Active safety pen needle assembly
US9649452B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2014 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Mar 18, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3254
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The subject invention provides a safety pen needle assembly which includes: a hub; a needle carrier; a needle fixed to the needle carrier; a shield; and, a first engageable locking arrangement for fixing the shield to the needle carrier. Upon a predetermined extent of distal movement of the shield relative to the hub, the first locking arrangement is engaged such that the shield becomes fixed to the needle carrier. Upon further distal movement of the shield relative to the hub beyond the predetermined extent of distal movement, the shield and the needle carrier move in concert together relative to the hub causing a proximal end of the needle to move distally relative to the hub to a retracted state. Advantageously, the subject invention provides a reliable, low-cost safety pen needle assembly which does not require a spring or other biasing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.