Abstract: A hypodermic-syringe assembly comprises a hard tubular body centered on an axis and having an axial front end formed with a radially inwardly projecting annular ridge and an axial rear end, a piston axially slidable in the body and normally adjacent the rear end, and a soft plug fitted in the front end in tight engagement with the ridge. The plug is formed with an axially rearwardly open blind passage having a front floor, and a front face defining with the passage floor a relatively thin membrane. Thus a needle can be poked through the membrane.

Abstract: A hypodermic syringe assembly has a hollow body having a neck centered on an axis, an elastomeric plug fitted in the neck and having an end projecting axially forward from the neck, a stiffening sleeve fitted over the plug and neck and having a collar fitting around the projecting plug end and itself projecting axially therepast, an elastomeric stopper fitted into the collar, and a protective cap fitted over the plug, sleeve, and stopper. A destructible connection between the cap and the sleeve retains the cap in place on the body over the plug, sleeve, and stopper. This cap is therefore only removable from the body by destruction of the connection. The protective cap is basically cylindrical and centered on the axis and has a front end wall generally transverse of the axis and an opposite rear end edge and the destructible connection extends annularly between the end edge of the cap and the sleeve.

Abstract: A hypodermic syringe has an elongated tubular body having a front end adapted to carry a needle, a rear end, and a bypass between the ends. A front partition piston defines with the front end a front compartment adapted to hold a substance and a rear piston defines with the front piston a rear compartment adapted to hold a fluid miscible with the front-compartment substance. The front piston is displaceable into a middle position in the bypass for fluid communication between the compartments. A stem projecting rearward out of the body from the rear piston is provided with axially spaced front and rear external screwthreads and has a clear region between the screwthreads. A damper on the rear end of the body can engage the screwthreads for slowing axial movement of the screwthreads past the rear end of the body and for permitting relatively rapid axial movement of the stem in the body when the clear region is level with the damper.

Abstract: A hypodermic syringe has a generally cylindrically tubular body extending along an axis and having an axial front end formed with a radially outwardly projecting annular bead, a piston axially displaceable in the body, a plug having a rearwardly directed flange fitting complementarily over the front end of the body at the bead and forwardly blocking the body, and a flat soft seal ring compressed axially between the plug and the front end of the body. The body has a rear end provided with a finger-rest crosspiece and the piston is provided with a plunger projecting axially out the rear end past the crosspiece.

Abstract: The syringe has a needle-attachment piece which forms a connection neck for affixing the syringe needle and which is held at the cylinder nozzle of the syringe cylinder by a connection piece notched in at the cylinder nozzle. The connection piece is provided with a collar which externally surrounds the connection neck sealing it tightly and mechanically stiffening the same, so that the syringe needle can be held in a stable manner, even when the needle-attachment piece is made of a soft elastic material, in order to provide a perfect seal.

Abstract: An automatic washer for cleaning objects, particularly hands, comprises a housing substantially enclosed on all sides with at least one opening for introduction of the objects to be cleaned, at least one nozzle, preferably a plurality of nozzles, for admitting at least one cleaning medium, whereby the nozzles are aligned and oriented appropriately to clean the surfaces of the object to be cleaned positioned in the interior of the housing, a control device detecting and responding to characteristics, particularly the shape, orientation, and position, of the object inserted into the interior of the housing to be cleaned, so as to activate the cleaning process when those characteristics correspond to those preset in the control device, and an operating mechanism which monitors and controls the method and timely running of the cleaning process.