DISPENSER FOR LOCAL ANAESTHETICS AND OTHER LIQUIDS

• US 20110009822A1
• Filed: 02/20/2009
• Published: 01/13/2011
• Est. Priority Date: 02/21/2008
• Status: Abandoned Application

• Current Assignee: Poul Torben Nielsen
• Original Assignee: Poul Torben Nielsen
• Inventors: Nielsen, Poul Torben
• Application Number:
  US12/735,849
• Publication Number:
  US 20110009822A1
• Time in Patent Office: Days
• US Class Current: 604/151
• CPC Class Codes: A61J 1/201 having one piercing end
• CPC Class Codes: A61J 1/2096 Combination of a vial and a syringe for transferring or mixing their contents
• CPC Class Codes: A61M 5/204 connected to external reservoirs for multiple refilling
• CPC Class Codes: A61M 5/3145 Filters incorporated in syringes
• CPC Class Codes: A61M 5/31525 Dosing burettes, pipettes B01L3/02
• CPC Class Codes: A61M 5/31581 performed by rotationally moving or pivoting actuator operated by user, e.g. an injection lever or handle

Abstract

A device for transferring liquid, e.g. local anesthetics, from a reservoir (1) to a hypodermic needle (18) for introduction into tissue. The device comprises a pump chamber (11) in a pump housing (19), which is provided with a manually displaceable pump piston (12), which is pivotably connected to a pump grip (13). The pump housing (19) is fluidly connected to the reservoir (1) through a piercing cannula (3) at an inlet (9), and fluidly connected to the needle (18) at an outlet (20).

Claims

1. A device for transferring liquid, including local anaesthetics from a reservoir to a hypodermic needle or catheter, characterised in that it includes a well-defined pump chamber (11) in a pump housing (19) which is provided with a manually displaceable pump piston (12) which at one end outside the pump housing (19) is provided with a pump grip (13), that the pump housing (19) at an inlet (9) has a first connection element (3) for joining with a corresponding first connection element (5) on the outlet (20) of the reservoir (1), and that the pump housing has a second connection element (17) at an outlet (21) for joining with a corresponding second connection element (22) on the needle (18) or the catheter.

2. Device according to claim 1, characterised in that the pump piston (12) is formed by a piston crown (23) and a piston rod (24), and that the pump chamber (11) is formed between the piston crown (23) on the pump piston and the outlet (21) of the pump housing.

3. Device according to claim 1 or 2, characterised in that the first connection element is provided in the form of a pointed cannula (3).

4. Device according to claim 1, 2 or 3, characterised in that the pump piston (12) is connected via a piston rod (24) with a pump grip (13) which is pivotably suspended by links (13, 14), and which is actuated for transferring liquid from the reservoir (1) to the hypodermic needle (18) or the catheter for introducing the liquid into the tissue.

5. Device according to any preceding claim, characterised in that it is constituted by a disposable unit in which reservoir (1) and pump (8) are integrated.

6. Device according to any preceding claim, characterised in that a filter (16) is provided in connection with the outlet (6) of the reservoir.

7. Device according to any preceding claim, characterised in that the connection to the outlet (6) of the reservoir is made with an air intake (27) for substituting displaced liquid from the reservoir (1).

8. Device according to any preceding claim, characterised in that a stroke adjustment is provided for setting dosed volume in each stroke.

9. Device according to any preceding claim, characterised in that the pump grip (13) is provided with recesses (25) for finger grip.

10. Device according to any of claims 4-9, characterised in that the pump grip (13) and the joints (14) are provided with a friction lining.