Automatic injection device
First Claim
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 ratchet and a ratchet pole, wherein when the piston holder of a first head is in a forward-moving state then said ratchet pole is engaged with said ratchet whereby the piston holder of a second head is in a stopped state and backward-moving of the second head is prohibited, and wherein the engagement is releasable in order to allow the second head to move in a backward-moving state.
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Accused Products
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.
60 Citations
16 Claims
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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 ratchet and a ratchet pole, wherein when the piston holder of a first head is in a forward-moving state then said ratchet pole is engaged with said ratchet whereby the piston holder of a second head is in a stopped state and backward-moving of the second head is prohibited, and wherein the engagement is releasable in order to allow the second head to move in a backward-moving state.
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9. 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 an electromagnetic brake, wherein said electromagnetic 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 electromagnetic brake is turned off when the second head is moving state.
Specification