Sampling valve including sample ejection means

Details Sampling valve including sample ejection means Sampling valve including sample ejection means

1986-05-12

1988-03-08

Strecker, Gerard R.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

324 714, G01N 2707

Patent

active

047301554

ABSTRACT:
A slide motion sampling valve for use with a particle study device and carrying an expansive type microsyringe having a minimum trapped volume. The sampling valve is formed of a slidably movable member carrying a trapping volume, an expansive element and ejection port in the form of a fine aperture, and a stationary element sealingly engaged with said movable member and carrying an opening leading to the entrance of the sheath flow arrangement. The valve operates between a conditon where the ejection port and the opening are aligned and a condition where communication to the entrance is blocked whereby to isolate the trapping volume from said entrance except during ejection of the predetermined amount. One embodiment described employs a linear sliding motion while another embodiment employs a rotating sliding motion.

REFERENCES:
patent: 3939409 (1976-02-01), Hogg
patent: 3958177 (1976-05-01), Reeves et al.
patent: 4471297 (1984-09-01), Berg

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