Disposable hypodermic syringe
US5171300A · kind A · utility
47Cited by
13References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1992 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Apr 16, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3224
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe and needle assembly having a piston that is formed to engage and retract the needle assembly into the syringe barrel. The piston includes a spring member that is elastically deformed by the attachment of the piston to the needle assembly. The spring member causes the needle assembly to be spring biased into a canted position so that, once retracted into the syringe barrel, the needle assembly cants to an inoperable position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.