Syringe plunger rod mount
First Claim
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1. A syringe device, comprising:
- a vial for medicaments having a first open end and a penetratable seal at its opposite second end, said first end having a plunger tip;
finger grip means mounted adjacent said first end;
an elongated hollow plunger rod movable axially in the vial to a final discharge position when medicament is discharged, said hollow plunger rod having a first engagement means on one end for engagement with said plunger tip, said hollow plunger rod having first locking means located adjacent its open end for inserting a spent needle interiorly of the hollow plunger rod;
needle hub means for mounting a needle on said second end in axial alignment with said seal actuatable axially between an unarmed position spaced from said seal and an armed position penetrating said seal to access contents of said vial; and
means defining a cavity and an annular rib in said finger grip means and said hollow plunger rod having a radially outwardly directed disk portion which is sized to snap fit into said cavity behind said rib when said hollow plunger rod is actuated to said final discharge position such that the end of said hollow plunger rod is flush with said finger means grip.
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Abstract
A syringe device has a vial for medicaments having a first open end at a scaled second end. The first end having a plunger tip for sealing the end and has a finger grip means mounted adjacent the first. The needle and hub is slidably mounted on a needle on the second end in axial alignment with the sealed end to position said needle for access to the vial. The plunger rod has a first engagement on one end for engagement with the plunger tip and mounting means for detachably mounting the plunger between the finger grip and the hub to prevent access to the vial when the plunger is mounted thereon.
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Citations
3 Claims
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1. A syringe device, comprising:
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a vial for medicaments having a first open end and a penetratable seal at its opposite second end, said first end having a plunger tip; finger grip means mounted adjacent said first end;
an elongated hollow plunger rod movable axially in the vial to a final discharge position when medicament is discharged, said hollow plunger rod having a first engagement means on one end for engagement with said plunger tip, said hollow plunger rod having first locking means located adjacent its open end for inserting a spent needle interiorly of the hollow plunger rod;needle hub means for mounting a needle on said second end in axial alignment with said seal actuatable axially between an unarmed position spaced from said seal and an armed position penetrating said seal to access contents of said vial; and means defining a cavity and an annular rib in said finger grip means and said hollow plunger rod having a radially outwardly directed disk portion which is sized to snap fit into said cavity behind said rib when said hollow plunger rod is actuated to said final discharge position such that the end of said hollow plunger rod is flush with said finger means grip.
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2. A syringe device, comprising:
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a vial for medicaments having a first open end and a penetratable seal at its opposite second end, said first end having a plunger tip; finger grip means mounted adjacent said first end; needle hub for mounting a needle on said second end in axial alignment with said seal actuatable axially between an unarmed position spaced from said seal and an armed position penetrating said seal to access contents of said vial; an elongated hollow plunger rod movable axially in the vial to a final discharge position when medicament is discharged, said hollow plunger rod having a first engagement means on one end for engagement with said plunger tip, said hollow plunger rod having first locking means located adjacent its open end and said needle hub means having complementary second locking means whereby a spent needle can be inserted interiorly of the hollow plunger rod and the locking means interengaged to safely hold the spent needle in place in the hollow plunger rod; and means defining a cavity and an annular rib in said finger grip means and said hollow plunger rod having a radially outwardly directed disk portion which is sized to snap fit into said cavity behind said rib when said hollow plunger rod is actuated to said final discharge position such that the end of said hollow plunger rod is flush with said finger grip means.
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3. A syringe device, comprising:
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a vial for medicaments having a first open end and a penetratable seal at its opposite second end, said first end having a plunger tip; finger grip means mounted adjacent said first end; needle hub for mounting a needle on said second end in axial alignment with said seal actuatable axially between an unarmed position spaced from said seal and an armed position penetrating said seal to access contents of said vial; an elongated hollow plunger rod movable axially in the vial to a final discharge position when medicament is discharged, said hollow plunger rod having a first engagement means on one end for engagement with said plunger tip, said hollow plunger rod having first locking means located adjacent its open end and said needle hub means having complementary second locking means whereby a spent needle can be inserted interiorly of the hollow plunger rod and the locking means interengaged to safely hold the spent needle in place in the hollow plunger rod; and means defining a cavity and an annular rib in said finger grip means and said hollow plunger rod having a radially outwardly directed disk portion which is sized to snap fit into said cavity behind said rib when said hollow plunger rod is actuated to said final discharge position such that the end of said hollow plunger rod is flush with said finger grip means.
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Specification