Dental syringe
US4581022A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1983 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Nov 1, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/341
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A precision injection system for intralignmental anesthesia and the like having a syringe with a tubular handle portion which is removably connected a tubular headpiece as a longitudinal extension thereof. The headpiece receives a carpule cartridge with injection contents monitored during injections through elongate windows on opposite sides of the headpiece. A dosing plunger housed in the handle portion in a retracted start position is activated by a servo-dosing lever and advances incrementally axially into the headpiece for delivery of metered quantities of the contents of the carpule cartridge each time the servo-dosing lever is actuated. Provision is made for semiautomatic resetting of the dosing plunger to a retracted start position by depressing a resetting key and raising the syringe to a generally vertically raised position. The dosing plunger has a rack thereon activated by a ratchet cooperative with the servo-dosing lever so that a reduction in the normal pressure applied to the servo-dosing lever is effected in making the injections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.