Pipette means

Details Pipette means Pipette means

1982-05-20

1984-07-10

Smith, William F.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

7386412, 7386411, 222207, 222214, B01L 302

Patent

active

044592671

ABSTRACT:
Pipette means having aspirating and expelling means and a substantially cylindrical tube connected to a pipette tip for fluid flow therebetween; the expelling means being arranged to apply pressure to the outer surface of the cylindrical tube, the diameter and wall thickness of which being chosen so that said tube is compressed elastically and substantially uniformly and circumferentially to reduce the internal volume thereof, tending to expel any liquid from the pipette tip; and the aspirating means being arranged to relieve pressure from the outer surface of said tube, allowing the tube to expand substantially circumferentially and uniformly so that liquid may thereby be drawn into the pipette tip.

REFERENCES:
patent: 2791969 (1957-05-01), Berliner
patent: 2810351 (1957-10-01), Bower
patent: 3007416 (1961-11-01), Childs
patent: 3367746 (1968-02-01), Maurukas
patent: 3476518 (1969-11-01), Jungner
patent: 3484207 (1969-12-01), Anthon
patent: 3525592 (1970-08-01), Buckley
patent: 3598508 (1971-07-01), Reid
patent: 3877609 (1975-04-01), Cullis
patent: 4030640 (1977-06-01), Citrin et al.
patent: 4334640 (1982-06-01), van Overbuggen et al.

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