Hypodermic syringe
US4900311A · kind A · utility
97Cited by
3References
8Claims
0Family size
Inventors
Key dates
| Filing date | Dec 6, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Dec 6, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3246
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hypodermic syringe has a needle guard of elliptical cross section which is releasable by compressing the needle guard along its major axis, and, which can be moved between an extended and a retracted position when released. Optionally, a compression spring is provided for urging the needle guard towards an extended position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.