Automatic injector

Details Automatic injector Automatic injector

1997-03-24

1998-05-26

Raevis, R.

Measuring and testing

Sampler, sample handling, etc.

Capture device

G01N 114

Patent

active

057569053

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.

REFERENCES:
patent: 3991627 (1976-11-01), Laird et al.
patent: 4499053 (1985-02-01), Jones
patent: 4621534 (1986-11-01), Munari et al.
patent: 4713974 (1987-12-01), Stone
patent: 4951512 (1990-08-01), Mazza et al.

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