Dispensing fluid from an infusion pump system
First Claim
Patent Images
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 string member coupled to the pawl, the string member being arranged in a loop around two or more guide structures; and
a rotational motor coupled to the string member so that rotation by the motor causes the string member to adjust the pawl relative to the ratchet body, wherein the string member is twisted by one or more rotations of the rotational motor and thereby urges the pawl to adjust relative to the ratchet body.
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Accused Products
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.
350 Citations
38 Claims
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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 string member coupled to the pawl, the string member being arranged in a loop around two or more guide structures; and a rotational motor coupled to the string member so that rotation by the motor causes the string member to adjust the pawl relative to the ratchet body, wherein the string member is twisted by one or more rotations of the rotational motor and thereby urges the pawl to adjust relative to the ratchet body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. 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 string member coupled to the pawl, the string member being arranged in a loop around two or more guide structures; and a rotational motor coupled to the string member so that rotation by the motor causes the string member to adjust the pawl relative to the ratchet body; and a removable controller device that is mechanically and electrically connectable to the pump device. - View Dependent Claims (16, 17, 18, 19, 20)
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21. 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 string member coupled to the pawl, the string member being arranged in a loop around two or more guide structures, wherein at least one of the guide structures is fixedly positioned relative to the rotational motor, and wherein at least one of the guide structures is fixedly positioned relative to the pawl; and a rotational motor coupled to the string member so that rotation by the motor causes the string member to adjust the pawl relative to the ratchet body. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. 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 string member coupled to the pawl, the string member being arranged in a loop around two or more guide structures; and a rotational motor coupled to the string member so that rotation by the motor causes the string member to adjust the pawl relative to the ratchet body, wherein one or more rotations by the motor causes the string member to apply a tension force to the pawl, and wherein one or more rotations by the motor causes a portion of the string member between the rotational motor and the guide structures to be twisted. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
Specification