Device for automatic injection of a dose of medicinal product
US6575939B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2000 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Aug 3, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/583
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention concerns a single-use device for injecting a dose of a medicinal product, comprising a syringe (1) and a piston rod (7) provided with a collar (9) housed in a casing formed of two parts, a front part (11) and a rear part (10), fitted inside each other and capable of sliding in relation to each other over a short traverse between two positions, a retracted position and a forward position. This device additionally includes means (35) for supporting the collar (9) of the piston rod (7) arranged so as to permit, on the one hand, injection under the effect of a propulsion spring (50) in the forward position of the parts (10, 11) of the casing and, on the other hand, backward movement of the syringe (1) inside the casing, after injection, in the retracted position of the said parts of the casing. It also includes means (28, 29) for viewing the supporting means (35) at the end of injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.