Injection syringe with needle shield loaded with a spring
US6565540B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2000 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Nov 17, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3253
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An injection syringe having a body (12) bearing an injection needle (14), a reservoir (16) containing a liquid (42) to be injected and being movable relative to the body (12) for causing the liquid to be injected to circulate through the needle (14), and a needle shield (18) movably mounted relative to the needle (14) for movement, under the control of a spring (20), from a retracted position towards an active protective position. The syringe has complementary parts (54, 62) which, when engaged, retain a first spring (20) end cooperating with the shield (18), and which, when disengaged by further movement of the reservoir (16), release the spring (20) first end to displace the shield (18) to its active protective position. The second spring (20) end is pressed against the reservoir (16) for gradually compressing the spring (20) during injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.