Peristaltic micropump with exchangeable pump head
First Claim
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1. An injection device for injecting a pharmaceutical, the injection device comprising:
- a) an injection device body;
b) a motor within the device body;
c) a cartridge compartment within the injection device body, the cartridge compartment configured to receive a cartridge containing the pharmaceutical, the cartridge comprising a cylinder having an interior treated surface to reduce sliding forces of a movable stopper sealing one end of the cylinder and a cannula puncturable sealing disk sealing a second end of the cylinder, where the moveable stopper is configured to be slidably displaced axially towards the sealing disk within the cylinder to bring about a change in volume of the cylinder during injection;
d) an exchangeable pump head of a peristaltic pump which is driven by the motor and by means of which the pharmaceutical is conveyed out of the cartridge; and
e) control electronics comprising an adjusting mechanism, the adjusting mechanism allows presetting an amount of the pharmaceutical to be injected, the control electronics contained within the injection device body;
wherein the exchangeable pump head is configured to be detachable from and reconnectable to both the motor and the cartridge and comprisesdetachable and functionally reconnectable interfaces to directly connect the exchangeable pump head to the motor anddetachable and functionally reconnectable interfaces to directly connect the exchangeable pump head to the cartridge.
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Abstract
The present invention relates to a device for injecting a pharmaceutical into the human or animal body by means of a simply and quickly exchangeable motorized pump head.
15 Citations
34 Claims
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1. An injection device for injecting a pharmaceutical, the injection device comprising:
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a) an injection device body; b) a motor within the device body; c) a cartridge compartment within the injection device body, the cartridge compartment configured to receive a cartridge containing the pharmaceutical, the cartridge comprising a cylinder having an interior treated surface to reduce sliding forces of a movable stopper sealing one end of the cylinder and a cannula puncturable sealing disk sealing a second end of the cylinder, where the moveable stopper is configured to be slidably displaced axially towards the sealing disk within the cylinder to bring about a change in volume of the cylinder during injection; d) an exchangeable pump head of a peristaltic pump which is driven by the motor and by means of which the pharmaceutical is conveyed out of the cartridge; and e) control electronics comprising an adjusting mechanism, the adjusting mechanism allows presetting an amount of the pharmaceutical to be injected, the control electronics contained within the injection device body; wherein the exchangeable pump head is configured to be detachable from and reconnectable to both the motor and the cartridge and comprises detachable and functionally reconnectable interfaces to directly connect the exchangeable pump head to the motor and detachable and functionally reconnectable interfaces to directly connect the exchangeable pump head to the cartridge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A device for injecting a pharmaceutical, the device comprising at least:
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a housing including a motor, the housing configured to receive a cartridge comprising a cylinder having an interior treated surface to reduce sliding forces of a moveable stopper and a sealing disk, where the sealing disk is puncturable by a cannula and where the moveable stopper is configured to be displaced to bring about a change in volume of the cartridge during injection; control electronics; an exchangeable pump head for a peristaltic pump configured to be detachable from and reconnectable to both the housing and the control electronics, the pump head driven by the motor and by means of which the pharmaceutical is conveyed out of the cartridge, the pump head being equipped with detachable and functionally reconnectable interfaces to the motor.
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Specification