Device for injecting a liquid
US5879336A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1996 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Mar 12, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/1405
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a portable and non-implantable device to enable a patient to self-administer, on demand, successive doses of a liquid while ensuring that the period of time between two successive administrations cannot be less than a reference value. The device has a liquid reservoir formed in a piston which can be pushed in a chamber to expel the contents of the chamber via an injection outlet and which is returned in the opposite direction by a return. The liquid reservoir communicates with the inside of the chamber via a passage formed through the piston and is provided with a flow rate limiter so that the time required to fill the chamber corresponds to a reference value. The invention is suitable for medical applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.