Hypodermic anesthetic injection apparatus and method
US5180371A · kind A · utility
77Cited by
15References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1991 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Feb 8, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2202/048
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An aspirating hypodermic syringe and method for injecting dental anesthetic in which anesthetic flow through the needle is established independently of the fingers of the operator and in which different rates of flow are provided, including positive flow while the needle is entering the tissue. Effective aspiration in syringes which use expendable anesthetic vials is assured by means of a yieldable resistance member in the syringe which holds the vial with sufficient force to enable the syringe plunger to lock positively onto the piston of the vial.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.