Extendable plunger rod for medical syringe
US9220843B2 · kind B2 · utility
5Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2013 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Sep 17, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31518
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medical syringe with an extendible plunger rod is provided which facilitates injection of a large volume of material, for example, a dermal filler. The rod may include an outer plunger rod, an inner plunger rod, a compression spring configured to exert force tending to push the inner plunger rod in a direction distal to the outer plunger rod, and a locking mechanism. The locking mechanism prevents movement of the inner plunger rod relative to the outer plunger rod while both the inner and outer plunger rods are depressed, until the outer plunger rod has been depressed a first predetermined distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.