Medical injector with rotatable body portions
US8323238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2009 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Sep 18, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/2073
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medical injector is provided herein which includes first and second body portions rotatably coupled together; a displaceable plunger disposed in at least one of the first and second body portions; a spring disposed to advance the plunger; and, a releasable retainer for retaining the plunger in a first portion against force of the spring. The releasable retainer releases the plunger upon a predetermined extent of relative rotation between the first and second body portions, thus allowing the spring to advance the plunger. Advantageously, the subject invention provides a medical injector having an automated plunger drive which is triggered upon rotation of injector body portions, thereby minimizing premature or failed activations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.