Needleless hypodermic injection device
US5064413A · kind A · utility
733Cited by
24References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1989 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Nov 9, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/583
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A needleless injection device has a housing containing a pilot valve connectable to a compressed gas source. A main valve is operatively connected to the pilot valve. The pilot valve and main valve form a two-stage valve with the pilot valve activatable to open the main valve utilizing gas pressure. Compressed gas in a reservoir flows through the open main valve to driven a plunger into an ampule to inject an injectant through a patient's skin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.