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US 2021/0146064 A1Published application
Syringe
AssigneeKRUI Medical AB
InventorPer KNUTSSON
Life of this patent
Estimating the term…
Abstract
A syringe (100) comprising a barrel (111) with a lumen is provided. The barrel (111) is adapted to contain a drug, the barrel (111) having a distal end wall portion (198) and a tubular wall (112) extending proximally from said distal end wall portion (198), whereby the barrel (111) extends along an axis (1000). The distal end wall portion (198) has an opening (199) extending into a syringe head (140) adapted to receive a syringe needle, said syringe head (140) having a lumen smaller in transversal cross-section than the barrel lumen; the syringe (100) further comprising: a plunger (196) extending along the axis, said plunger shaft being displaceable along the axis (1000) within said barrel (111).
Claims22
A syringe comprising:
- a barrel with a barrel lumen, the barrel being adapted to contain a drug, the barrel having a distal end wall portion and a tubular wall extending proximally from the distal end wall portion, the barrel extending along an axis;
- wherein the distal end wall portion has an opening extending into a syringe head adapted to receive a syringe needle, the syringe head having a syringe head lumen smaller in transversal cross-section than the barrel lumen;
- a plunger extending along the axis, the plunger being displaceable along the axis within the barrel;
- wherein the plunger includes a plunger top, the plunger top being adapted to be in fluid-tight engagement with the tubular wall of the barrel;
- wherein the plunger top includes a protrusion that is adapted to fit in the syringe head lumen;
- wherein the protrusion has an elongated recess extending along the axis, and a retaining portion that is wider in transversal cross-section than the remainder of the protrusion;
- wherein the protrusion is adapted to be retained inside the syringe head lumen upon insertion by a proximally facing interaction surface;
- wherein the syringe head includes a retaining wall having a distally facing interaction surface, and the plunger is adapted to be prevented from being pulled in a direction away from the distal end wall portion by the proximally facing interaction surface of the retaining portion locking against the distally facing interaction surface of the retaining wall;
- wherein the retaining wall forms a section of the syringe lumen that is smaller in transversal cross-section than a remainder of the syringe;
- and
- wherein the proximally facing and the distally facing interaction surfaces are arranged to engage with each other when the plunger top is at a distance (D2) from the distal end wall portion.
8 more elements
A syringe comprising:
- a barrel with a barrel lumen, the barrel being adapted to contain a drug, the barrel having a distal end wall portion and a tubular wall extending proximally from the distal end wall portion, the barrel extending along an axis;
- wherein the distal end wall portion has an opening extending into a syringe head adapted to receive a syringe needle, the syringe head having a syringe head lumen smaller in transversal cross-section than the barrel lumen;
- a plunger extending along the axis, the plunger being displaceable along the axis within the barrel;
- wherein the plunger including a plunger top, the plunger top being adapted to be in fluid-tight engagement with the tubular wall of the barrel;
- wherein the plunger top includes a protrusion that is adapted to fit in the syringe head lumen;
- wherein the protrusion has an elongated recess extending along the axis, and a retaining portion that is wider in transversal cross-section than the remainder of the protrusion;
- wherein the protrusion is adapted to be retained inside the syringe head lumen upon insertion by a proximally facing interaction surface;
- wherein the syringe head includes a retaining wall having a distally facing interaction surface, and the plunger is adapted to be prevented from being pulled in a direction away from the distal end wall portion by the proximally facing interaction surface of the retaining portion locking against the distally facing interaction surface of the retaining wall;
- and
- wherein at least one of the proximally facing and the distally facing interaction surfaces has a surface roughness arithmetic average (Ra) between 1.1-9 μm.
7 more elements
A syringe comprising:
- a barrel with a barrel lumen, the barrel being adapted to contain a drug, the barrel having a distal end wall portion and a tubular wall extending proximally from the distal end wall portion, the barrel extending along an axis;
- wherein the distal end wall portion has an opening extending into a syringe head adapted to receive a syringe needle, the syringe head having a syringe head lumen smaller in transversal cross-section than the barrel lumen;
- plunger extending along the axis, the plunger being displaceable along the axis within the barrel;
- wherein the plunger includes a plunger top, the plunger top being adapted to be in fluid-tight engagement with the tubular wall of the barrel;
- wherein the plunger top includes a protrusion that is adapted to fit in the syringe head lumen;
- wherein the protrusion has an elongated recess extending along the axis, and a retaining portion that is wider in transversal cross-section than the remainder of the protrusion;
- wherein the protrusion is adapted to be retained inside the syringe head lumen upon insertion by a proximally facing interaction surface;
- wherein the syringe head includes a retaining wall having a distally facing interaction surface, and the plunger is adapted to be prevented from being pulled in a direction away from the distal end wall portion by the proximally facing interaction surface of the retaining portion locking against the distally facing interaction surface of the retaining wall;
- and
- wherein the elongated recess of the protrusion has rounded edges.
7 more elements
-18. (canceled)
-37. (canceled)
Dependencies are inferred from the claim text.