A syringe comprises a barrel (1) having a plunger (7) in slidable and sealing engagement therewith. In order to provide an autodestruct system, so that the syringe can be used once only, being rendered disabled after one normal use, the barrel (1) has means interrupting the cylindrical surface of its inner wall in the form of grooves (10, 11) or a projection (29), and the plunger (7) has a locking means (17, 20) which operates on engagement with a groove (10, 11) or projection (29) on withdrawal...

A syringe comprises a body member detachably secured onto one end of a syringe barrel provided at its other end with a delivery tube and containing a movable piston member; a piston actuating assembly movably mounted in the body member and comprising a tube generally coaxial with the barrel and a rod movably mounted within the tube; and a pawl for moving said piston actuating assembly whereby the tube is first displaced to move the piston to the distal end of the barrel and the rod is then moved...

A tubular guard is provided by this invention which can be telescoped over the barrel of a syringe or other device carrying a needle adapted for injection or removal of fluid of a patient or animal and which can be locked into barrel covering position thereover, means whereby locking engagement of the guard and the barrel may be broken, guide means for guiding the guard into telescoped needle or nozzle surrounding position after use of the syringe, said guard being adapted to be maintained into ...

A syringe has a barrel 1 housing a plunger 8 linked to a piston incorporating a seal 7 by a coupling member 9. A flange 12 on the coupling member 9 limits the extent of movement of the plunger and piston assembly, in association with latches 16. As the plunger 8 is operated through a sequence of expelling air from the syringe, to draw in liquid into the syringe and then to eject the liquid out again through a needle connected to an outlet 5, camways 11 at the ends of the coupling member 9 operat...

A syringe, especially for measuring microliter amounts, which comprises a barrel having over at least a part of its length an inner liner composed of a resilient plastics material surrounding a bore and a piston slidable within the liner bore, the maximum cross-sectional area of the piston being slightly greater than the cross-sectional area of the undeformed bore. The liner is preferably made of a polytetrafluoroethylene and the piston comprises a wire with a bead at one end. A method of attach...

A syringe (1) contains a liquid medical substance which has to be mixed with another substance before use. This is done by interconnecting the syringe (1) and a capsule containing the other substance by a transfer device (2) which screws into a socket (4) in the piston-seal (3) of the syringe (1) and penetrates through into the liquid. The device (2) extends slidably but non-rotatably through a screw cap (8) which fits to the rear end of a housing (13) for the syringe (1). As the cap (8) screws ...

This invention contemplates a liquid filled sealable flexible bag having a manipulative discharge tube or nozzle. As a vaginal douche the discharge tube is removably equipped with a vaginal fitting which telescopically engages the tube. Positive closing means of the discharge tube is provided. The filled and plugged bag, complete with vaginal fitting, may be encased in a sealed envelope which in turn is conveniently accommodated in a purse-like flexible case. To use the device after breaking the...

The improvements in shielded safety syringes described herein provide a safe and simple mechanism to reduce and preferably eliminate accidental needle-stick injuries. The improvements described herein further provide a safe and simple means to prevent unauthorized reuse of the syringe. The improved syringe of the present invention locks the needle assembly in the shield member after use, preventing reuse and accidental needle-stick injuries.

The invention is concerned primarily with a piston action pump/syringe usable for veterinary work in particular (but not confined to this use) for the dispensing of metered doses of liquids or pastes, and includes a cylindrical body reciprocally housing a piston end of a co-axial plunger which extends outwardly from the body, the plunger and piston end having a common bore through which the body contents can be dispensed. The outlet end of the plunger, which is provided with a nozzle, has a nove...

This invention contemplates a liquid filled sealable flexible bag having a manipulative discharge tube or nozzle. As a vaginal douche the discharge tube is removably equipped with a vaginal fitting which telescopically engages the tube. Positive closing means of the discharge tube is provided. The filled and plugged bag, complete with vaginal fitting, may be encased in a sealed envelope which in turn is conveniently accommodated in a purse-like flexible case. To use the device after breaking the...