Quantitative liquid sampling instrument

Details Quantitative liquid sampling instrument Quantitative liquid sampling instrument

1991-12-02

1993-12-21

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

422 58, 422106, 422107, 436 54, 7386301, 250577, B01L 302

Patent

active

052719022

ABSTRACT:
A quantitative liquid sampling instrument comprises a main body of a pipet device which includes a pipet tip having an opening at its lower end for sucking and discharging a liquid. The pipet tip being in a shape of a tube shell having a cavity for holding a liquid sucked therein through the opening and being made of a transparent or semi-transparent material. The main body further comprising a device for applying a gas pressure for sucking or discharging the liquid to or from the inside of the cavity of the pipet tip. The instrument further comprising a liquid level detecting device installed under the main body of the pipet device; a vertical movement control device for moving the main body of the pipet device or a container of the liquid to make them relatively approach one another until a predetermined length of the lower end of the pipet tip is dipped into the liquid in the container; and a computing device for computing the end point of relative approaching movement of the main body of the pipet device and the container and for outputting a signal regarding the end point to the vertical movement control device.

REFERENCES:
patent: 2912858 (1959-11-01), Fuller
patent: 3314292 (1967-04-01), Schulte et al.
patent: 3683196 (1972-08-01), Obenhaus
patent: 4053002 (1977-10-01), Ludlow
patent: 4410020 (1983-10-01), Lorenz
patent: 4846003 (1989-07-01), Marquiss
patent: 4944922 (1990-07-01), Hayashi
patent: 5045286 (1991-09-01), Kitajima et al.

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