Disposable injection syringe
US5527285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1994 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Nov 10, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3231
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Injection syringe of disposable type, including a cylinder (91), in which a piston is displaceable in and out respectively, a piston rod (3) having a press plate (12), and an injection needle (4) at the end of the syringe cylinder (1). The syringe needle (4) is mounted from inside the syringe cylinder (1) and is releasably connected (5, 9) to the syringe cylinder (1). The syringe needle (4) or the carrier (5) thereof is formed with one or more blocking ratchets (6) which cooperate with the syringe piston (2) or the piston rod (3), and which blocks the piston against being retracted after the sole injection is made, so that the syringe needle (4) becomes retracted into the inner of the syringe cylinder (1) upon withdrawal of the piston (2) after the injection has taken place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.