Self-injection device

Patent metadata

Field	Value
Publication number	US-9717850-B2
Application number	US-200913516142-A
Country	US
Kind code	B2
Filing date	Dec 16, 2009
Priority date	Dec 16, 2009
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A device ( 100 ) for delivering a medicament into a patient's body by injection into or through the patient's skin, including: a main body having a bottom enclosure ( 104 ) that has a top surface including a button guide latch ( 268 ); a reservoir ( 160 ) disposed within the main body for containing the medicament; an injection needle ( 152 ) for penetrating the skin of the patient, the needle ( 152 ) having a lumen and communicating with the reservoir ( 160 ) when the device ( 100 ) is activated; a pressurizing system ( 140, 144 ) for pressurizing the reservoir ( 160 ) when the device ( 100 ) is activated; and an activator button ( 128 ) movably disposed on the main body and movable from a pre-activated position to an activated position. The activator button ( 128 ) includes an activation arm ( 228 ). When the activator button ( 128 ) moves from the pre-activated position to the activated position, an end of the activation arm ( 228 ) engages with the button guide latch ( 268 ) and prevents return movement of the activator button ( 128 ).

First claim

The invention claimed is:

1. A device, comprising:
a body including a top enclosure and a bottom enclosure not movable with respect to the top enclosure, the bottom enclosure having a surface including a button guide latch;
a reservoir disposed within the body for containing a medicament;
a needle for penetrating the skin of the patient, the needle having a lumen and communicating with the reservoir when the device is activated;
a pressurizing system for pressurizing the reservoir when the device is activated; and
an activator button rotatably disposed on the body and movable from a pre-activated position to an activated position, the activator button including an activation arm;
wherein when the activator button is moved from the pre-activated position to the activated position, an end of the activation arm engages with the button guide latch and prevents movement of the activator button from the activated position to the pre-activated position.

2. The device according to claim 1 , wherein:
the button guide latch comprises a guide surface and a retaining surface;
the activation arm includes a cutout and a locking portion; and
when the activator button is moved from the pre-activated position to the activated position, the cutout permits the activation arm to pass over an end of the guide surface and the locking portion of the activation arm to engage the retaining surface of the button guide latch.

3. The device according to claim 2 , wherein:
the locking portion of the activation arm comprises a bearing surface and a locking surface; and
when the activator button is moved from the pre-activated position to the activated position, the bearing surface directly contacts and slides along the guide surface until the activation arm passes over the end of the guide surface and the locking surface of the activation arm engages the retaining surface of the button guide latch.

4. The device according to claim 2 , wherein:
when the activator button is moved from the pre-activated position to the activated position, the contact between the bearing surface and the guide surface elastically deforms at least one of the bearing surface and the guide surface; and
the at least one deformed surface returns to a substantially un-deformed state when the activation arm passes over the end of the guide surface.

5. The device according to claim 2 , wherein:
the locking portion is disposed at an end of the activation arm; and
the cutout extends at least a portion of a distance from the locking portion to a base of the activation arm.

6. The device according to claim 5 , wherein the cutout extends from the locking portion to the base of the activation arm.

7. The device according to claim 2 , wherein the guide surface and the retaining surface adjoin at an end of the button guide latch forming an acute angle therebetween with respect to the button guide latch.

8. The device according to claim 7 , wherein the locking portion of the activation arm comprises a bearing surface adjoining a locking surface, the locking surface being disposed at a rear edge of the locking portion.

9. The device according to claim 1 , wherein a side of the main body prevents substantial forward motion of the activator button past the activated position.

10. The device according to claim 1 , wherein:
the button guide latch comprises a retaining post; and
the end of the activation arm comprises a cantilevered tab extending from the activation arm.

11. The device according to claim 10 , wherein:
the retaining post comprises a guide surface and a retaining surface disposed adjacent to the guide surface at an end of the guide surface;
the tab comprises a bearing surface and a locking surface disposed adjacent to a cantilevered end of the bearing surface; and
when the activator button is moved from the pre-activated position to the activated position, the bearing surface directly contacts and slides along the guide surface until the cantilevered end of the bearing surface passes the end of the guide surface and the locking surface of the tab engages the retaining surface of the retaining post.

12. The device according to claim 11 , wherein:
when the activator button is moved from the pre-activated position to the activated position, the contact between the bearing surface and the guide surface deforms at least one of the bearing surface, the guide surface, and the activation arm; and
the at least one deformed surface returns to a substantially un-deformed state when the cantilevered end of the bearing surface passes the end of the guide surface.

13. The device according to claim 10 , wherein the tab forms an acute angle with a main portion of the activation arm.

14. The device according to claim 10 , wherein the retaining post extends substantially perpendicular from the surface of the bottom enclosure.

15. A device, comprising:
a body including a top enclosure and a bottom enclosure, the bottom enclosure having a surface including a button guide latch;
a reservoir disposed within the body for containing a medicament;
a needle for penetrating the skin of the patient, the needle having a lumen and communicating with the reservoir when the device is activated;
a pressurizing system for pressurizing the reservoir when the device is activated;
an activator button movably disposed on the body and movable from a pre-activated position to an activated position, the activator button including an activation arm;
a channel fluidly connected to the needle;
a valve disposed between the reservoir and the channel to selectively permit delivery of the medicament from the reservoir to the channel;
a drive spring movable from a pre-activated position to an activated position; and
a rotor movable between a pre-activated position and an activated position, the rotor supporting the drive spring in the respective pre-activated positions of the rotor and the drive spring;
wherein when the activator button is moved from the pre-activated position to the activated position, an end of the activation arm engages with the button guide latch and prevents movement of the activator button from the activated position to the pre-activated position
wherein the bottom enclosure includes a bottom surface for contacting the skin of the patient and the surface of the bottom enclosure includes a substantially cylindrical housing about which the rotor is rotatably disposed, the pressurizing system being disposed within the cylindrical housing; and
when the activator button is moved from the pre-activated position to the activated position, the activation arm moves the rotor to the activated position, thereby releasing the pressurizing system to pressurize the reservoir and releasing the drive spring to move to the activated position to drive the needle to penetrate the skin of the patient, and the activator button opens the valve to permit delivery of the medicament from the reservoir to the needle via the channel.

16. The device according to claim 15 , wherein the rotor prevents substantial forward motion of the activator button past the activated position.

17. A device, comprising:
a body including a top enclosure and a bottom enclosure not movable relative to the top enclosure, the bottom enclosure having a surface including a button guide latch having a guide surface and a retaining surface;
a reservoir disposed within the body forming a chamber for containing a medicament;
a needle for penetrating the skin of the patient, the needle having a lumen and communicating with the reservoir when the device is activated;

Assignees

• Sonderegger Ralph
• Becton Dickinson Co

Inventors

• Sonderegger Ralph

Classifications

• A61M5/2033 Primary

  Spring-loaded one-shot injectors with or without automatic needle insertion (multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287) · CPC title

• A61M2205/15

  Detection of leaks · CPC title

• A61M2037/0023

  Drug applicators using microneedles · CPC title

• A61M37/0015

  by using microneedles · CPC title

• A61M5/3157

  Means providing feedback signals when administration is completed (A61M5/20 takes precedence) · CPC title