Adjustable dose setting plunger for syringe
First Claim
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1. A syringe, comprising:
- a body for receiving a medicament;
a plunger comprising a first portion rotatably movable with respect to said body to selectively set a dose of said medicament and a second portion axially movable in a first direction with respect to said body to selectively draw said medicament into said body according to said dose;
a thread disposed on a surface of said first portion of said plunger and in rotational engagement with at least a first portion of said body, said thread axially deflecting with respect to said first portion of said body when said plunger is pushed axially with respect to said body in a second direction to dispense said medicament from said body;
a plurality of numerical indicators helically arranged along an outer circumferential surface of said plunger; and
a flange assembly including first and second flange members, whereinsaid first and second flange members are symmetrical, said first and second flange members each include a cutout, and the two cutouts loin together to form a window that displays at least one of said plurality of numerical indicators.
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Abstract
A syringe includes a body for receiving a medicament and a plunger movably connected to the syringe body. The plunger is moved with respect to the syringe body to draw in and dispense the medicament. A plurality of dose setting indicators are disposed on the plunger. The plunger is rotated outwardly from the syringe body to draw medicament into the syringe body. The plunger can be pushed or rotated into the syringe body to dispense the medicament.
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Citations
17 Claims
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1. A syringe, comprising:
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a body for receiving a medicament; a plunger comprising a first portion rotatably movable with respect to said body to selectively set a dose of said medicament and a second portion axially movable in a first direction with respect to said body to selectively draw said medicament into said body according to said dose; a thread disposed on a surface of said first portion of said plunger and in rotational engagement with at least a first portion of said body, said thread axially deflecting with respect to said first portion of said body when said plunger is pushed axially with respect to said body in a second direction to dispense said medicament from said body; a plurality of numerical indicators helically arranged along an outer circumferential surface of said plunger; and a flange assembly including first and second flange members, wherein said first and second flange members are symmetrical, said first and second flange members each include a cutout, and the two cutouts loin together to form a window that displays at least one of said plurality of numerical indicators. - 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 body for receiving a medicament; a flange assembly including a flange, a wall extending from said flange into said body, a bore extending through said flange assembly and first and second flange members, said first and second flange members are symmetrical; and a plunger rotatably movable with respect to said bore of said flange assembly to selectively set a dose of said medicament and axially movable with respect to said body to selectively draw in or dispense said medicament according to said dose, wherein; said bore of said flange assembly and said plunger have corresponding threaded portions to facilitate rotating said plunger with respect to said flange assembly to draw said dose of said medicament into said body; said threaded portion of said plunger axially deflects with respect to said threaded portion of said bore of said flange assembly when said plunger is pushed axially through said flange assembly to dispense said medicament from said body; and a plurality of numerical indicators is helically arranged along an outer circumferential surface of said threaded portion of said plunger, wherein said first and second flange members each include a cutout, and the two cutouts loin together to form a window that displays at least one of said plurality of numerical indicators. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification