Hand-Held Electronically Controlled Injection Device For Injecting Liquid Medications

• US 20100160857A1
• Filed: 03/04/2010
• Published: 06/24/2010
• Est. Priority Date: 02/18/2004
• Status: Active Grant

• Current Assignee: Ares Trading SA (Merck & Co., Inc.)
• Original Assignee: Ares Trading SA (Merck & Co., Inc.)
• Inventors: Kogler, Gerhard, Pongpairochana, Vincent, Prasser, Robert, Wurmbauer, Werner, MacLean, Timothy John, Lauchard, Gerhard
• Granted Patent: US 7,967,784 B2
• Time in Patent Office: Days
• US Class Current: 604/93.10
• CPC Class Codes: A61M 2005/2013 triggering of discharging means by contact of injector with patient body
• CPC Class Codes: A61M 2005/208 Release is possible only when device is pushed against the skin, e.g. using a trigger which is blocked or inactive when the device is not pushed against the skin
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/2496 via pivot
• CPC Class Codes: A61M 2005/31518 designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members
• CPC Class Codes: A61M 2005/31588 electrically driven
• CPC Class Codes: A61M 2205/13 with means for the detection of operative contact with patient, e.g. lip sensor
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/3561 local, e.g. within room or hospital
• CPC Class Codes: A61M 2205/3584 using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/6027 Electric-conductive bridges closing detection circuits, with or without identifying elements, e.g. resistances, zener-diodes
• CPC Class Codes: A61M 2205/6072 Bar codes
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 5/20 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 Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/326 Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
• CPC Class Codes: A61M 5/34 Constructions for connecting the needle , e.g. to syringe nozzle or needle hub connecting catheter tubes to hubs A61M25/0014
• CPC Class Codes: A61M 5/48 : having means for varying, regulating, indicating or limiting injection pressure A61M5/142 takes precedence ; monitoring pressure in infusion systems A61M5/16854

Abstract

A medication delivery device includes a housing, a door coupled to the housing and moveable between a closed position and an open position. The door permits insertion of a medication container, containing liquid medication, into the housing in the open position. A door opening mechanism is coupled to the door. A push member is axially moveable between a retracted position and a non-retracted position and located external to the medication container. The push member enters the medication container and pushes the liquid medication out of the medication container. A lock mechanism is coupled to the door opening mechanism and prevents opening of the door when the push member is in the non-retracted position inside the medication container, wherein the lock mechanism automatically unlocks the door opening mechanism when the push member is in the retracted position.

Claims

1. A medication delivery device comprising:

a housing, a door which, in an open position, permits insertion/removal of a medication container into/from the housing;

a door opening mechanism for opening/closing the door; and

a push member which can be moved axially from a retracted position, located outside the medication container, to enter said medication container and push liquid medication contained in said medication container out of the medication container to deliver it to a patient, and then return to its retracted position, the push member further comprising;

a lock mechanism for locking at least part of the door opening mechanism to prevent opening of the door, when the push member is inside the medication container and for unlocking the door opening mechanism when the push member is in its retracted position.

2. The device of claim 1, further comprising a door opening button coupled to the door opening mechanism, wherein the lock mechanism is designed to lock the door opening button when the push member is inside the medication container.

3. The device of claim 2, wherein the lock mechanism further comprises a first lever which, in a rest position, locks the door opening button and is actuated by the push member during retraction of the push member to unlock the door opening button.

4. The device of claim 2 wherein the lock mechanism further comprises a part movable in the direction of displacement of the said push member and which, in a rest position, is out of contact with the first lever and, during retraction of the push member, is pushed by an end portion of said push member to come into contact with and actuate the first lever.

5. The device of claim 2, wherein the door opening mechanism comprises:

a door opening button movable in a direction of displacement of the push member;

a second lever actuated by the door opening button;

a locking member movable in the direction of displacement and actuated by the second lever and having a first flange; and

a medication container holder for holding the medication container inside the housing, the medication container holder having a second flange designed to cooperate with the first flange and being pivotable with the door from the closed position to an open position when the second flange is released by the first flange.

6. A medication delivery device comprising:

a housing,

a door coupled to the housing and moveable between a closed position and an open position, the door permits insertion of a medication container into the housing when in the open position, the medication container containing liquid medication therein;

a door opening mechanism coupled to the door; and

a push member axially moveable between a retracted position and a non-retracted position, the push member located external to the medication container, wherein the push member enters the medication container and pushes the liquid medication out of the medication container to deliver it to a patient;

a lock mechanism coupled to the door opening mechanism and prevents opening of the door when the push member is in the non-retracted position inside the medication container, wherein the lock mechanism automatically unlocks the door opening mechanism when the push member is in the retracted position.

7. The device of claim 6, further comprising a door opening button coupled to the door opening mechanism, wherein the lock mechanism is designed to lock the door opening button when the push member is inside the medication container.

8. The device of claim 7, wherein the lock mechanism further comprises a first lever which, in a rest position, locks the door opening button and is actuated by the push member during retraction of the push member to unlock the door opening button.

9. The device of claim 7 wherein the lock mechanism further comprises a part movable in the direction of displacement of the said push member and which, in a rest position, is out of contact with the first lever and, during refraction of the push member, is pushed by an end portion of said push member to come into contact with and actuate the first lever.

10. The device of claim 7, wherein the door opening mechanism comprises:

a door opening button movable in a direction of displacement of the push member;

a second lever actuated by the door opening button;

a locking member movable in the direction of displacement and actuated by the second lever and having a first flange; and

a medication container holder for holding the medication container inside the housing, the medication container holder having a second flange designed to cooperate with the first flange and being pivotable with the door from the closed position to an open position when the second flange is released by the first flange.