Piston for material delivery system
US8840592B2 · kind B2 · utility
0Cited by
9References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2008 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Sep 6, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31598
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A piston configured to be received within a syringe is disclosed. The piston includes a valve body defining a proximal end and a distal end, a filter disposed within the proximal end of the valve body, and a valve disk disposed within the distal end of the valve body. As the piston is advanced through the syringe, the valve disk is configured to provide fluid flow through the valve body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.