Syringe pump control systems using a light sensor
First Claim
Patent Images
1. A medication pump comprising:
- a cartridge chamber for receiving a medication cartridge, the chamber comprising a first open end for receiving the medication cartridge, a second end defining a drive rod opening, and a cartridge chamber wall extending from the first open end to the second end;
a motor;
a drive rod comprising an interface end, wherein the interface end of the drive rod extends into the cartridge chamber through the drive rod opening, wherein the drive rod is configured to be axially moved by the motor; and
a light sensor positioned near the second end of the cartridge chamber configured to detect whether the medication cartridge is located within the cartridge chamber near the second end of the cartridge chamber, wherein the light sensor comprises an emitter and a detector, wherein the emitter and detector are positioned at opposite ends of a chord through the cartridge chamber, wherein the chord connects two points on the cartridge chamber wall.
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Accused Products
Abstract
Sensors are described that may be provided in a medication pump. A light sensor may be provided that detects if a cartridge is present in a cartridge chamber. A medication cartridge includes an opaque area at its open end for use with the light sensor.
140 Citations
26 Claims
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1. A medication pump comprising:
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a cartridge chamber for receiving a medication cartridge, the chamber comprising a first open end for receiving the medication cartridge, a second end defining a drive rod opening, and a cartridge chamber wall extending from the first open end to the second end;
a motor;
a drive rod comprising an interface end, wherein the interface end of the drive rod extends into the cartridge chamber through the drive rod opening, wherein the drive rod is configured to be axially moved by the motor; and
a light sensor positioned near the second end of the cartridge chamber configured to detect whether the medication cartridge is located within the cartridge chamber near the second end of the cartridge chamber, wherein the light sensor comprises an emitter and a detector, wherein the emitter and detector are positioned at opposite ends of a chord through the cartridge chamber, wherein the chord connects two points on the cartridge chamber wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A medication pump system comprising:
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a medication cartridge comprising;
a cylindrical barrel wall comprising an open end and a closed end, wherein the closed end defines an orifice, and a plunger slidably received within the barrel wall; and
a medication pump comprising;
a cartridge chamber for receiving the medication cartridge, the chamber comprising a first open end for receiving the medication cartridge and a second end defining a drive rod opening, a motor, a drive rod comprising an interface end, wherein the interface end of the drive rod extends into the cartridge chamber through the drive rod opening, wherein the drive rod is configured to be axially moved by the motor, wherein the interface end is configured to attach to the plunger so that the drive rod can retract or advance the plunger; and
a light sensor positioned near the second end of the cartridge chamber configured to detect whether the medication cartridge is located within the cartridge chamber near the second end of the cartridge chamber. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A medication pump comprising:
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a cartridge chamber for receiving a medication cartridge, the chamber comprising a first open end for receiving the medication cartridge, a second end defining a drive rod opening, and a cartridge chamber wall extending between the first open end and the second end;
a motor;
a drive rod comprising an interface end, wherein the interface end of the drive rod extends into the cartridge chamber through the drive rod opening, wherein the drive rod is configured to be axially moved by the motor wherein the chord connects two points on the cartridge chamber wall; and
a light sensor including an emitter and a detector, the emitter and detector positioned at opposite ends of a chord through the cartridge chamber, wherein the chord passes through a portion of the medication cartridge when the medication cartridge is in the cartridge chamber, wherein the chord does not pass through the drive rod. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification