Automatic injection device

• US 20020049415A1
• Filed: 09/27/2001
• Published: 04/25/2002
• Est. Priority Date: 10/03/2000
• Status: Active Grant

• Current Assignee: Nemoto Kyorindo Company Limited
• Original Assignee: Nemoto Kyorindo Company Limited
• Inventors: Fukuda, Takashi
• Granted Patent: US 6,917,828 B2
• Time in Patent Office: Days
• US Class Current: 604/191
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• 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

Abstract

An automatic injection device has piston holders holding cylinder pistons and plural systems of heads having a drive mechanism for moving the piston holders forward and backward so that the device can hold a plurality of syringes and operates injection or suction in each syringe independently. This device also has a mechanism for prohibiting the backward-moving of the piston holder of a second head when the piston holder of a first head is in a forward-moving state and the piston holder of the second head is in a stopped state. This structure effectively prevents liquid from being undesirably mixed and the injection amount thereof from becoming less accurate.

Claims

1. An automatic injection device comprising piston holders holding cylinder pistons and plural systems of heads having a drive mechanism for moving the piston holders forward and backward, whereby the device can hold a plurality of syringes and operates injection or suction in each syringe independently,

said device comprising a backward-moving prohibition mechanism for prohibiting the backward-moving of the piston holder of a second head when the piston holder of a first head is in a forward-moving state and the piston holder of the second head is in a stopped state.

2. The automatic injection device according to claim 1, wherein said drive mechanism has a motor and mechanism for converting the rotation of the motor into a linear movement, and said backward-moving prohibition mechanism prohibits the axis of rotation to rotate in the backward direction.

3. The automatic injection device according to claim 1, wherein said drive mechanism has a motor and mechanism for converting the rotation of the motor into a linear movement, and said backward-moving prohibition mechanism prohibits the linear movement in the backward direction.

4. The automatic injection device according to claim 1, wherein said backward-moving prohibition mechanism is selected from the group consisting of an electromagnetic brake, a disc brake, a ratchet and a worm gear.

5. The automatic injection device according to claim 1, wherein said device is a double head type with the number of systems of heads being two and holds two syringes.

6. The automatic injection device according to claim 1, wherein said device holds a syringe for injecting a contrast medium and another syringe for injecting a physiological saline solution.

7. The automatic injection device according to claim 5, wherein said device holds a syringe for injecting a contrast medium at the first head and a syringe for injecting a physiological saline solution at the second head.

8. The automatic injection device according to claim 5, wherein the tips of the two syringes are connected to a three way-branched tube.

9. The automatic injection device according to claim 7, wherein the tips of the two syringes are connected to a three way-branched tube.