Infusion pump system, an infusion pump unit and an infusion pump
First Claim
Patent Images
1. An infusion pump device, comprising:
- a portable pump housing defining a space to receive insulin;
a user interface engaged with the portable pump housing, the user interface comprising a display device that shows data to a user;
a piston rod defining an exterior thread pattern and linearly movable in an axial direction in the housing to advance from a first position to a second position so as to dispense insulin from the pump housing when insulin is received in the pump housing;
a ratchet mechanism to urge the piston rod from the first position to the second position;
a gear that is rotatable in an activation direction to drive the piston rod from the first position to the second position, wherein the ratchet mechanism comprises a ratchet body that engages the gear, the ratchet body being adjustable from a non-activating position to an activating position so as to incrementally rotate the gear in the activation direction, and wherein the ratchet body maintains physical contact with the gear when moving between the non-activating position and the activating position; and
a spring device that provides a drive force to the ratchet mechanism to advance the piston rod to the second position and thereby dispense insulin from the pump housing by mechanical power of the spring device when insulin is received in the pump housing.
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Accused Products
Abstract
An infusion pump unit includes a housing sized to allow the pump unit to be carried as a portable unit. The housing contains a controllable pumping system for pumping fluid. The pump actuator is lighter, smaller, quieter and less power consuming.
237 Citations
28 Claims
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1. An infusion pump device, comprising:
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a portable pump housing defining a space to receive insulin; a user interface engaged with the portable pump housing, the user interface comprising a display device that shows data to a user; a piston rod defining an exterior thread pattern and linearly movable in an axial direction in the housing to advance from a first position to a second position so as to dispense insulin from the pump housing when insulin is received in the pump housing; a ratchet mechanism to urge the piston rod from the first position to the second position; a gear that is rotatable in an activation direction to drive the piston rod from the first position to the second position, wherein the ratchet mechanism comprises a ratchet body that engages the gear, the ratchet body being adjustable from a non-activating position to an activating position so as to incrementally rotate the gear in the activation direction, and wherein the ratchet body maintains physical contact with the gear when moving between the non-activating position and the activating position; and a spring device that provides a drive force to the ratchet mechanism to advance the piston rod to the second position and thereby dispense insulin from the pump housing by mechanical power of the spring device when insulin is received in the pump housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for dispensing insulin from a portable infusion pump device, the method comprising:
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receiving input via a user interface that is engaged with a portable pump housing that defines a space containing insulin, the user interface comprising a display device that shows data related to insulin treatment and a plurality of buttons for actuation; providing a drive force from a spring device to a ratchet mechanism that engages a gear arranged in the portable pump housing, the ratchet mechanism comprising a ratchet body that is adjustable from a non-activating position to an activating position when the drive force is provided by the spring, wherein the ratchet body maintains physical contact with the gear when moving between the non-activating position and the activating position; and advancing a piston rod under mechanical power from the spring device from a first position to a second position so as to dispense the insulin from the pump housing, the piston rod being linearly moved in an axial direction in the housing and being urged to the second position when the spring device provides the drive force to adjust the ratchet body from the non-activating position to the activating position. - View Dependent Claims (17, 18, 19)
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20. An infusion pump device, comprising:
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a portable pump housing defining a space to receive insulin; a user interface engaged with the portable pump housing, the user interface comprising a display device that shows data to a user; a piston rod defining an exterior thread pattern and movably arranged in the housing to advance from a first position to a second position so as to dispense insulin from the pump housing when insulin is received in the pump housing; a ratchet mechanism to urge the piston rod from the first position to the second position; a gear that is rotatable in an activation direction to drive the piston rod from the first position to the second position, wherein the ratchet mechanism comprises a ratchet body that engages the gear, the ratchet body being adjustable from a non-activating position to an activating position so as to incrementally rotate the gear in the activation direction, and wherein the ratchet body maintains physical contact with the gear when moving between the non-activating position and the activating position; a pawl that is pivotably arranged on a pivot and is biased by a tension spring so as to constantly abut a rim of the gear; and a spring device that provides a drive force to the ratchet mechanism to advance the piston rod to the second position and thereby dispense insulin from the pump housing by mechanical power of the spring device when insulin is received in the pump housing. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification