Accurate dose control mechanisms and drug delivery syringes
US9345839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2012 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Aug 23, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dose control mechanism for a syringe includes a plunger having a coarse pitch screw on its exterior surface, a housing having a corresponding coarse pitch guide along the interior surface of the housing, a screw having a fine pitch screw which interfaces with a fine pitch nut of an adapter, wherein the plunger has an internal annular space within which screw at least partially resides. An accurate dose drug delivery syringe includes such a dose control mechanism, a barrel, a plunger seal, and a barrel adapter assembly having a barrel tip and a needle. The syringe may be a fill-at-time-of-use syringe, a pre-filled syringe, or a safety syringe having integrated needle retraction or needle sheathing safety features, or a combination thereof. Methods of assembly, manufacturing, and operation are similarly disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.