Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1979-04-25
1983-01-25
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
Capture device
B01L 302
Patent
active
043696651
ABSTRACT:
An automatic pipette is described which can be manually held yet provides a highly accurate instrument capable of precise handling of very small liquid samples. A main housing is provided sized to be conveniently held in the hand of an operator. The housing encloses a displacement mechanism of a size selected to provide a highly accurate handling of small liquid samples as well as a motor drive, control circuit and a power source. The control circuit provides a precise control over rate of intake and dispense and is selected to reduce power demand while maintaining safety features to simplify operator manual control. A technique is described to enhance engagement between the pipette and a replaceable tip for low air leakage and attendant enhanced take-up accuracy, as well as provide an integral method for gentle tip removal after contamination. A dilution pipette is described to provide a highly accurate dilution of small liquid samples.
REFERENCES:
patent: 2925198 (1960-02-01), Healey
patent: 3175734 (1965-03-01), Heiss
patent: 3395704 (1968-08-01), Frey et al.
patent: 3719087 (1973-03-01), Thiers
patent: 3827305 (1974-08-01), Gilson et al.
patent: 3853012 (1974-12-01), Scordato
patent: 3915651 (1975-10-01), Nishi
patent: 3918308 (1975-11-01), Reed
Indicon Inc.
Swisher S. Clement
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