Automatic injection device

• US 20050143653A1
• Filed: 03/02/2005
• Published: 06/30/2005
• Est. Priority Date: 10/03/2000
• Status: Abandoned Application

• Current Assignee: Nemoto Kyorindo Company Limited
• Original Assignee: Nemoto Kyorindo Company Limited
• Inventors: Fukuda, Takashi
• Application Number:
  US11/068,878
• Publication Number:
  US 20050143653A1
• Time in Patent Office: Days
• US Class Current: 600/432
• 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 brake, wherein said brake is turned on when the piston holder of a first head is in a forward-moving state and the piston holder of a second head is in a stopped state, whereby backward-moving of the second head is prohibited, and wherein said brake is turned off when the second head is in a moving 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 brake 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 brake prohibits the linear movement in the backward direction.

4. The automatic injection device according to claim 1, wherein said brake is a disc brake.

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.

11. 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.

12. 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.

13. The automatic injection device according to claim 11, 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.

14. The automatic injection device according to claim 11, wherein the tips of the two syringes are connected to a three way-branched tube.

15. The automatic injection device according to claim 13, wherein the tips of the two syringes are connected to a three way-branched tube.

10. 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 first head and a second head, wherein the force of a motor for driving the second head is transmitted to a piston holder of the second head via a worm gear while a worm gear is not provided in the transmission from a motor for driving a piston holder of the first head.