Pipetter device

Details Pipetter device Pipetter device

1989-10-04

1992-04-14

Lacey, David L.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

7386402, 7386413, 7386414, B01L 302

Patent

active

051046253

ABSTRACT:
A pipetter for picking up, holding and then ejecting a pipet tube, without touching the pipet tube with the hands, which includes a housing, a collet which comprises fingers mounted at the forward end of the housing, and an outer or holding sleeve which closes the fingers when the outer sleeve is positioned forwardly on the housing and which allows the fingers to open when the outer sleeve is retracted on the housing, and an ejector sleeve which has a spring that pushes it against the fingers to open them and eject the tube. The outer sleeve has a holding spring mounted between the housing and the outer sleeve, and the outer sleeve holding spring urges the outer sleeve forwardly to push against the outer surface of the fingers to close them and hold them closed, when the ejector sleeve is pushed into a retracted position in the housing by a pipet tube. When the operator wishes to eject the tube from the pipetter after collecting and discharging its blood sample, he retracts the outer sleeve against the force of the outer sleeve spring, and the ejector spring house moves the ejector sleeve forwardly between the pipetter fingers to open the fingers and to eject the pipet tube.

REFERENCES:
patent: 338611 (1886-03-01), Pusey
patent: 2959964 (1960-11-01), Streitfeld
patent: 3918308 (1975-11-01), Reed
patent: 4084730 (1978-04-01), Franke et al.
patent: 4099548 (1978-07-01), Sturm et al.
patent: 4154108 (1979-05-01), Volliger et al.
patent: 4362063 (1982-12-01), d'Autry
patent: 4474071 (1984-10-01), d'Autry
patent: 4567780 (1986-02-01), Oppenlander et al.
patent: 4616514 (1986-10-01), Magnussen, Jr. et al.
patent: 4784834 (1988-11-01), Hirschmann

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