Other

Robert Malenchek

Edwin William Bolz

A safety syringe is provided which includes a shield and a barrel mounted for reciprocating movement within the shield. The safety syringe includes a hub sized and shaped so as to be attached to the barrel and a ring rotatably mounted to the hub. The ring includes a tab that cooperates with the grooves in the interior wall of the shield for locking the barrel within the shield so as to allow for a single use of the safety syringe.

Adaptor for converting a non-safety syringe into a safety syringe

A safety syringe is provided which includes a housing and a barrel mounted for reciprocating movement within the housing. A ring is mounted to the barrel and is rotatable relative to the housing and to the barrel. The ring includes a plurality of tabs circumferentially spaced from each other. An interior wall of the housing includes a plurality of ramps and a plurality of stops. The ramps cooperate with the tabs of the ring so as to rotate the ring relative to the housing and to the barrel, while the stops cooperate with the tabs for stopping the rotation of the ring relative to the housing and to the barrel. Locking means is also included within the interior wall of the housing for locking the barrel so as to allow for only a single use of the safety syringe.

Safety syringe

A thermoplastic molded housing has a cylindrical bore with axial grooves and inclined camming surfaces extending about the bore surface. A plastic molded vial for receiving injectable fluid in a cavity receives a plunger therein for dispensing the fluid and for displacing the vial. The vial has a ratchet member with fixed ratchet teeth and tabs about its circumference which tabs and teeth form camming surfaces which cooperate with the housing camming surfaces. The tabs are aligned for reciprocating in the housing bore grooves. A ring is secured captured to the vial for rotation about the vial and for limited axial displacement along the vial longitudinal axis. A spring urges the ring and vial to the retracted position. The ring has tabs with camming surfaces for selectively engaging the grooves and the camming surfaces of the ratchet member tabs, ratchet teeth and housing bore camming surfaces to selectively position the vial and the needle attached thereto from a needle retracted position enclosed by the housing bore to an extended needle use position and for retracting the needle and vial to a permanent retracted position in response to depression of the plunger and vial or displacement of the vial alone and to the spring force on the ring.

A syringe tubular body forms a fluid receiving chamber having a restricted opening at one end for receiving a hollow needle and a wider opening at the other end for receiving a tubular plunger. The plunger has resilient fingers at its distal end which is inserted into the body chamber and an annular groove in one embodiment adjacent the proximal end. The fingers have inwardly extending hook-like projections. A piston assembly includes a body with an annular groove which releasably receives the projections for securing the piston assembly to the plunger during injection, the piston assembly including an elastomeric disc piston sealingly engaged with the tubular body chamber sides. A sleeve is external and movable along the body and is next adjacent the disc. The sleeve has an annular groove which is selectively engaged by the projections. The sleeve has an axial extent greater than that of the piston assembly body groove. When the piston is fully inserted into the chamber during injection, further displacement forces the disc piston against the chamber bottom permitting the finger projections to be forced out of engagement with the piston assembly body groove and into locking engagement with the sleeve groove, or in the alternative, to break away. When the plunger is withdrawn from the chamber, the engaged sleeve is withdrawn therewith and precludes the projections from engaging the piston assembly body groove leaving the piston in the chamber to preclude further use of the syringe tubular body. When the projections break, the piston is also left in the body chamber.

Non-reusable syringe

An inner cylindrical member has a pair of opposing axially extending tapered slots extending toward an end distal the other proximal end to which a needle is secured for blood collecting. A pair of tabs protrude from the distal end to permit the member sides at the distal end to be squeezed together. Temporary locking projections on the inner member sides at the distal end are engaged with locking holes on an outer nested concentric cylindrical member. The squeezing action releases the temporary locking engagement. Other projections and locking ramps are on the inner member at the proximal end for engaging the locking holes on the outer member. Guide channels are in the outer member inner wall engaged with the inner member proximal projections and ramps for guiding these elements as the outer member is axially displaced from a needle use mode overlying the inner member to a needle protection mode cantilevered from the inner member.

Needle protective sheath device

A thermoplastic housing formed of two mirror image halves snap fitted together has first and second resiliently cantilevered channeled ramps each having mating halves on opposite sides of a housing chamber. The ramps are on first and second angularly spaced axes aligned with a first needle receiving opening. A needle extends from a cylindrical body having an enlarged collar, the body being received between the first ramp halves with the needle protruding through the opening from the housing chamber and the collar restrained by the first ramp halves at corresponding coplanar collar edges. A spring surrounds the needle and abuts the body and housing urging the collar into axial locked engagement with the oppositely spaced first ramp halves. A cam displaces the body to the second axis wherein the spring forces the body rearwardly until the collar engages the edges of the halves of the resilient second ramp and a shoulder formed in the housing placing the needle wholly within the chamber and locking the needle assembly in opposite axial directions.

Needle protective device

A safety syringe has a hollow shield with a plunger opening on one end and a needle opening on the other end. At least one locking lug is mounted at the plunger opening. The syringe also has a lumen that is telescopically mounted at least partially within the shield. The lumen has a catch for engaging the locking lug. A needle attached to the lumen is aligned with the needle opening of the shield. An urging means is mounted in the shield to urge the lumen and to retract the needle into the shield. A plunger has an inner end slidably mounted in the lumen and an outer end mounted through the plunger opening. The outer end of the plunger has an extension for engaging and deflecting the locking lug to release the catch, which allows the urging means to retract the needle into the shield.

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Somerville, NJ, United States of America

Robert Malenchek