Back to results
US 2004/0111065 A1Published application
Disposable syringe
OwnerMing-Jeng Shue, Phillip Shueinventors
Life of this patent
Estimating the term…
Abstract
A disposable syringe includes an encasing member which is sleevable on a syringe body from a needle hub of the syringe body. A needle cannula is secured to the needle hub and projects outwardly of a surrounding front segment of the encasing member in a position of use. A plunger is slidably disposed in a barrel wall of the syringe body in a longitudinal direction. The syringe body is movable relative to the encasing member in the longitudinal direction between the position of use, where the needle hub is disposed in the surrounding front segment, and a disposal position, where the needle cannula is disposed inwardly of the surrounding front segment as a result of withdrawal of the needle hub from the surrounding front segment.
Claims12
A disposable syringe comprising:
- a syringe body including
- a surrounding barrel wall which has an axis, front and rear surrounding ends opposite to each other in a longitudinal direction parallel to the axis, an outer surrounding wall surface, and an inner surrounding wall surface opposite to said outer surrounding wall surface, said inner surrounding wall surface confining an accommodation chamber,
- a front end wall which extends from said front surrounding end radially and towards the axis to confine an internal port in fluid communication with said accommodation chamber,
- a needle cannula disposed to extend in the longitudinal direction, and
- a needle hub disposed to secure said needle cannula to said front end wall such that said needle cannula is in fluid communication with said accommodation chamber through said internal port in the longitudinal direction;
- a plunger including a head portion disposed to be movable in said accommodation chamber and in slidable contact with said inner surrounding wall surface, and a stem portion extending from said head portion in the longitudinal direction and outwardly of said rear surrounding end so as to be manually operated;
- an encasing member which is configured to be sleevable on said syringe body from said needle hub, and which includes
- a surrounding front segment that surrounds said needle hub, and that permits said needle cannula to extend outwardly thereof and to be retractable relative thereto, and
- a surrounding rear segment extending from said surrounding front segment in the longitudinal direction, to be sleeved on said surrounding barrel wall, and having an inner tubular wall surface, said inner tubular wall surface confronting and being movable relative to said outer surrounding wall surface between a position of use, where said front end wall is closer to said surrounding front segment, and where said needle cannula extends outwardly of said surrounding front segment, and a disposal position, where said front end wall is remote from said surrounding front segment, and where said needle cannula is disposed inwardly of said surrounding front segment as a result of withdrawal of said needle hub from said surrounding front segment;
- and
- a retaining member disposed between said inner tubular wall surface and said outer surrounding wall surface to arrest unforced movement of said surrounding barrel wall in the position of use.
8 more elements
An intravenous catheter inserting device, comprising:
- a syringe body including
- a surrounding barrel wall which has an axis, front and rear surrounding ends opposite to each other in a longitudinal direction parallel to the axis, an outer surrounding wall surface, and an inner surrounding wall surface opposite to said outer surrounding wall surface, said inner surrounding wall surface confining an accommodation chamber,
- a front end wall which extends from said front surrounding end radially and towards the axis to confine an internal port in fluid communication with said accommodation chamber,
- a needle cannula including a secured end and a cannula body which extends from said secured end in the longitudinal direction, and
- a needle hub disposed to secure said secured end of said needle cannula to said front end wall such that said needle cannula is in fluid communication with said accommodation chamber through said internal port in the longitudinal direction;
- a plunger including a head portion disposed to be movable in said accommodation chamber and in slidable contact with said inner surrounding wall surface, and a stem portion extending from said head portion in the longitudinal direction and outwardly of said rear surrounding end so as to be manually operated;
- an encasing member which is configured to be sleevable on said syringe body from said needle hub, and which includes
- a surrounding front segment that surrounds said needle hub, and that permits said needle cannula to extend outwardly thereof and to be retractable relative thereto, and
- a surrounding rear segment extending from said surrounding front segment in the longitudinal direction, to be sleeved on said surrounding barrel wall, and having an inner tubular wall surface, said inner tubular wall surface confronting and being movable relative to said outer surrounding wall surface between a position of use, where said front end wall is closer to said surrounding front segment, and where said needle cannula extends outwardly of said surrounding front segment, and a disposal position, where said front end wall is remote from said surrounding front segment, and where said needle cannula is disposed inwardly of said surrounding front segment as a result of withdrawal of said needle hub from said surrounding front segment;
- a retaining member disposed between said inner tubular wall surface and said outer surrounding wall surface to arrest unforced movement of said surrounding barrel wall in the position of use;
- a catheter hub including a surrounding hub wall which confines a duct that extends along the axis, and which has a sleeve portion that is sleeved on said surrounding front segment, and a tip portion opposite to said sleeve portion along the axis;
- and
- a tubular catheter including a proximate segment which is disposed in said tip portion and which extends along the axis to communicate fluidly with said duct, and a distal segment which extends from said proximate segment along the axis to project outwardly of said tip portion,
- said cannula body of said needle cannula extending along and in said tubular catheter to terminate at a tip end that projects outwardly of said distal segment of said tubular catheter.
11 more elements
Dependencies are inferred from the claim text.