Syringe for withdrawing blood
US4813433A · kind A · utility
Inventor
Key dates
| Filing date | Apr 11, 1988 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Apr 11, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/150503
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe for withdrawing fluids which consists of novel new one-handed operated syringe. Said one-handed or therapeutic syringe is described as a therapeutic syringe comprising a double compartmented housing, a piston disposed in one of said compartments, a piston rod connected to said piston controlling the movement of said piston in a barrel, vent means associated with said piston compartment, said other non-piston compartment being formed with needle hub for supporting a needle and having an opening in fluid communication with said piston compartment whereby when said piston is moved forward in said barrel in said piston compartment, air will be discharged therefrom while drawing liquid into said other compartment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.