Syringe assembly with pivoting plunger and integral tip guard
First Claim
1. A syringe assembly, comprising:
- a syringe barrel having an inside surface defining a chamber, an open proximal end, and a distal end having an opening therethrough;
an elongated plunger rod extending between a first end and a second end;
a guard disposed on the first end of the plunger rod; and
a plunger head extending within the chamber of the syringe barrel, the second end of the plunger rod interconnected with the plunger head through a pivotable connection,wherein the plunger head is adapted for slidable movement within the syringe barrel between the proximal end and the distal end,wherein the plunger rod is adapted to pivot with respect to the plunger head between a first position in which the guard is adjacent the distal end of the syringe barrel and a second position in which the plunger rod is in general axial alignment with the syringe barrel, and is further adapted for axial movement so as to cause said slidable movement of the plunger head through the syringe barrel, andwherein the guard is adapted to cover the opening in the distal end of the syringe barrel when the plunger rod is in the first position.
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Accused Products
Abstract
The invention provides a syringe assembly comprising a syringe barrel having an inside surface defining a chamber, an open proximal end, and a distal end having an opening therethrough. An elongated plunger rod extends between a first end and a second end, with a cap or guard disposed on the first end of the plunger rod. A plunger head extends within the chamber of the syringe barrel, and is adapted for slidable movement within the syringe barrel between the proximal end and the distal end, with the second end of the plunger rod connected with the plunger head through a pivotable connection. The plunger rod is adapted to pivot with respect to the plunger head between a first position in which the guard is adjacent the distal end of the syringe barrel and a second position in which the plunger rod is in general axial alignment with the syringe barrel, and is further adapted for axial movement so as to cause sliding movement of the plunger head through the syringe barrel to expel contents thereof.
31 Citations
36 Claims
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1. A syringe assembly, comprising:
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a syringe barrel having an inside surface defining a chamber, an open proximal end, and a distal end having an opening therethrough; an elongated plunger rod extending between a first end and a second end; a guard disposed on the first end of the plunger rod; and a plunger head extending within the chamber of the syringe barrel, the second end of the plunger rod interconnected with the plunger head through a pivotable connection, wherein the plunger head is adapted for slidable movement within the syringe barrel between the proximal end and the distal end, wherein the plunger rod is adapted to pivot with respect to the plunger head between a first position in which the guard is adjacent the distal end of the syringe barrel and a second position in which the plunger rod is in general axial alignment with the syringe barrel, and is further adapted for axial movement so as to cause said slidable movement of the plunger head through the syringe barrel, and wherein the guard is adapted to cover the opening in the distal end of the syringe barrel when the plunger rod is in the first position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A syringe assembly, comprising:
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a syringe barrel having an inside surface defining a chamber, an open proximal end, and a distal end having an opening therethrough; an elongated plunger rod extending between a first end and a second end; a guard disposed on the first end of the plunger rod; and a plunger head extending within the chamber of the syringe barrel, the second end of the plunger rod interconnected with the plunger head through a pivotable connection, wherein the guard is positioned to cover the opening in the distal end of the syringe barrel. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. A method of dispensing a fluid, comprising:
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providing a syringe assembly comprising; a syringe barrel having an inside surface defining a chamber containing the fluid, an open proximal end, and a distal end having an opening therethrough; an elongated plunger rod extending between a first end and a second end; a guard disposed on the first end of the plunger rod, wherein the plunger rod is in a first position in which the guard is covering the opening in the distal end of the syringe barrel; and a plunger head extending within the chamber of the syringe barrel, the second end of the plunger rod interconnected with the plunger head through a pivotable connection; pivoting the plunger rod from the first position to a second position in which the plunger rod is in general axial alignment with the syringe barrel; and depressing the plunger rod into the open proximal end of the syringe barrel to cause movement of the plunger head through the syringe barrel. - View Dependent Claims (35, 36)
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Specification