Injection device
US10486178B2 · kind B2 · utility
0Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 2017 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Sep 4, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2205/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An injection device able to evacuate air bubbles trapped with injectable liquid includes a needle tube, a push rod slidable installed in the needle tube and a piston secured on one end of the push rod. The piston includes a main body and a cover, the main body defines a through hole and an exhaust passage in air communication with the through hole. The cover is secured on the main body to shield the through hole and the exhaust passage, and the cover defines an exhaust hole in air communication with one end of the exhaust passage to allow gas but not the liquid to escape from under the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.