Injection device

Patent metadata

Field	Value
Publication number	US-RE50441-E
Application number	US-201217876872-A
Country	US
Kind code	E1
Filing date	Jun 7, 2012
Priority date	Jun 17, 2011
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

The invention relates to an injection device comprising a housing, a container holder arranged within said housing, the container holder being configured for accommodating a medicament container having a needle attached to one end thereof and a stopper sealingly and slidable arranged inside the medicament container at the other end thereof, a drive unit comprising a plunger rod and plunger drive means, the plunger drive means being slidable arranged in relation to the plunger rod, being rotationally locked to the plunger rod and being rotatable in relation to the housing, said drive unit further comprising a first energy accumulating member arranged in the interior of the housing of the injection device and adapted to accumulate and store energy, wherein said plunger drive means is operationally associated with said first energy accumulating member, wherein the plunger drive means is releasable such that due to an output torque from said first energy accumulating member, the plunger drive means are allowed to be rotated and the plunger rod is urged towards the proximal end of the injection device whereby an injection is performed, and a rotary injection indication mechanism configured for indicating to the user the progress of the injection, wherein the rotary injection indication mechanism comprises a signalling member and a drive mechanism for rotationally driving said signalling member, said signalling member being coupled to said drive mechanism, said drive mechanism being coupled to said plunger drive means at the distal end of said plunger drive means, said rotary injection indication mechanism being arranged such that the progress of injection is shown through at least one opening provided at least in a distal end surface of the housing.

First claim

The invention claimed is:

1. An injection device, comprising:
a housing; a container holder arranged within the housing and configured for accommodating a medicament container having a needle attached to an end of the medicament container and a stopper sealingly and slidably arranged inside the medicament container at the other end of the medicament container; a drive unit, comprising:
a plunger rod;
a plunger drive mechanism slidably arranged in relation to the plunger rod, rotationally locked to the plunger rod, and rotatable in relation to the housing;
a first energy accumulating member arranged in an interior of the housing and configured to accumulate and store energy, wherein the plunger drive mechanism is operationally associated with the first energy accumulating member; and the plunger drive mechanism is releasable such that, due to an output torque from the first energy accumulating member, the plunger drive mechanism is rotatable and the plunger rod is urged toward a proximal end of the injection device, whereby an injection is performed; and
a rotary injection indication mechanism configured for indicating a progress of the injection, wherein the rotary injection indication mechanism comprises a signaling member and an indication drive mechanism for rotationally driving the signaling member, the indication drive mechanism being coupled to the plunger drive mechanism at a distal end of the plunger drive mechanism, and the rotary injection indication mechanism being arranged such that the progress of the injection is indicated through at least one opening provided at least in a distal end surface of the housing; and the indication drive mechanism includes a planetary gear assembly, and a solar wheel of the planetary gear assembly is coupled to the plunger drive mechanism.

2. An injection device, comprising:
a housing; a container holder arranged within the housing and configured for accommodating a medicament container having a needle attached to an end of the medicament container and a stopper sealingly and slidably arranged inside the medicament container at the other end of the medicament container; a drive unit, comprising:
a plunger rod;
a plunger drive mechanism slidably arranged in relation to the plunger rod, rotationally locked to the plunger rod, and rotatable in relation to the housing;
a first energy accumulating member arranged in an interior of the housing and configured to accumulate and store energy, wherein the plunger drive mechanism is operationally associated with the first energy accumulating member; and the plunger drive mechanism is releasable such that, due to an output torque from the first energy accumulating member, the plunger drive mechanism is rotatable and the plunger rod is urged toward a proximal end of the injection device, whereby an injection is performed; and
a rotary injection indication mechanism configured for indicating a progress of the injection, wherein the rotary injection indication mechanism comprises a signaling member and an indication drive mechanism for rotationally driving the signaling member, the indication drive mechanism being coupled to the plunger drive mechanism at a distal end of the plunger drive mechanism, and the rotary injection indication mechanism being arranged such that the progress of the injection is indicated through at least one opening provided at least in a distal end surface of the housing; the signaling member comprises at least one indication element for indicating that the injection device is ready for a medicament injection, that the medicament injection is in progress, and that the medicament injection has come to an end; and the at least one indication element is provided on a surface of the signaling member that is perpendicular to a longitudinal axis of the injection device.

3. The injection device of claim 2 , wherein the at least one indication element faces toward the distal end of the injection device.

4. The injection device of claim 1 , wherein the signaling member comprises a rotatable disk.

5. The injection device of claim 1 , wherein the indication drive mechanism includes a hub coupled to the plunger drive mechanism.

6. The injection device of claim 5 , wherein the signaling member is a rotatable element.

7. The injection device of claim 5 , wherein the signaling member comprises an indication structure for indicating that the injection device is ready for a medicament injection, that the medicament injection is in progress, and that the medicament injection has come to an end.

8. An injection device, comprising:
a housing; a container holder arranged within the housing and configured for accommodating a medicament container having a needle attached to an end of the medicament container and a stopper sealingly and slidably arranged inside the medicament container at the other end of the medicament container; a drive unit, comprising:
a plunger rod;
a plunger drive mechanism slidably arranged in relation to the plunger rod, rotationally locked to the plunger rod, and rotatable in relation to the housing;
a first energy accumulating member arranged in an interior of the housing and configured to accumulate and store energy, wherein the plunger drive mechanism is operationally associated with the first energy accumulating member; and the plunger drive mechanism is releasable such that, due to an output torque from the first energy accumulating member, the plunger drive mechanism is rotatable and the plunger rod is urged toward a proximal end of the injection device, whereby an injection is performed; and
a rotary injection indication mechanism configured for indicating a progress of the injection, wherein the rotary injection indication mechanism comprises a signaling member and an indication drive mechanism for rotationally driving the signaling member, the indication drive mechanism being coupled to the plunger drive mechanism at a distal end of the plunger drive mechanism, and the rotary injection indication mechanism being arranged such that the progress of the injection is indicated through at least one opening provided at least in a distal end surface of the housing; wherein the indication drive mechanism includes a hub coupled to the plunger drive mechanism; the signaling member comprises an indication structure for indicating that the injection device is ready for a medicament injection, that the medicament injection is in progress, and that the medicament injection has come to an end; the indication structure comprises a plurality of segments separated from each other by at least one of a plurality of ribs protruding from a surface of the signaling member, indentations in the surface of the signaling member, and different colors of the segments or the surface of the signaling member.

9. The injection device of claim 5 , wherein the indication drive mechanism and the signaling member are formed as one piece.

10. The injection device of claim 1 , wherein the rotary injection indication mechanism is located distal to the first energy accumulating member or the plunger drive mechanism.

11. An injection device, comprising:
a housing; a container holder arranged within the housing and configured for accommodating a medicament container having a needle attached to an end of the medicament container and a stopper sealingly and slidably arranged inside the medicament container at the other end of the medicament container; a drive unit, comprising:
a plunger rod;
a plunger drive mechanism slidably arranged in relation to the plunger rod, rotationally locked to the plunger rod, and rotatable in relation to the housing;
a first energy accumulating member arranged in an interior

Assignees

• Shl Medical Ag

Inventors

• Karlsson Anders
• Olson Stephan

Classifications

• A61M5/32

  Needles; Details of needles pertaining to their connection with syringe or hub (infusion needles A61M5/158); Accessories for bringing the needle into, or holding the needle on, the body {(A61M5/42, A61M5/46 take precedence; guide needles for catheters A61M25/065)}; Devices for protection of needles {(apparatus specially adapted for cleaning or sterilising needles A61M5/001)} · CPC title

• A61M5/315

  Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod {or piston}; Appliances on the rod for facilitating dosing {; Dosing mechanisms} · CPC title

• A61M5/31585

  performed by axially moving actuator, e.g. an injection button · CPC title

• A61M2205/583

  by visual feedback · CPC title

• A61M5/20

  Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically (A61M5/142 {, A61M5/46} take precedence; {hypodermic projectiles F42B12/54}) · CPC title