Autoinjector with a needle cover

Patent metadata

Field	Value
Publication number	US-11559627-B2
Application number	US-201816486403-A
Country	US
Kind code	B2
Filing date	Aug 21, 2018
Priority date	Sep 4, 2017
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

The invention relates to an autoinjector 59 for administering a fluid medicament to a subject comprising: a housing 1 for receiving a cartridge holder; a driver assembly 8 ; the driver assembly on actuation may move the cartridge 3 forward in the cartridge holder 2 ; a needle cover 4 may be coupled to the housing wherein the needle cover 4 travels in a linear or translational movement; said needle cover 4 is adapted to protect a needle when the needle cover may be in first locking position 17 and second locking position 18 ; the linear or translational movement may be achieved by a cam profile 13 and a cam follower 14 ; the cam profile 13 may be provided on outside surface of housing and the cam follower 14 located between the needle cover 4 and the housing 1 ; a first biasing member 15 ; and a second biasing member 16 configured to bias the cartridge 3 and the needle cover 4 respectively; and a safety cap 11 to control the actuation of the autoinjector. The needle cover 4 further comprises a sleeve 91 or sleeve 92 which prevents or inhibits the obstruction of the movement of needle cover 4 when the user accidentally hold the needle cover 4 during actuation of the autoinjector.

First claim

We claim:

1. An autoinjector for administering a fluid medicament to a subject comprising:
(i) a housing having a proximal portion and a distal portion;
(ii) a cartridge holder received within the housing, said cartridge holder having a proximal end and a distal end;
(iii) a cartridge;
(iv) a plunger;
(v) a needle cover, wherein the housing is at least partially received within the needle cover, wherein the needle cover has an inner surface;
(vi) a needle cover locking mechanism having a first locking position and a second locking position, wherein the needle cover locking mechanism comprises a cam profile and a cam follower and wherein the cam follower of the locking mechanism is located between the needle cover and the distal portion of the housing in both the first locking position and the second locking position.

2. The autoinjector of claim 1 , wherein the proximal portion of the housing has a first sleeve section and the distal portion of the housing has a second sleeve section.

3. The autoinjector of claim 2 , wherein the second sleeve section at a distal end of the housing comprises diametrically opposite cutting arms having flank surfaces.

4. The autoinjector of claim 3 , wherein the flank surfaces of the cutting arms comprise a cam profile.

5. The autoinjector of claim 1 , wherein the cam profile comprises an angled contour surface in the proximal portion and a cylindrical contour surface in the distal portion.

6. The autoinjector of claim 5 , wherein a cam follower button of a cam follower mates with a distal portion of the angled contour surface of the cam profile in the first locking position.

7. The autoinjector of claim 6 , wherein the cam follower button of the cam follower mates with the cylindrical contour surface of the cam profile in the second locking position.

8. The autoinjector of claim 1 , wherein the cam follower comprises a cam follower protrusion on the distal portion; a cam follower button on the proximal portion; and a cam follower body extending between them.

9. The autoinjector of claim 8 , wherein the protrusion of the cam follower mates with a groove on the inner surface of the needle cover both in the first locking position and in the second locking position.

10. The autoinjector of claim 1 , wherein the distal end of the cartridge holder abuts the inner surface of needle cover in the first locking position.

11. The autoinjector of claim 1 , wherein the needle cover further comprises a sleeve.

12. The autoinjector of claim 11 , wherein the sleeve is received on an outer surface of the needle cover, wherein the sleeve prevents obstruction of movement of the needle cover from the first locking position to the second locking position when a user accidentally holds the needle cover during actuation of the autoinjector.

13. The autoinjector of claim 11 , wherein the sleeve comprises a proximal end, a distal end and a coil body extending between them.

14. An autoinjector for administering a fluid medicament to a subject comprising: (i) a housing having a proximal portion and a distal portion, said housing comprises a first sleeve section and a second sleeve section, wherein the first sleeve section having inward transverse projections on the inner surface; (ii) a cartridge holder having a proximal end and a distal end, said cartridge holder received within the housing; (iii) a cartridge; (iv) a plunger having two wings provided on the outer surface, said wings having distal surfaces, wherein the distal surfaces of the wings engage the inward transverse projections of the housing at the end of medicament administration which prevents the plunger from hitting the cartridge and no stress occurs on the cartridge; (v) a needle cover, wherein the housing is at least partially received within the needle cover, (vi) a needle cover locking mechanism having a first locking position and a second locking position, said needle cover locking mechanism comprises a cam profile and a cam follower, wherein the cam follower of the locking mechanism is located between the needle cover and the second sleeve section of the housing in both the first locking position and the second locking position, wherein the needle cover further comprising a sleeve received on an outer surface of the needle cover, wherein the sleeve prevents obstruction of movement of the needle cover from the first locking position to the second locking position when a user accidentally holds the needle cover during actuation of the autoinjector.

15. The autoinjector of claim 14 , wherein the sleeve comprises a proximal end, a distal end and a coil body extending between them.

Assignees

• Wockhardt Ltd

Inventors

• Shanmugam Loganathan
• Karajgi Jayant Shrikant
• Natarajan Suresh Kumar
• Mani Vasanthan
• Fernandez Cyril Lourdnathan Joseph

Classifications

• A61M5/20 Primary

  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

• A61M5/3202

  Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001) · CPC title

• A61M5/31581

  performed by rotationally moving or pivoting actuator operated by user, e.g. an injection lever or handle · CPC title

• A61M2005/2073

  preventing premature release, e.g. by making use of a safety lock · CPC title

• A61M5/3257

  Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means · CPC title