Pipette device
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United States of America Patent
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-
Apr 30, 1996
Issued Date -
N/A
app pub date -
Dec 16, 1992
filing date -
May 4, 1990
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A pipette device, comprising a housing, an actuating element projecting from the upper end of this housing, a cylinder, a hollow piston moveable in this cylinder for displacing an air volume, a rod connecting this piston to this actuating element which is depressed against spring force to displace this piston, and an adapter cone for receiving replaceable pipette tips communicating with this cylinder. According to the invention the hollow piston comprises an outer tubular shell and an inner support which is preferably made of plastic material and to which the actuating element is connected by a coupling. The invention particularly refers to providing a variety of shells made of different materials which can be easily replaced.
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