Dispensing fluid from an infusion pump system
First Claim
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1. A medical infusion pump system, comprising:
- a pump device having a drive system to cause dispensation of a medicine, the drive system including;
a pawl that is adjustable relative to a ratchet body, the pawl engaging one or more teeth of the ratchet body to incrementally advance the ratchet body;
a flexible member coupled to the pawl;
a spindle coupled to the flexible member; and
a rotational motor coupled to the spindle so that rotation by the motor causes the flexible member to wind or unwind around the spindle to thereby adjust the pawl relative to the ratchet body.
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Abstract
Some embodiments of an infusion pump device may include a drive system that accurately and incrementally dispenses fluid from the pump device in a controlled manner. Particular embodiments of the drive system may include a rotational motor that is coupled to a string member, which is used to adjust a pawl relative to a ratchet body. In such circumstances, the drive system can provide a reliable and compact infusion pump device that accurately dispenses the desired volume of fluid.
364 Citations
31 Claims
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1. A medical infusion pump system, comprising:
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a pump device having a drive system to cause dispensation of a medicine, the drive system including; a pawl that is adjustable relative to a ratchet body, the pawl engaging one or more teeth of the ratchet body to incrementally advance the ratchet body; a flexible member coupled to the pawl; a spindle coupled to the flexible member; and
a rotational motor coupled to the spindle so that rotation by the motor causes the flexible member to wind or unwind around the spindle to thereby adjust the pawl relative to the ratchet body. - 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)
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Specification