Needle assembly for drug pump

• US 8,915,882 B2
• Filed: 01/19/2011
• Issued: 12/23/2014
• Est. Priority Date: 01/19/2010
• Status: Active Grant

• Current Assignee: West Pharma. Services IL, Ltd. (West Pharmaceutical Services Incorporated)
• Original Assignee: Medimop Medical Projects Ltd. (West Pharmaceutical Services Incorporated)
• Inventors: Cabiri, Oz
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): LANDRY II, GERALD ERNEST
• Application Number:
  US13/521,167
• Publication Number:
  US 20130296785A1
• Time in Patent Office: 1,434 Days
• Field of Search: 604 63- 67, 604/134, 604/136, 604/157
• US Class Current: 604/162
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 2005/206 With automatic needle insertion
• CPC Class Codes: A61M 2005/2073 preventing premature release, e.g. by making use of a safety lock
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/1626 Needle protectors therefor in combination with syringes A61M5/3202; protectors for sharps A61B50/3001
• 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 5/3204 Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices
• CPC Class Codes: A61M 5/322 Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston devices for protecting guide needles in combination with catheters A61M25/0612
• CPC Class Codes: A61M 5/3287 Accessories for bringing the needle into the body; Automatic needle insertion A61M5/20, A61M5/31525 take precedence

Abstract

A needle assembly adapted for fluid communication with a cartridge containing a substance to be delivered to a subject, the needle assembly characterized by a biasing device (70) arranged to apply a biasing force on a needle (28, 116) to cause the needle (28, 116) to protrude outwards of a housing (30, 112) to pierce the subject, and biasing device release apparatus (60) including a biasing device arrestor (62) that initially blocks movement of the biasing device (70) and which releases the biasing device (70) when the safety latch (32, 122) moves to a position that permits moving the needle holder (26, 118) to cause the needle (28, 116) to protrude outwards of the housing (30, 112).

Claims

1. An apparatus (110) comprising:

an activation mechanism (20) operative to deploy a needle (116) to protrude out of a housing (112); and

a safety latch (122) movably mounted on said housing (112) and formed with a needle opening (129) to allow said needle (116) to pass therethrough, wherein said safety latch (122) has a first position wherein said needle (116) is aligned to pass through said needle opening (129) and a second position wherein said safety latch (122) is moved with respect to said housing (112), such that said needle (116) is misaligned with said needle opening (129) and is blocked by a portion of said safety latch (122) distanced from said needle opening (129).

2. The apparatus (110) according to claim 1, wherein said safety latch (122) is pivotally mounted on said housing (112) about a pivot (124) and in the second position said safety latch (122) is pivoted away from said housing (112).

3. The apparatus (110) according to claim 1, wherein said safety latch (122) is pivotally mounted on said housing (112) about a pivot (124) and in the first position said safety latch (122) is flush with said housing (112).

4. The apparatus (110) according to claim 1, further comprising a microsensor (120) that senses a position of said needle (116).

5. The apparatus (110) according to claim 1, further comprising a sensor (130) that senses a position of said safety latch (122).

6. The apparatus (110) according to claim 1, wherein said safety latch (122) is biased by a biasing device (128).

7. A pump (110) for administering a fluid to a subject comprising;

a housing (112);

a needle holder (118) including a needle (116) having a distal end, the needle holder (118) being movable within the housing (118) from a first position in which the needle (116) is located entirely within the housing (112) and a second position in which at least the distal end of the needle (116) extends outside of the housing (112) for engaging the skin of the subject and administering the fluid to the subject;

a safety latch (122) including a needle opening (129) extending therethrough, the safety latch (122) being movable from a first position in which the safety latch (122) is flush with a surface of the housing (112) with the needle opening (129) aligned with the distal end of the needle (116) so that when the needle holder (118) is moved to the second position the needle (116) extends through the needle opening (129), out of the housing (112) and into engagement with the skin of the subject and a second position in which at least a portion of the safety latch (122) is separated from the housing surface, the needle opening (129) is not aligned with the distal end of the needle (116) and a portion of the safety latch (122) engages and blocks access to the distal end of the needle (116).

8. The pump (110) according to claim 7, wherein the safety latch (122) is pivotally mounted on the housing (112) about a pivot (124) and in the second position the portion of the safety latch (122) is pivoted away from said housing (112).

9. The pump (110) according to claim 7, further comprising a sensor (120) that senses the position of the needle holder (118).

10. The pump (110) according to claim 7 further comprising a sensor (130) that senses a position of the safety latch (122).

11. The pump (110) according to claim 7 wherein said safety latch (122) is biased by a biasing device (128).