Infusion pump
US6413239B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1999 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Nov 17, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/14586
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention is directed to an improved infusion pump (15). In the preferred embodiment, the infusion pump is comprised of an elastomeric hollow balloon (140) and a longitudinal member (110), the balloon having an axial and radial dimension and an open end (22), the longitudinal member (110) having an insertion member (16) extending into the hollow portion (24) of the balloon, the insertion member and the balloon being so configured that the insertion member stretches the elastomeric balloon in the radial direction, but does not stretch the balloon in an axial direction, whereby the infusion pump delivers the quantity of liquid at a substantially constant flow rate. The present invention also discloses an infusion pump comprising a hollow inert membrane (130), an insertion member extending into the hollow portion (23) of the membrane, and the insertion member and the membrane extending into the hollow portion of the balloon, such that the membrane is between the insertion member and the balloon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.