Apparatus including a sample petter tube for obtaining reproduci

Details Apparatus including a sample petter tube for obtaining reproduci Apparatus including a sample petter tube for obtaining reproduci

1990-01-26

1992-01-28

Hill, Jr., Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

7386401, 7386411, 7386414, 422102, 422103, 436180, G01N 114

Patent

active

050842412

ABSTRACT:
The disclosure teaches a pipette or petter tube and a system using the pipette to obtain reproducible liquid samples of known small volume. The pipette has an elongate body with one end adapted to be removably engaged by an aspiration device and the other end which is closed is adapted to contact a surface. The body has a spherical portion proximate the closed end. At least one aperture penetrates the wall of the spherical portion. When the petter tube is used in conjunction with a hollow tube having a known volume and of such size that the closed end of the pipette contacts the bottom of the tube a quantity of liquid can be aspirated from the tube leaving only a small predetermined volume behind.

REFERENCES:
patent: 2667075 (1954-01-01), Blum et al.
patent: 3321087 (1967-05-01), Fuge et al.
patent: 3937370 (1976-02-01), Witty
patent: 4022576 (1977-05-01), Parker
patent: 4308028 (1981-12-01), Elkins

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