Needle assembly for introducing a carrier gas into a sample vess

Details Needle assembly for introducing a carrier gas into a sample vess Needle assembly for introducing a carrier gas into a sample vess

1983-11-21

1985-12-17

Chiesa, Richard L.

Measuring and testing

Sampler, sample handling, etc.

Capture device

7386424, 7386481, 7386485, G01N 3506

Patent

active

045586039

ABSTRACT:
A needle is movable by a servomotor between a position of rest and an operating position in a stationary housing. The needle includes a tip and a first lateral opening close to the tip and a second lateral opening spaced therefrom. A longitudinal passage of the housing through which the needle is guided includes a pair of seals at the lower end and a seal at the upper end. A carrier gas conduit ends in the longitudinal passage axially inwards of the seals. A port communicating with atmosphere ends axially inwards of the upper seal. The arrangement permits a sample extraction from sample vessels closed by a membrane without the sample vessels having to be lifted and pressed against the needle.

REFERENCES:
patent: 3545279 (1970-12-01), Jentzsch et al.
patent: 3730002 (1973-05-01), Penton
patent: 3754443 (1973-08-01), Harris, Sr. et al.
patent: 3885438 (1975-05-01), Harris, Sr. et al.
patent: 4094195 (1978-06-01), Friswell et al.
patent: 4094196 (1978-06-01), Friswell
patent: 4117727 (1978-10-01), Friswell et al.
patent: 4199988 (1980-04-01), Riegger
patent: 4237733 (1980-12-01), Kolb et al.
patent: 4294126 (1981-10-01), Tomoff et al.
patent: 4464940 (1984-08-01), Pospisil

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