INJECTION DEVICE

• US 20180221588A1
• Filed: 03/30/2018
• Published: 08/09/2018
• Est. Priority Date: 09/30/2015
• Status: Active Grant

• Current Assignee: Haselmeier AG (Sulzer AG)
• Original Assignee: Haselmeier AG (Sulzer AG)
• Inventors: Keitel, Joachim
• Granted Patent: US 10,646,658 B2
• Time in Patent Office: Days
• CPC Class Codes: A61M 2005/3126 Specific display means related to dosing
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/582 by tactile feedback
• CPC Class Codes: A61M 5/20 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 Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/31535 Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
• CPC Class Codes: A61M 5/31553 without axial movement of dose setting member
• CPC Class Codes: A61M 5/3157 Means providing feedback signals when administration is completed A61M5/20 takes precedence
• CPC Class Codes: A61M 5/31583 based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod

Abstract

An injection device includes: a housing defining a longitudinal axis; an operating element; a metering member held in the housing so as to be rotatable and fixed in the direction of the axis; the operating element, in a first position for setting a quantity to be dispensed, being mounted so as to be rotatable relative to the housing and rotationally fixedly connected to the metering member via a first coupling; the operating element, in a second position for dispensing, is rotationally fixedly connected to the housing via a second coupling and is rotatable in relation to the metering member; a first latching installation acting between operating element and housing, wherein the first latching installation is effective only in the operating element'"'"'s first position; and, a second latching installation acting between operating element and metering member, wherein the second latching installation is effective only in the operating element'"'"'s second position.

Claims

1. An injection device comprising:

a housing defining a longitudinal central axis;

an operating element;

a metering member held in said housing so as to be rotatable and fixed in the direction of the longitudinal central axis;

said operating element, in a first position for setting a quantity of injection liquid to be squeezed out, being mounted so as to be rotatable in relation to said housing and being connected in a rotationally fixed manner to said metering member via a first coupling;

said operating element, in a second position for squeezing out the quantity of injection liquid to be squeezed out, is connected in a rotationally fixed manner to said housing by way of a second coupling and is rotatable in relation to said metering member;

a first latching installation configured to act between said operating element and said housing, wherein said first latching installation is effective only in the first position of said operating element when setting the quantity of injection liquid to be squeezed out; and

,

a second latching installation configured to act between said operating element and said metering member, wherein said second latching installation is effective only in the second position of the operating element when squeezing out the quantity of injection liquid to be squeezed out.

2. The injection device of claim 1, wherein said metering member, when setting a quantity of injection liquid to be squeezed out, rotates in a first rotation direction in relation to the housing, and, when squeezing out a set quantity of injection liquid, rotates in a second rotation direction counter to said first rotation direction in relation to the housing.

3. The injection device of claim 2, wherein said second latching installation permits a rotation of said metering member in relation to said operating element in said second rotation direction, and blocks a rotation of the metering member in relation to the operating element in the first rotation direction.

4. The injection device of claim 1 further comprising a spring which is tensioned when setting a quantity of injection liquid to be squeezed out and which, in the case of a released first coupling, causes injection liquid to be squeezed out.

5. The injection device of claim 1, wherein:

said operating element has at least one latching web; and

,

said at least one latching web, in the first position of the operating element, forms part of the first coupling and, in the second position of the operating element, forms part of the second latching installation.

6. The injection device of claim 1 further comprising an entrainment element connected to said metering member in a rotationally fixed manner.

7. The injection device of claim 6, wherein said second latching installation is formed on said operating element and on said entrainment element.

8. The injection device of claim 6, wherein said first coupling is formed on said operating element and on said entrainment element.

9. The injection device of claim 7, wherein said first coupling is formed on said operating element and on said entrainment element.

10. The injection device of claim 1 further comprising a metering piston connected in a rotationally fixed manner to said operating element;

and, said metering piston being connected to said metering member by way of a first threaded connection.

11. The injection device of claim 1 further comprising an injection sleeve held in a rotationally fixed manner and so as to be displaceable in the direction of the longitudinal central axis in relation to the housing;

and, said injection sleeve being connected to said metering member by way of a second threaded connection.

12. The injection device of claim 10 further comprising an injection sleeve held in a rotationally fixed manner and so as to be displaceable in the direction of the longitudinal central axis in relation to the housing;

and, said injection sleeve being connected to said metering member by way of a second threaded connection.