver member extends into the syringe bore and is coupled to the piston by a single use coupling. Several embodiments of the single use coupling are shown which function to preclude any further use of the syringe once the fluid injection operation has been implemented by the syringe.

Abstract: A non-reusable syringe is disclosed having a syringe barrel and a plunger assembly reciprocable in the barrel. The plunger assembly comprises a plunger rod and a piston member, arranged so as to allow limited relative movement with respect to each other. The plunger rod has a resilient blocking member capable of becoming engaged with recesses in the inside wall of the syringe barrel. A safety member is removably arranged between the barrel and the plunger assembly to prevent blocking of the plunger rod before use of the syringe and define a precise dose of the liquid to be injected.The present syringe offers practically absolute guarantee against re-use and allows better and quicker clearance of the air before the injection.

Abstract: A plunger having a generally converging distal portion, and a proximal face on which is mounted a coupling structure. The coupling structure is transversely engageable by, and transversely disengageable from, a driving mechanism of a power-driven angiographic syringe, and once engaged, cannot be disengaged by rotation of the driving mechanism relative to the plunger in the absence of transverse translational movement of the driving mechanism and plunger relative to one another. The coupling structure may include a pair of laterally spaced-apart retention members, each comprising a leg rearwardly extending from the proximal face of the plunger and joined at a rearward part thereof to a laterally extending bridge segment, to the inner extremity of which is joined a pair of oppositely transversely extending flexible, resilient flange elements.

Abstract: Self-destructive non-reusable injection syringes consisting of a cylinder 1 which has a needle 2 at one end. In the cylinder a plunger head 3 with a plunger shaft 4 is placed, and in connection with the plunger head 3 or the plunger shaft 4, a release mechanism 6 is made which is released after the first use of the syringe. The release mechanism 6 consists of pieces 10, 11, 12 with at least one steering knob 13 which runs along the syringe's axial sloping path or course 14 in another body 15. The path or course 14 is at one end joined to an axially running path 16 which is open at the end 17 of the body 15. A stopper 17 for the steering knob 13 is placed at the end of the path opposite the connection with the path 16. A freely revolving joint 7, e.g., a sphere, which moves freely in a socket is connected to the plunger shaft 4 or between the plunger shaft 4 and the plunger head 3.

Abstract: A single-use disposable hypodermic syringe is described in which a plunger is initially coupled to a piston to permit filling of the syringe with fluid. During the filling step, the plunger is constrained to only move in the outward direction as required for filling. In order for injection to occur, the plunger must be rotated into a second position in which the plunger is irreversibly decoupled from the piston. In this position, the plunger is constrained so that it may only move inwardly as required for injection. The plunger and plunger guide also include corresponding sets of ribs and detents which cooperate in a rachet action to restrict the direction of travel of the plunger. This restriction means that the plunger can be pulled out only once (to draw liquid into the syringe) and pushed in only once (to expel the liquid from the syringe). Since the plunger can no longer be recoupled to the piston, and also since the plunger is locked in its forward position, re-use of the syringe is rendered impossible.

Abstract: An improved non-resuable syringe comprising a barrel having one open end and one restricted end through which a liquid may pass, a piston is slidably positioned within the barrel, a shaft is positioned so as to be freely slidable within the barrel and has one end extending beyond the open end of the barrel, a connector has one end engaging the piston in rotatable relation thereto, and a guide means as formed on the exterior of the shaft so as to receive the other end of the connector and causing the connector to disengage from the shaft. The piston has an orifice at one end for receiving an arrowhead-shaped portion of the connector. The connector has a forked portion having inwardly formed pins for engaging guide slots in the exterior of the shaft. The shaft includes a cylindrical member connected to the shaft and a Z-shaped groove configuration formed on opposing sides of the cylindrical member. During use of the syringe, the pins on the connector follow the pathway of the formed groove on the connector.

Abstract: A syringe which can be used only once. The syringe includes a body having a fluid chamber, a plunger reciprocally movable within the chamber and a handle for moving the plunger within the chamber. Following the injection cycle, the handle automatically disconnects from the plunger rendering the device useless.

Abstract: A hypodermic syringe assembly includes an elongated container and a cup shape molded piston longitudinal movable in the container. The container has a sidewall, a needle receiving end, and a piston receiving end which terminates in a rim. The piston has an open rear end with at least three equally spaced integral hinged tabs therearound. The piston has a first position partially inserted at the container rear where the tabs extend radially outward from the container adjacent its rear end. The piston in this position can receive a disc shaped plunger head. The piston has a second position fully inserted in the container where the tabs are rotated about their hinges and extend radially inward within the container. In this position the piston tabs hold a disc shaped plunger head within the piston. The piston has a third position partially extended out of the rim of the dispensing container.

Abstract: In a syringe for injections, especially intravenous --being realized so as to be used only once and comprising a body making up the cylinder to which the needle is fitted, a piston sliding in said cylinder and a piston handling member (stem) for recalling the piston during the liquid aspiration phase and for pushing the piston during the injection phase--said piston and said handling member (stem) are engaged with one another in a non-rigid way, in order to neutralize a further aspiration operation after a first phase of piston push has been carried out.

Abstract: Apparatus for the delivery of light-curable composite dental filling material comprises a tubular composite reservoir, plunger and slider. The slider is free to move longitudinally along the reservoir but is matingly mounted to facets on the outside surface of the reservoir to prevent angular movement of the slider relative to the reservoir. The plunger consists of a shaft threaded to mate with the threaded inside diameter of the composite reservoir. The plunger also has a disk integrally formed to end of the shaft at one end and a male front piece at the other. The male front piece mates with a female fitting of a separate composite extrusion element.

Abstract: A dosing syringe has a cylindrical syringe body which at its tapering end has a dispensing orifice and at its other end a stepped cylindrical enlargement with two opposing handles. A recess is located below each handle, and a piston is inserted into the cylindrical syringe body. The piston is in contact with a dosing plunger having an external thread. Two threaded sides are arranged around the plunger and each threaded side has a positioning projection introduced into the recesses of the enlargement. According to the invention, the piston is connected to the dosing plunger by a spring retainer connection and the threaded sides have an outside groove in which an O-ring is inserted in countersunk fashion to hold the two threaded sides together. As a result, the piston-dosing unit can be prefabricated and introduced as a complete unit including the threaded sides into the enlargement of the syringe body where it is fixed simplifying the production technology of the dosing syringe.

Abstract: The invention relates to a holding and handling device of a syringe, which comprises a handle (1), a holding portion (2), two parallel guiding rods (3) rigidly linking the handle and the holding portion, and a gripping member (10) slidably axially mounted between both guiding rods and turning on itself around its central axia. A fixing plate (7) having a central opening is displaceably mounted parallel to the upper surface of the supporting plate (4) and is subjected to the action of springs (8) leading to maintain this fixing plate into contact with said supporting plate, in such a manner that in service position the peripheral edge (13') of the cylindrical body (13) of the syringe is maintained by jamming between the fixing plate and the supporting plate. Finally, the gripping member presents coupling openings (11, 11') cooperating in service position with the upper end (14') of the piston (14) of the syringe.

Abstract: A disposable disease control syringe which reduces the frequency of accidental needle strikes to health care workers and prevents health-threatening reuse of the needle cannula by drug abusers. The syringe includes a cylinder having an open proximal end, a closed distal end, and a needle projecting through the distal end. A piston assembly having a detachable stem and a needle capturing receptacle moves axially through the syringe cylinder to expulse fluid medication and to selectively engage the needle at the most distal aspect of the cylinder. The stem is then withdrawn from the cylinder through the open proximal end thereof, whereby to relocate the needle from the distal to the proximal cylinder end. The needle capturing receptacle is locked at the proximal end of the syringe cylinder, such that the needle cannula extends from the proximal end and is completely shielded by the cylinder.

Abstract: In an injection syringe for use once only the piston rod (4) is connected to the piston (3) by claws (9) which upon pressing of the piston rod (4) against the piston (3) during injection break or become deformed to such an extent that it is no longer possible to retract the piston (3) for the purpose of refilling the syringe. The deformation is effected by means of a conical portion (13) on the piston, said portion by wedge effect pressing the claws (9) radially outwardly when the piston rod (4) is pressed against the piston (3). The rigidity and strength of the claws (9) is adapted to the resistance experienced during injection of a liquid so that the claws will certainly be broken or otherwise brought out of engagement with the piston (11). On the other hand the force required to push the piston forward in an empty syringe does not have to be sufficient to break the claws (9).

Abstract: There is described a single use disposable hypodermic syringe which has a hollow cylindrical body closed at its front end and open at its rear end. A hypodermic needle is mounted in the closed end of the barrel eccentrically of the longitudinal axis thereof. Inside the barrel there is an inwardly directed lip extending around the inner circumference of the barrel and spaced from the closed end of the barrel and forming with the closed end, a pocket. A plunger is housed in the barrel and is freely reciprocal therein outside the pocket. The plunger has a resilient piston made of a medical rubber compound at its leading end and a plunger rod extends rearwardly of the piston through, and beyond, the end of the barrel and terminates in a flange to which thumb pressure is applied when administering medication with the syringe. The plunger piston is attached to the plunger rod by means of a breakable connection.

Abstract: A syringe for providing a tactile signal to a person who is directing a fluid to a vein of a patient, for local anesthesia administration where a specific infusion pressure should not be exceeded, and other uses where delivery pressure is critical. A biased pressure sensitive piston is interposed between the syringe plunger and an actuating thumb pressure element. When a preset pressure is reached in the syringe body, a projection reaches the thumb to alert the administering person that the preset pressure has been reached.

Abstract: A pistol grip syringe (10) with a removable fluid container (16) is described. A piston (18) in the container separates from a driving rod (19) when the container is removed from the collar (56). The container is removed from the collar by turning one-quarter turn or less to unlock ears 16a on the container from the collar. A wedge (58) holds the rod in position during dispensing and is unlocked to pull the piston rearward in the container. The container can be disposable and the unit is easily cleaned.

Abstract: The invention is directed toward a hand-held syringe actuator and removable syringe. The syringe acutator includes a stationary part which removably receives a flange of the syringe barrel and a movable finger part which removably receives a flange at the end of the syringe plunger. The finger grip is movable upon application of finger pressure, but is spring biased to urge the plunger into the syringe barrel. A valve operating stem, carried by the actuator, slidably extends through the finger grip and through the plunger, extending into the syringe barrel and terminating in a valve element. The valve element is sized to seat in a valve seat provided in the syringe barrel at the closed end of the barrel. A spring urges the valve member to remain seated on the seat. The device is constructed so that it can be held and manipulated by the use of only one hand.In one form of device, a latch is provided and can be activated to releasably hold the valve element off of its seat.

Abstract: A syringe for a power injector has an adapter with engaging and gripping means for being secured to the machine grippable protrusion of a backer plate of the piston of the syringe. The rear end of the adapter has a machine grippable protrusion so that the syringe, having its volume reduced by the length of the adapter, can be utilized in a conventional power injection machine.

Abstract: Disposable syringe made of plastics, for medical purposes, consisting of a barrel (1), a piston (2) provided with a plunger shaft (3) guided at a distance from the barrel wall, and a closure cap (4), the piston (2) being releasably joined to the plunger shaft (3). The piston (2) is at least partially softly resilient due to the fact that on the piston periphery wall parts of greatly reduced wall thickness are present. The closure cap (4) contains a sufficiently long, stable slide bearing for the plunger shaft (3), so that deformation of the latter, arising out of off-center application of force in the retracted piston position, and out of the tendency of the relatively thin plunger shaft (3) to bow or buckle, will not be transferred to the piston (2).

Abstract: A reusable syringe has a push rod with a threaded entrance hole in its tip end. The threaded hole leads into an inner capture area. A shot package includes a glass tube with a plunger having a stud with an interrupted thread for passing through the thread entrance hole and becoming captured in the inner capture area. When the rod is pushed, the stud transfers forces to the plunger without applying compression forces thereto. This way, the plunger does not expand and chatter against the glass tube wall, thereby risking breaking it. The inventive stud with interrupted thread is otherwise identical to prior art studs which are fully threaded. Thus, the syringe may receive and is fully compatible with both types of studs.

Abstract: A non-reusable syringe comprising a barrel having an open end and a restricted end, a piston slidably positioned within the barrel and forming a liquid-tight seal with the interior of the barrel, a shaft freely slidable within the barrel and extending beyond one end of the barrel, a connector engaging the piston and the shaft and having a protrusion extending therefrom, and a guide formed on the shaft for receiving the protrusion of the connector. The connector is detachable form the shaft. The connector comprises a collar holder fastened at one end to the piston and a collar freely rotatable about the collar holder. The guide comprises a groove formed on the shaft which engages the protrusion from the collar. The guide causes the shaft to be disconnected form the connector following an injection of a liquid from the syringe.

Abstract: A dispenser for liquids and viscous fluids has a syringe-like device with a barrel for containing fluid and a nozzle at one end. The plunger is movable axially in the barrel for discharging the fluid. At the inner end of the plunger is a flexible, elastic cap which has an end wall that is normally concave, but which is flattened out under pressure when the fluid is discharged. When pressure on the cap is removed, the cap reassumes its concave shape thereby creating a suction in the barrel which draws fluid back into the nozzle to prevent dripping.

Abstract: An angiographic injector has an injector portion which includes a rotating turret for housing two angiographic syringes in readiness for injection. The injector further employs a driving mechanism for connecting with and controlling the movement of a syringe plunger once one of the syringes is in place for injection. Through the use of guide means on each syringe and corresponding alignment means on a pressure jacket, the syringe is alignably and securely mounted within the pressure jacket on the rotating turret. Each syringe plunger is releasably connected to the driving mechanism for an injection operation, and released from the driving mechanism when the injection operation has been completed, such that the driving mechanism can be withdrawn from the syringe relative to the plunger without drawing body fluid of a patient into the syringe. Various types of plunger release mechanisms for this purpose are disclosed.

Abstract: An infusion pump has a removable reservoir including a piston and drive member. The drive member is an internally threaded elongated portion of the piston. A motor rotates a short drive screw, which engages the threads of the drive member to displace the piston in the reservoir. In one embodiment the piston is attached to the drive member by a severable central stem which breaks away to allow engagement with the drive screw. With the stem severed, the piston cannot be retracted, or the reservoir refilled. Other safety features are shown for locking the displaced piston in the reservoir. A digital metering system has a safety circuit to prevent dangerous failure modes of the rotation sensor and motor drive systems.

Abstract: A blood extraction cannula cap is provided with a skirt which can be inserted over a tube for receiving the blood, the upper portion of the skirt being closed and having a cannula bore for receiving a needle and a push button resiliently mounted on the end of the cap with the push button being connected to a closing member which closes a bore connecting the cannula to the interior of the cap.

Abstract: A syringe for a power injector has an adapter with engaging and gripping means for being secured to the machine grippable protrusion of a backer plate of the piston of the syringe. The rear end of the adapter has a machine grippable protrusion so that the syringe, having its volume reduced by the length of the adapter, can be utilized in a conventional power injection machine.

Abstract: A compact, prefilled, ready-to-use, applicator for dispensing a medicament within a body cavity has a reservoir, an automatically-opening closure member and a telescoping plunger assembly. A closure member is disclosed, adapted to open responsive to the pressure of a medicament being dispensed, without disengaging from the reservoir in which the medicament is contained. A telescoping plunger assembly is disclosed, having impeller means disposed within the reservoir opposite the cap member and engaging means to lock the assembly in an extended position for urging the impeller means through the reservoir.

Abstract: A syringe injector for injecting liquids into patients comprising a syringe barrel with a slidable piston therein and a driver slidably extending into the barrel bore from the open end thereof behind the piston, where the driver includes a power supply and drive means operated by the power supply to cause at least a portion of the driver to move relative to the barrel to engage and propel the piston toward the discharge opening in the syringe barrel.

Abstract: A medical pressure indicating injection gun for injecting fluid into a balloon catheter, with a visual indication of the balloon pressure. The injection gun includes a barrel adapted for attachment thereto the body of a syringe, and a bracketed coupling shaft for holding the syringe plunger. The coupling shaft includes pressure gauge marks thereon, and is slideable within a cylinder chamber on the end of a ratchet shaft, and in compression with a spring also in the chamber. A ratchet mechanism is employed for engaging teeth on the ratchet shaft and advancing the ratchet shaft forward, and through the spring the coupling shaft and attached syringe plunger are advanced as well. Pressure build-up in the balloon catheter causes the coupling shaft to retract into the cylinder chamber in compression with the spring and indicate by the gauge marks the balloon pressure.

Abstract: A multipurpose syringe for obtaining a blood sample and for storing and shipping it having a barrel (10), a plunger (32), and a rod (36), and means (40) (42) (44) for locking the plunger in retracted position.

Abstract: A plunger rod assembly for use with a syringe barrel comprises a plunger rod and a flexible thermoplastic stopper. A plunger rod includes an elongate shaft portion defining a longitudinal axis and having a tapered tip portion at the distal end thereof. The tapered tip portion includes a front portion at the distal end thereof and a circular tapered plunger rod wall connected to the front portion and having a convexly shaped surface. A flexible cup-shaped thermoplastic stopper includes an annular side wall and a continuous front wall connected to the side wall. An exterior surface of the side wall is larger in diameter than the syringe barrel inside diameter. The stopper interior includes an inside surface of the front wall and a tapered annular inside wall connected to the annular side wall and to the inside surface. The tapered annular inside wall and the inside surface define a cavity which has the tapered tip portion received therein.

Abstract: A syringe apparatus having a syringe barrel open-ended on a first end for receiving a piston therewithin for movement down the syringe barrel, and having on the second end a constricted neck portion with a bore therethrough in communication with the bore within the syringe barrel. There would be further provided a needle portion having an upper base for mounting the upper portion of the needle, with the needle slidable within the bore of the constricted neck portion, from a position retracted into the neck portion to a position movable out of the end of the neck portion for injection. There is further provided a first and second locking members. The first locking member allows locking engagement between the slidable piston within the barrel and the lower base portion of the needle, so that when in the locked position the needle moves in relation with the piston portion.

Abstract: A variable sealing pressure plunger rod assembly for use with a syringe barrel comprises a plunger rod and a flexible stopper. The plunger rod includes a rigid elongate shaft portion having a circular tapered tip portion at the distal end thereof. The flexible cup-shaped stopper includes an annular side wall and a front wall connected to the side wall. An exterior surface of the side wall is larger in diameter than the syringe barrel inside diameter. The stopper interior includes an inside surface of the front wall and a tapered annular inside wall connected to the side wall and to the inside surface. This tapered annular inside wall and the inside surface define a cavity which has the tapered tip portion received therein. The tapered annular inside wall and the tapered tip portion are inclined at approximately the same angle and adjacent to each other. Cooperating structure for maintaining the positional relationship of the stopper and the plunger rod is also provided.

Abstract: A blood extracting and centrifuging device has a cylindrical body 1 with front and rear ends 2, 3. The front end is adapted to receive a removable cannula 4 and a piston 8 is sealingly movable within the cylindrical body 1. A piston rod 9 attached to the piston 8 extends through a bore 10 at the rear end of the cylindrical body and is used to retract the piston, from an advanced position adjacent the front end to a retracted position adjacent the rear end, whereby to generate a vacuum in the cylindrical body 1 for extracting blood via the cannula 4. Securing means in the form of an annular retaining projection 22 on one of the piston 8 and the piston rod and an annular lip 24 at the rear end of the cylindrical body 1 are provided to secure the piston to the cylindrical body in its retracted position. After a blood sample has been taken the piston rod 9 can be removed and the cylindrical body 1 inserted directly in a centrifuge without the need to transfer the blood to a centrifuging vessel.