Infusion device and driving mechanism and process for same with actuator for multiple infusion uses
First Claim
1. A coil cup composed of a magnetizable material, the coil cup comprising:
- a generally annular inner wall having one end defining an inner pole surface of the coil cup;
a generally annular outer wall having a first inner diameter and a first outer diameter, the outer wall having a generally annular shelf portion extending from the outer wall towards the inner wall, the shelf portion having a second inner diameter and a second outer diameter, the second inner diameter being smaller than the first inner diameter, the shelf portion having a second end defined by the second inner and outer diameters, the second end defining at least a portion of an outer pole surface of the coil cup; and
a generally annular interior between the inner and outer walls, the annular interior containing a coil.
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Accused Products
Abstract
A drive mechanism for delivery of infusion medium a coil capable of being electrically activated to provide an electromagnetic field. The coil surrounds a piston channel extending in an axial direction. An armature is located adjacent the coil, on one side of the axial channel. The armature is moveable toward a forward position, in response to the electromagnetic field produced by activation of the coil. A piston is located within the piston channel and is moveable axially within the channel to a forward position, in response to movement of the armature to its forward position. The armature and piston are moved toward a retracted position, when the coil is not energized. The armature may be configured with a reduced diameter by including a coil cup for supporting the coil including a shelf portion defining at least a portion of a pole surface of the coil cup.
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Citations
38 Claims
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1. A coil cup composed of a magnetizable material, the coil cup comprising:
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a generally annular inner wall having one end defining an inner pole surface of the coil cup;
a generally annular outer wall having a first inner diameter and a first outer diameter, the outer wall having a generally annular shelf portion extending from the outer wall towards the inner wall, the shelf portion having a second inner diameter and a second outer diameter, the second inner diameter being smaller than the first inner diameter, the shelf portion having a second end defined by the second inner and outer diameters, the second end defining at least a portion of an outer pole surface of the coil cup; and
a generally annular interior between the inner and outer walls, the annular interior containing a coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A coil cup composed of a magnetizable material, the coil cup comprising:
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a generally annular inner wall having one end defining an inner pole surface of the coil cup;
a generally annular outer wall having a first inner diameter and a first outer diameter, at least one of the first inner diameter and the first outer diameter defining at least a portion of an outer pole surface of the coil cup; and
a generally annular lip extending from the inner wall towards the outer wall, wherein the generally annular inner wall and the generally annular outer wall define a generally annular interior, and wherein the generally annular interior contains a coil. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A driving mechanism for an infusion device, the driving mechanism comprising:
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a coil arranged to be selectively energized;
a piston moveable in a piston channel in response to energizing the coil, for conveying an infusion media;
a coil cup composed of a magnetizable material, the coil cup comprising;
a generally annular inner wall having one end defining an inner pole surface of the coil cup;
a generally annular outer wall having a first inner diameter and a first outer diameter, the outer wall having a generally annular shelf portion extending from the outer wall towards the inner wall, the shelf portion having a second inner diameter and a second outer diameter, the second inner diameter being smaller than the first inner diameter, the shelf portion having a second end defined by the second inner and outer diameters, the second end defining at least a portion of an outer pole surface of the coil cup; and
a generally annular interior between the inner and outer walls, the annular interior containing a coil. - View Dependent Claims (34, 35)
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36. A drive mechanism for an infusion device, the drive mechanism comprising:
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a coil arranged to be selectively energized;
a piston moveable in a piston channel in response to energizing the coil, for conveying an infusion media;
a coil cup composed of a magnetizable material, the coil cup comprising;
a generally annular inner wall having one end defining an inner pole surface of the coil cup;
a generally annular outer wall having a first inner diameter and a first outer diameter, at least one of the first inner diameter and the first outer diameter defining at least a portion of an outer pole surface of the coil cup; and
a generally annular lip extending from the inner wall towards the outer wall, wherein the generally annular inner wall and the generally annular outer wall define a generally annular interior, and wherein the generally annular interior contains a coil. - View Dependent Claims (37, 38)
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Specification