Cover for housing a syringe, assembly comprising such cover, pen-injector comprising such assembly and method for forming a pen-injector

• US 9,801,995 B2
• Filed: 03/14/2012
• Issued: 10/31/2017
• Est. Priority Date: 03/22/2011
• Status: Active Grant

• Current Assignee: Pfizer Health AB (Pfizer Inc.)
• Original Assignee: Pfizer Health AB (Pfizer Inc.)
• Inventors: DeRosa, Francesco, Lindwall, Torbjorn, Sahlin, Anna, Skedelius, Rolf
• Primary Examiner(s): Sirmons, Kevin C
• Assistant Examiner(s): Hall, Deanna K
• Application Number:
  US14/000,987
• Publication Number:
  US 20140378909A1
• Time in Patent Office: 2,057 Days
• CPC Class Codes: A61M 2005/3139 Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips
• CPC Class Codes: A61M 2207/00 Methods of manufacture, assembly or production
• CPC Class Codes: A61M 5/002 Packages specially adapted therefor, e.g. for syringes or needles, kits for diabetics needle protection, e.g. caps, A61M5/3202; for sharps A61B50/3001
• CPC Class Codes: A61M 5/284 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/3137 Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
• CPC Class Codes: A61M 5/31511 Piston or piston-rod constructions, e.g. connection of piston with piston-rod A61M5/5066 takes precedence
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

The invention relates to a cover for housing a syringe, an assembly comprising such cover, a pen-injector comprising such assembly and a method for forming a pen-injector.

Claims

1. Cover (25) for housing a syringe (1) and thereby forming a pen-injector, said syringe (1) comprising a body (2) extending along an axis (A) between proximal (2a) and distal (2b) ends and adapted to contain a product to be injected, a finger grip (4) protruding outwardly from the body (2), a piston rod (10) coaxially mounted in the body (2) so as to slide along the axis (A) of the body (2), and a needle mounted on the distal end (2b) of the body (2),

said cover (25) consisting of:

a shell (30) extending along a longitudinal axis (B) between proximal (30a) and distal (30b) ends, said shell (30) being adapted to accommodate the body (2), the finger grip (4) and the piston rod (10) of the syringe (1) so that at least a part of the needle of the syringe (1) extends through the distal end (30b) of the shell (30),

an actuator (26) moveably mounted on the shell (30) and arranged to actuate the piston rod (10) of the syringe (1) when the syringe (1) is placed in the shell (30),

said cover (25) being characterised in that the shell (30) is provided with a holding member (48) adapted to hold the finger grip (4) of the syringe (1), and

in that the shell (30) comprises a base (40) and a lid (55), said base (40) including a cavity (45) extending along the longitudinal axis (B) of the shell (30) and adapted to receive the syringe (1) with the axis (A) of the body (2) parallel to the longitudinal axis (B) of the shell (30), said lid (55) being movable with respect to the base (40) between an opened position in which the shell (30) presents a lateral access to the cavity (45) to allow insertion or removal of the syringe (1), and a closed position, and

in that the actuator (26) is movably mounted on the shell (30) between an extended position, wherein it protrudes from the shell, and a depressed position.

2. Cover (25) according to claim 1, wherein the lid (55) is pivotally mounted on the base (40) about a pivot axis (D) between the opened position in which said lid (55) is angularly spaced from the base (40), and the closed position in which said lid (55) covers the cavity (45).

3. Cover (25) according to claim 2, wherein the lid (55) is mounted on the base (40) at the distal end (30b) of the shell (30) and the pivot axis (D) extends transversally with respect to the longitudinal axis (B) of the shell (30).

4. Cover (25) according to claim 1, wherein the holding member comprises two slots (48) opened transversally with respect to the longitudinal axis (B) of the shell (30) and extending on either sides of the cavity (45), said slots (48) being designed to accommodate two opposite portions (5) of the finger grip (4) projecting transversally from the body (2).

5. Cover (25) according to claim 1, wherein the base (40) has a hoop (51) at the proximal end (30a) of the shell (30), said hoop (51) being arranged coaxially to the longitudinal axis (B) of the shell (30) and delimiting an opening in which the actuator (26) is mounted so as to slide along the longitudinal axis (B) of the shell (30).

6. Cover (25) according to claim 5, wherein the actuator (26) has an outer surface (26a) and the base (40) comprises a friction member (49) resiliently biased against the outer surface (26a) of the actuator (26).

7. Cover (25) according to claim 1, wherein the shell (30) has two opposite outer surfaces (32, 34) which are substantially flat.