Constant force syringe
US9101713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Mar 12, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2202/0007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Various syringe systems are disclosed. One such syringe system may include a body having a hollow lumen and a distal end, a vacuum chamber disposed within the hollow lumen of the syringe body, a first plunger connected to a distal portion of the vacuum chamber, the first plunger forming a first seal against an inner surface of the syringe body and defining a fluid delivery volume between the first plunger and the distal end of the syringe body, a second plunger disposed within the vacuum chamber, the second plunger forming a second seal against an inner surface of the vacuum chamber and defining a proximal and distal volume compartments within the vacuum chamber, and a piston affixed to the second plunger, the piston configured to move the second plunger within the vacuum chamber, thereby altering a volume of the proximal volume compartment and a volume of the distal volume compartment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.