Syringe with selectable indicia of contents
First Claim
Patent Images
1. A syringe comprising:
- a barrel defining a liquid chamber, an aperture and two or more contents indicators;
a plunger movable within said barrel whereby movement of the plunger in a first direction causes the liquid chamber to fill with a fluid and movement by the plunger in a second direction causes fluid to be expelled from the liquid chamber through the aperture; and
a selecting mechanism disposed on the barrel that is actuated to select only one of the two or more contents indicators; and
further comprisinga proximal flange disposed at a proximal end of the barrel, the proximal flange having an aperture extending therethrough;
the selecting mechanism including a collar attached axially around the barrel and a proximally extending tab; and
wherein the proximally extending tab extends into the aperture of the proximal flange and engages a plunger flange, the engagement of the proximally extending tab and the plunger flange acting to retain the plunger from axial movement relative to the barrel and further wherein rotation of the selecting mechanism results in disengagement of the proximally extending tab from the aperture and the plunger flange.
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Abstract
A syringe includes a barrel defining a liquid chamber, an aperture and two or more contents indicators; a plunger movable within said barrel whereby movement of the plunger in a first direction causes the liquid chamber to fill with a fluid and movement by the plunger in a second direction causes fluid to be expelled from the liquid chamber through the aperture; and a selecting mechanism disposed on the barrel that is actuated to select only one of the contents indicators.
25 Citations
24 Claims
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1. A syringe comprising:
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a barrel defining a liquid chamber, an aperture and two or more contents indicators; a plunger movable within said barrel whereby movement of the plunger in a first direction causes the liquid chamber to fill with a fluid and movement by the plunger in a second direction causes fluid to be expelled from the liquid chamber through the aperture; and a selecting mechanism disposed on the barrel that is actuated to select only one of the two or more contents indicators; and
further comprisinga proximal flange disposed at a proximal end of the barrel, the proximal flange having an aperture extending therethrough; the selecting mechanism including a collar attached axially around the barrel and a proximally extending tab; and wherein the proximally extending tab extends into the aperture of the proximal flange and engages a plunger flange, the engagement of the proximally extending tab and the plunger flange acting to retain the plunger from axial movement relative to the barrel and further wherein rotation of the selecting mechanism results in disengagement of the proximally extending tab from the aperture and the plunger flange. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A syringe comprising:
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a barrel defining a liquid chamber, an aperture and two or more contents indicators; a plunger movable within said barrel whereby movement of the plunger in a first direction causes the liquid chamber to fill with a fluid and movement by the plunger in a second direction causes fluid to be expelled from the liquid chamber through the aperture; and a selecting mechanism disposed on the barrel that is actuated to select only one of the two or more contents indicators, wherein the plunger comprises a plunger flange, and the selecting mechanism further comprises a locking tab in locking engagement with the plunger flange, the locking tab and plunger flange engagement preventing proximal axial movement of the plunger prior to selection of one of the contents indicators by the selecting mechanism. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A syringe comprising:
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a barrel including a bore and a distal end having an aperture therethrough, the barrel having associated therewith two or more contents indicators, the barrel having further associated therewith a selecting mechanism that is actuated to select only one of the contents indicators; and a plunger movable within the barrel; and
further comprisinga sleeve coaxially overlying the barrel having a locking mechanism, the locking mechanism capable of locking an engagement structure on the selecting mechanism whereby the selecting mechanism is locked in place once a selection is made, wherein the plunger comprises a plunger flange, and the selecting mechanism further comprises a locking tab in locking engagement with the plunger flange, the locking tab and plunger flange engagement preventing axial movement of the plunger prior to identification of one of the contents indicators by the selecting mechanism. - View Dependent Claims (22, 23, 24)
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Specification