Automatic injector
US5756905A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1997 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Mar 24, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automatic injector is used for introducing a specimen into a specimen analyzing device, such as a gas chromatograph or a liquid chromatograph. The automatic injector is formed of a syringe having a needle at one end and a plunger slidably operationally situated inside the syringe for sucking and injecting the specimen through the needle, a syringe supporting member fixed to the syringe for supporting the same and having a sliding guide, and a needle guide. The needle guide includes a vertical plate portion having a groove for slidably engaging the sliding guide, and a horizontal plate portion fixed to the vertical plate portion and having a needle protection with a hole. A tip of the needle is positioned in the hole to prevent the needle from being bent when the needle is moved downwardly. The automatic injector is driven with a small torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.