Syringe needle sheath
US4911694A · kind A · utility
Inventor
Key dates
| Filing date | May 6, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | May 6, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3247
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe needle assembly including a needle having at least one point for use in a syringe assembly, including a needle shaft with at least one point at one end for entering the patient and one end for engaging the syringe, and a puncture-proof sheath surrounding a major portion of the needle shaft and normally extending substantially the entire length of the shaft while leaving said needle point exposed, the sheath including at least one radially expanded inner portion joined by a portion attached to said shaft, the radially expanded portion being axially compressible to force the sheath to slide in the direction of said point along said shaft to extend beyond and non-retractably cover said point. The present invention is specifically adapted to sheath a single pointed or double pointed needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.