Patch-like infusion device
First Claim
1. A patch-like infusion device, comprising:
- a fluid reservoir having at least one flexible wall;
at least one patient needle in fluid communication with said reservoir;
a Belleville spring having a central aperture for applying pressure to said flexible wall to cause fluid to flow from said reservoir to said patient needle; and
a pin engageable with said central aperture and disengageable therefrom for causing said Belleville spring to begin applying said pressure when said infusion device is placed into operation.
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Accused Products
Abstract
A system and method for a patch-like, self-contained substance infusion device which provides one or more substantially hidden patient needles which can be placed in fluid communication with a fluid reservoir subassembly that includes a rigid bladder portion used in conjunction with a non-distensible bladder film, such as a metallized film. Simple removal of an interlock allows a disk, or Belleville spring assembly to apply an essentially even and constant pressure to the contents of the fluid reservoir assembly, and allows the device to then be attached to a skin surface via an adhesive contact surface. A push button activation assembly is provided which can then be used to release and seat one or more spring-loaded patient needles into the skin surface, and establish a fluid communication path between the patient needles and the pressurized fluid reservoir contents thereby delivering an infusion into the skin.
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Citations
11 Claims
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1. A patch-like infusion device, comprising:
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a fluid reservoir having at least one flexible wall;
at least one patient needle in fluid communication with said reservoir;
a Belleville spring having a central aperture for applying pressure to said flexible wall to cause fluid to flow from said reservoir to said patient needle; and
a pin engageable with said central aperture and disengageable therefrom for causing said Belleville spring to begin applying said pressure when said infusion device is placed into operation. - View Dependent Claims (2, 3, 4, 5)
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6. A patch-like infusion device, comprising:
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a fluid reservoir having at least one flexible wall;
at least one patient needle in fluid communication with said reservoir;
a Belleville spring for applying pressure to said flexible wall to cause fluid to flow from said reservoir to said patient needle; and
means engageable with said Belleville spring and disengageable therefrom for causing said Belleville spring to begin applying said pressure when said infusion device is placed into operation. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification