Unit dose low viscosity material dispensing system with easy loading
US6652494B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | May 11, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C17/01
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A syringe having a breech and a slot adjacent an ampule chamber adapted to receive the body and nozzle of a collapsible ampule. A syringe includes a forward ampule chamber having a predetermined longitudinal length for dispensing a relatively low viscosity material. A closed ampule containing a relatively low viscous material is collapsible and is easily positioned and held within the syringe during dispensing. The nozzle slot permits easy insertion of the flexible collapsible ampule and removal once the ampule is collapsed. In one embodiment, a syringe barrel has flexible fingers used in combination with a plunger having a reduced diameter intermediate portion for preventing the plunger from falling out of the barrel. Low viscosity materials in a unit dose collapsible ampule are controllably and conveniently dispensed for use in many different applications. The present invention is particularly suitable for dispensing dental materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.