Syringe with plunger reaction pressure reduction structure
US11752270B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2021 |
| Grant date | Sep 12, 2023 |
| Priority date | — |
| Expiry date | Apr 3, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/31523
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe with plunger reaction pressure reduction structure is proposed. The syringe includes: a barrel including a finger grip at a rear end thereof and a Luer-lock connector in which a thread portion is formed on an inner surface outside a tapered tube of a front discharge end thereof; a plunger rod configured to be inserted in an inside of the barrel and including a push end at a rear end thereof; a plunger coupled to a front end of the plunger rod; and a needle hub configured to be screwed with the Luer-lock connector and including an injection needle mounted to a front end thereof. The syringe is configured to have a three-step structure at the plunger in which intervals between steps are gradually shortened, so that the reaction pressure applied to the plunger is distributed and the injection is easily performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.