Safety syringe and method for using the same
US8622962B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2009 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Feb 23, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/582
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety syringe that effectively prevents the administration of an injection in excess of a maximum injection pressure, and that provides a clear, immediate tactile feedback to the practitioner each time a maximum injection pressure is exceeded. The practitioner is provided a predetermined number of attempts to inject fluid without exceeding the maximum injection pressure, each time receiving a direct tactile feedback in the form of a ratcheting click within the plunger assembly of the syringe. After a final attempt, the next over-pressure event causes a disconnect between the thumb plate of the syringe and the piston that engages the fluid within the syringe barrel, positively prevent a potentially harmful injection. In an illustrative embodiment, the plunger assembly includes a distal portion connected to the piston and a proximal portion, connected to the thumb plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.