Safety syringe with retractable self-biased needle
US5232458A · kind A · utility
Inventor
Key dates
| Filing date | Sep 28, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Sep 28, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3231
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety syringe includes: a hollow needle secured in a front portion of the syringe for injection use having a needle head portion formed on a rear portion of the needle, and a plunger slidably held in the syringe for boosting a liquid medicine in the syringe to be injected into a patient through the hollow needle having a biasing socket recessed in a front portion of the plunger engageable with the needle head portion for biasing the needle obliquely within the syringe when retracting the plunger and the needle into the syringe, thereby preventing an outward protruding of the retracted needle for preventing its injury or infectious contamination to the surroundings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.