Device for measuring a volume of drug

• US 20040069044A1
• Filed: 09/16/2003
• Published: 04/15/2004
• Est. Priority Date: 04/29/1999
• Status: Abandoned Application

• Current Assignee: Elan Pharma International Limited (Perrigo Company PLC)
• Original Assignee: Elan Pharma International Limited (Perrigo Company PLC)
• Inventors: Lavi, Gilad, Yigal, Gil, Tsals, Izrail
• Application Number:
  US10/663,929
• Publication Number:
  US 20040069044A1
• Time in Patent Office: Days
• US Class Current: 73/1.73
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/3128 Incorporating one-way valves, e.g. pressure-relief or non-return valves
• CPC Class Codes: A61M 2005/3152 including gearings to multiply or attenuate the piston displacing force
• CPC Class Codes: A61M 2005/3223 Means impeding or disabling repositioning of used needles at the syringe nozzle
• CPC Class Codes: A61M 2205/215 Tilt detection, e.g. for warning or shut-off
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 5/1782 Devices aiding filling of syringes in situ combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003
• CPC Class Codes: A61M 5/19 having more than one chamber , e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly surgical glue applicators A61B17/00491
• CPC Class Codes: A61M 5/2046 Media being expelled from injector by gas generation, e.g. explosive charge
• CPC Class Codes: A61M 5/2053 Media being expelled from injector by pressurised fluid or vacuum for infusion A61M5/145, A61M5/155
• CPC Class Codes: A61M 5/2425 by compression of deformable ampoule or carpule wall
• CPC Class Codes: A61M 5/2448 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/3234 Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user

Abstract

A device for measuring a volume of liquid drug. The device includes a first chamber containing liquid drug, a measurement chamber in liquid communication with the first chamber, and a measurement assembly.

Claims

1. A device for measuring and delivering a desired volume of liquid drug, said device comprising:

a housing including;

a first chamber containing liquid drug;

a measurement chamber in liquid communication with the first chamber;

a measurement assembly for establishing a desired amount of liquid drug; and

a skin-penetrating member, in fluid communication with said measurement assembly, for delivering said desired amount of liquid drug to a living being.

2. The device of claim 1 wherein the measurement assembly comprises:

a piston, slidably received in the measurement chamber;

a member in radial transmission relation to the piston; and

a knob in radial transmission relation to the member whereby movement of the knob moves the piston along the measurement chamber which causes aspiration of the liquid drug into the measurement chamber.

3. The device of claim 2 wherein the piston comprises a piston head and a threaded rod.

4. The device of claim 3 wherein the piston head is made of rubber.

5. The device of claim 2 wherein the member has axial internal threads along a portion of its length.

6. The device of claim 2 wherein the measurement assembly further comprises:

a sleeve slidably received within the measurement chamber along a portion of the length of the chamber, and for slidably receiving the member, the sleeve having a annular recess;

and a spring mounted axially within the sleeve.

7. The device of claim 6 wherein the member further comprises an annular extension along a portion of the outer surface of the member to matingly engage the annular recess when said knob is pressed.

8. The device of claim 7 wherein one end of the sleeve abuts the measurement chamber wall and the other end of the sleeve abuts the knob.