Injection device

Patent metadata

Field	Value
Publication number	US-9844629-B2
Application number	US-201114117838-A
Country	US
Kind code	B2
Filing date	May 18, 2011
Priority date	May 18, 2011
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

An injection device ( 100 ), including a base ( 104 ), a sliding body ( 116 ) slidably connected to the base ( 104 ), a double-ended needle ( 120 ) fixed to the sliding body ( 116 ), a biasing member ( 124 ) for proximally biasing the sliding body ( 116 ) with respect to the base ( 104 ), and for retracting the needle ( 120 ) into the device ( 100 ) subsequent to activation of the device ( 100 ), a medicament cartridge ( 128 ) for holding a medicament, slidably connected to the sliding body ( 116 ), and a stopper ( 132 ) slidably disposed within the medicament cartridge ( 128 ). The base ( 104 ) has a proximal end ( 108 ) and a surface ( 164 ) disposed at a distal end ( 112 ) thereof for contacting a patient's skin. The base ( 104 ) also has a first locking mechanism. The sliding body, ( 116 ) has a locking feature and a second locking mechanism. The second locking mechanism locks the medicament cartridge ( 128 ) relative to the sliding body ( 116 ) upon completion of displacement of the medicament cartridge ( 128 ) relative to the sliding body ( 116 ). The first locking mechanism and the locking feature interact to lock the sliding member ( 116 ) relative to the base subsequent to retraction of the needle ( 120 ) into the device ( 100 ).

First claim

The invention claimed is:

1. An injection device, comprising:
a base having a proximal end and a surface disposed at a distal end thereof for contacting a patient's skin, the base comprising a first locking mechanism;
a sliding body slidably connected to the base, the sliding body comprising a locking feature and a second locking mechanism;
a double-ended needle fixed to the sliding body;
a biasing member for proximally biasing the sliding body with respect to the base, and for retracting the needle into the device subsequent to activation of the device;
a rigid medicament cartridge for holding a medicament, slidably connected to the sliding body, wherein the second locking mechanism locks the medicament cartridge relative to the sliding body upon completion of displacement of the medicament cartridge relative to the sliding body; and
a stopper slidably disposed within the medicament cartridge;
wherein the first locking mechanism and the locking feature interact to lock the sliding member relative to the base subsequent to retraction of the needle into the device.

2. The device according to claim 1 , wherein the medicament cartridge is connectable to the sliding body.

3. The device according to claim 1 , wherein the stopper is pierceable by the needle to establish communication with the medicament.

4. An injection device, comprising:
a base having a proximal end and a surface disposed at a distal end thereof for contacting a patient's skin, the base comprising a first locking mechanism;
a sliding body slidably connected to the base, the sliding body comprising a locking feature and a second locking mechanism;
a double-ended needle fixed to the sliding body;
a biasing member for proximally biasing the sliding body with respect to the base, and for retracting the needle into the device subsequent to activation of the device;
a medicament cartridge for holding a medicament, slidably connected to the sliding body, wherein the second locking mechanism locks the medicament cartridge relative to the sliding body upon completion of displacement of the medicament cartridge relative to the sliding body; and
a stopper slidably disposed within the medicament cartridge;
wherein the first locking mechanism and the locking feature interact to lock the sliding member relative to the base subsequent to retraction of the needle into the device; and
wherein the sliding body is moveable from a first position in which the needle is disposed entirely within the device, to a second position in which a portion of the needle extends outside of the device, and to a third position in which the needle is retracted entirely within the device, wherein the third position is distally displaced relative to the first position.

5. An injection device, comprising:
a base having a proximal end and a surface disposed at a distal end thereof for contacting a patient's skin, the base comprising a first locking mechanism;
a sliding body slidably connected to the base, the sliding body comprising a locking feature and a second locking mechanism;
a double-ended needle fixed to the sliding body;
a biasing member for proximally biasing the sliding body with respect to the base, and for retracting the needle into the device subsequent to activation of the device;
a medicament cartridge for holding a medicament, slidably connected to the sliding body, wherein the second locking mechanism locks the medicament cartridge relative to the sliding body upon completion of displacement of the medicament cartridge relative to the sliding body; and
a stopper slidably disposed within the medicament cartridge;
wherein the first locking mechanism and the locking feature interact to lock the sliding member relative to the base subsequent to retraction of the needle into the device; and
wherein the first locking mechanism comprises:
a plurality of angled lips disposed circumferentially about an interior of the base, the angled lips projecting radially inward and being angled distally, each angled lip having a proximal angled surface and a distal angled surface; and
a plurality of axial ribs circumferentially disposed about the interior of the base, the ribs being distally separated from the angled lips to define a locking space therebetween.

6. The device according to claim 5 , wherein the plurality of axial ribs comprises a pair of axial ribs corresponding to each angled lip, each pair of axial ribs being circumferentially disposed on opposing sides of the corresponding angled lip.

7. The device according to claim 5 , wherein the locking feature of the sliding body comprises a plurality of circumferentially disposed, distally depending, cantilevered legs, each leg having a pair of feet circumferentially protruding from a distal end thereof.

8. The device according to claim 7 , wherein respective proximal surfaces of the feet are angled to correspond to the angle of the respective distal angled surfaces of the angled lips.

9. The device according to claim 7 , wherein as the sliding body moves from a first position in which the needle is disposed entirely within the device to a second position in which a portion of the needle extends outside of the device, the feet engage the proximal angled surface of the angled lip, inwardly radially deflecting the legs and biasing the legs radially outward, and once the feet move distally past the angled lip, the feet move radially outward to engage and slide along the axial ribs.

10. The device according to claim 9 , wherein as the sliding body moves from the second position to a third position in which the needle is retracted entirely within the device, the feet slide along the axial ribs until reaching proximal ends thereof and then move radially outward into the locking space.

11. An injection device, comprising:
a base having a proximal end and a surface disposed at a distal end thereof for contacting a patient's skin, the base comprising a first locking mechanism;
a sliding body slidably connected to the base, the sliding body comprising a locking feature and a second locking mechanism;
a double-ended needle fixed to the sliding body;
a biasing member for proximally biasing the sliding body with respect to the base, and for retracting the needle into the device subsequent to activation of the device;
a medicament cartridge for holding a medicament, slidably connected to the sliding body, wherein the second locking mechanism locks the medicament cartridge relative to the sliding body upon completion of displacement of the medicament cartridge relative to the sliding body; and
a stopper slidably disposed within the medicament cartridge;
wherein:
the first locking mechanism and the locking feature interact to lock the sliding member relative to the base subsequent to retraction of the needle into the device;
the medicament cartridge comprises a cartridge lip protruding radially outward from a distal end thereof; and
the second locking mechanism of the sliding body comprises a locking rib protruding radially inward, the locking rib being disposed adjacent a distal end of a cartridge channel of the sliding body in which the medicament cartridge travels; and
upon completion of displacement of the medicament cartridge relative to the sliding body, the cartridge lip distally passes the locking rib and the locking rib locks the medicament cartridge relative to the sliding body.

12. The device according to claim 11 , wherein the cartridge channel comprises:
a connecting rib protruding radially inward; and
a holding rib protruding radially inward and being distally disposed relative to the connecting rib;
wherein the cartridge lip distally passes the connecting

Assignees

• Cronenberg Richard
• Becton Dickinson Co

Inventors

• Cronenberg Richard

Classifications

• A61M2005/3267

  Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body · CPC title

• A61M5/2429

  by telescoping of ampoules or carpules with the syringe body · CPC title

• 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

• A61M5/50 Primary

  having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile {(retractable needles or needle protectors with means for preventing re-use A61M5/321)} · CPC title

• A61M5/326

  Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user · CPC title