Abstract: A blood-collection apparatus has a needle having a sharp front end and a sharp rear end, a mounting collar on the needle between its ends and a holder tube extending along an axis and having front and rear ends. A piston axially slidable in the holder tube is provided with a mount adapted to fit complementarily with the mounting collar with the needle rear end directed axially back in the tube. The piston normally is at the tube front end with its mount projecting axially forward from the tube. A flexible strand has a front end attached to the piston and a rear end projecting from the tube rear end. This mount is fitted into the needle's collar after the blood-collection operation is complete so that a pull on the strand retracts the piston back into the tube carrying the needle fitted to its mount.

Abstract: A filter is pressed down in a collection tube holding separated blood as a lower solids mass and an upper liquid mass defining with the lower mass an interface. The filter has a sleeve fittable in the tube and having a lower end covered by a membrane that fits snugly in the tube. A vertical level of an upper surface of the upper liquid mass in the tube is detected and a pusher is engaged with an upper end of the sleeve to push the filter downward in the tube. Downward pushing of the filter is stopped when the upper end of the sleeve is at a predetermined spacing above the vertical level of the liquid upper surface. A vertical level of the interface is also detected and downward pushing of the filter is also stopped when the membrane is at the vertical level of the interface. Thus two separate events can trigger stopping of the downward pushing: reaching the interface or reaching a certain fill level in the sleeve.

Abstract: A sample vessel (1) for taking very small amounts of blood, consisting of an outer vessel (2) and an inner vessel (3) which can be inserted into it, which is closed at the bottom, and on top, on the side where the sample is deposited, is configured with an open, very thin-walled blood sample ring (7) which can be closed by a stopper (4) and which protrudes in situ from the outer vessel (2). The outer vessel (2) has a collar (5) which supports the inner vessel (3) below the blood sample ring (7), and which is suitable for holding in centrifuges. The sample vessel makes taking blood samples easier, is simpler to produce and offers a greater variety of possibilities for use.

Abstract: A cap for a blood-sampling tube has a collar adapted to fit on the tube and a tubular extension extending from the cap, defining an axis and having an outer end remote from the cap. An annular wall is formed inside the cap spaced from the outer end and an annular lip projects axially backward from the outer end and has an outer surface spaced radially inward of an inner surface of the extension and an axially directed inner end. A pierceable flat membrane in the extension on the annular wall snugly engages the inner surface of the extension and has an outer face spaced axially from the inner end of the lip. The lip has an inner surface defining a cylindrical passage of a predetermined diameter and the wall has an inner edge defining a similarly dimensioned coaxial annular passage.

Abstract: A molding apparatus has a fixed mold part having a pair of flat side faces and formed on each face with a plurality of laterally open half cavities and respective movable mold parts each having a side face juxtaposed with a respective fixed-part side face and displaceable transversely into and out of a molding position with the movable-part side face flatly engaging the respective fixed-part side face of the stationary mold part. Each movable mold part is formed with a plurality of half cavities forming full mold cavities with the half cavities of the respective fixed-part side face in the molding position. Each movable-part half cavity is formed with at least two inwardly open pockets, one of the pockets of each movable-part half cavity being open at the respective movable-part side face and being transversely closed by the respective fixed-part side face.

Abstract: A blood-tube cap has a generally tubular collar having a front end adapted to fit with a needle holder and a rear end adapted to fit with a blood tube and forming an axially extending passage between its ends, a pierceable membrane in the passage adjacent the front end, a flow-calming body in the passage rearward of the membrane, and a coating of a blood-reacting substance on the body. The passage is generally cylindrical and centered on an axis and the body is wedged in the passage. Furthermore the body is of cruciform cross section so as to leave spaces around itself through which the blood can flow, while effectively contacting the coating substance.

Abstract: For the removal of a small amount of fluid, in particular blood, from a sealed container, and the deposition of a drop of fluid on a slide by a dropper, and the subsequent spreading of the drop, the rear end of a dropper needle having a longitudinal channel which passes therethrough is pressed through a seal into a container. Once the needle is inserted into the container, a drop of fluid moves out of the container via the longitudinal channel to a slide. After depositing the drop of fluid on the slide, the dropper itself is used to spread and distribute the drop of fluid on the slide, so that spreading of the drop of fluid is facilitated and hazardous waste is reduced to a minimum. The dropper used for this purpose is made integral with a spreader.

Abstract: A blood withdrawal device has a withdrawal tube 2, a stopper 14 which closes the front end of the tube, can be pierced, and is retained by a stopper cap 5 which overlaps the tube with a collar 15, and a double cannula 3 which receives the stopper cap in a guide sleeve 4. The stopper cap or the guide sleeve has at least one prominence 17 which at least indirectly deforms the stopper cap in the collar region when this is pushed into the guide sleeve, the guide sleeve is rigid and at least the prominence of the stopper cap is non-rigid, preferably flexible. By this means, on the one hand secure holding of the guide sleeve and stopper cap is possible, without a catch or screw connection, and on the other hand it is possible, in a simple, gentle manner, to couple or connect several withdrawal tubes one after another to a cannula remaining in a vein, without jerking, and to fill several withdrawal tubes with blood.

Abstract: A blood extraction device features an extraction cylinder (11) having a forward end for attaching a needle (12) and a rear end having an opening (13) for a piston rod (14) together with a piston (15) secured to the forward end of the piston rod (14) arranged to slide axially in the extraction cylinder (11). The piston (15) can essentially be moved only in the direction away from the foward end of the extraction cylinder (11) and practically incapable of being moved when subjected to a force in the direction of the forward end due to one-way coacting means of prevention (17 , 18).

Abstract: A blood extraction device has a cannula (11) the front end of which can be stuck into the vein of a patient and the rear end (11") of which stands in flow communication with the interior of a sample tubule (12) which is hermetically closed at its rear end (12") and is closed at its front end, apart from an air vent (13, 13'). An inner tube (14) extending into the interior of the sample tubule (12) sealingly adjoins the rear end (11') of the cannula (11) and has an internal cross-section such that during the taking of blood a continuous blood column (15) is pressed from the rear end (11") of the cannula (11) into the internal tube (14) and does not break away in any position of the sample tubule (12) relative to the direction of gravity, i.e. even when the tubule is arranged beneath the cannula (12), at least so long as the cannula (11) is inserted in the vein (16).

Abstract: The object of the invention is a blood extraction device comprising a cannula (1) for insertion at its front end into the vein of a patient, the rear end (1') of the cannula opening in an inner tube (2) located in the interior of a sample tubule (3), which is closed hermetically at its rear end and closed at its front end except for an air bleeder (4). In the blood extraction position the inner tube (2) is secured against withdrawal out of the sample tubule (3) by means of a cap (5) having releasable axial locking means (6), preferably by means of a screw cap. A perforatable and self-closing membrane (7) is arranged in the front portion of the cap (5); this membrane sealingly closes the inner tube (2) at its front end (8) in the blood extraction position and simultaneously pushes the inner tube (2) without play against an abutment in the sample tubule (3).

Abstract: A blood extraction device features an extraction cylinder (11) having a forward end for attaching a needle (12) and a rear end having an opening (13) for a piston rod (14) together with a piston (15) secured to the forward end of the piston rod (14) arranged to slide axially in the extraction cylinder (11). The piston (15) can essentially be moved only in the direction away from the forward end of the extraction cylinder (11) and practically incapable of being moved when subjected to a force in the direction of the forward end due to one-way coacting means of prevention (17, 18).

Abstract: A blood extraction device comprises an evacuatable extraction tube (11) which is open at one end and onto which a closure cap (12) can be detachably fitted which carries a cannula cone (14) which projects forwardly parallel to the tube axis (13) and extends concentrically into a cylindrical extenion (15) having a smaller diameter than the extraction tube (11) and constructed as rearwardly open tube and which consists of a rearwardly open stiff sleeve (20) closed at the front except for a needle passage opening (19) and a counter piece (21) adapted to be fitted sealingly onto the cannular cone (14) and having a passage (22).

Abstract: A blood storage device consists of a blood extraction tubule (20) and a removable cover (12) which closes its upper opening. The cover (12) consists of a closure member (21) with a small opening (14) and a slider (13) arranged in the closure member (21) by means of which the passage of air from the inner space (17) of the blood extraction tubule (20) through the opening (14) can be interrupted.

Abstract: A blood extraction device includes a sample extraction tube having an open rear end and a first sealing surface at the rear end. A piston assembly includes a piston removably housed within the tube for movement between a retracted position toward the rear end and an extended position. The piston assembly also includes a piston rod portion extending through the open rear end of the tube. The piston rod portion has a reduced diameter portion along a substantial part of its length and an enlarged portion which defines a second sealing surface for complementary mating engagement with the first sealing surface when the piston is at its extended position. The piston is locked in its fully retracted position by the engagement of a forwardly facing annular flange on the piston assembly and a rearwardly facing annular step of the tube.

Abstract: A blood storage device consists of a blood extraction tubule (20) and a removable cover (12) which closes its upper opening. The cover (12) consists of a closure member (21) with a small opening (14) and a slider (13) arranged in the closure member (21) by means of which the passage of air from the inner space (17) of the blood extraction tubule (20) through the opening (14) can be interrupted.

Abstract: A blood sedimentation apparatus has an upright transparent sedimentation tube (11) which can be inserted into a sample container (32) containing blood and which can filled with blood up to a zero mark (13) provided in the upper region by displacing the blood contained in the sample container. A closure (12), which includes an overflow vessel (24) and a hollow spigot (14) which communicates therewith, and which extends from above into the sedimentation tube up to the zero mark (13) can be placed onto the upper end of the sedimentation tube (11). A closure member (15) which closes the opening (16) of the hollow spigot (14) can be introduced axially into the hollow spigot (14).

Abstract: An arrangement for placing a separating gel between two phases of different specific gravity located in a sample tube has a container (11) in which a separating gel (16) is accommodated. The container (11) which can be inserted into the sample tube up to the bottom thereof has a closed base (13) and a lid (14) at the top which can be displaced within the container in the manner of a piston. The lid is provided with at least one discharge opening (15) which is small relative to the area of the lid. The specific gravity of the lid (14) is greater than that of the separating gel (15) (FIG 3).

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.

Abstract: A blood extraction device is disclosed herein, which is an improvement over similar devices having a cylindrical extraction tube enclosing an air-tight piston and sealed with a closure cap having an axial projection which contains a self-sealing puncturable plug and is received within a movable tubular guide sleeve containing a double-ended cannula the rear end of which is enclosed by a deformable but resilient thin hose with a closed self-sealing rear end. The improvement resides in the inclusion of one or more slots on the guide sleeve and cooperating lugs on the projection, or vice versa, each slot having an axially extending portion and a peripherally extending portion, such that rotation of the rear cutting edge of the cannula is prevented during penetration of both the rear end of the hose and the plug, and rotation is possible only when penetration is complete.