Single-use disposable syringe
US4955871A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1989 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Jun 1, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/50
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A single-use disposable syringe. In the syringe, a reservoir is formed of two sheets of thermoplastic material having expanded central portions that form a pair of convex domes. Both of the domes are compressible, and a connecting member spaces apart the domes. In response to complete compression of both of the central portions together, the reservoir substantially collapses and each of the domes becomes concave to prevent the reservoir from being reformed and to prevent reuse of the syringe. After partial compression of both of the central portions together and partial collapse of the reservoir, the central portions expand to reform the reservoir and draw fluid into the reservoir, thereby aspirating a hypodermic needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.