Device for separating the connecting end of a hypodermic needle from the tip of an injection instrument
US6889830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | May 7, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/3205
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The connecting end of the hypodermic needle is so designed that it can be attached to and then disconnected from the tip of an injection instrument by pressure, that is, an axial tractional force exerted between the said needle and the said injection instrument. The extraction device has an opening delimited by locking elements forming one piece with elastic pieces so as to allow its diameter to vary between a minimum diameter and a maximum diameter at least equal to the diameter of the said connecting end and at least one piece associated with the said locking elements for the purpose of converting an axial force exerted on the said piece into at least one radial component capable of being applied to the said elastic pieces so as to deform them radially in order to increase the diameter of the said opening when axial pressure is exerted by the said connecting end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.