Needle assemblies
US5941853A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Jul 31, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/0007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A spinal-epidural needle assembly has a rearwardly-extending sleeve on the epidural needle that is rotatable to a limited extent on its hub and that has a series of circumferentially-extending ribs on its outer surface. The spinal needle has a collar extending forwardly from its hub and slidable along outside of the sleeve of the epidural needle. The collar has a small elastomeric pad on its inner surface, which is slidable along a smooth region to one side of the ribbed region. The spinal needle is locked longitudinally relative to the epidural needle by twisting its collar so that the elastomeric pad slides laterally over the ribbed region with the ribs gripping into the pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.