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US 7,709,268 B1Granted
Sampling/dispensing device with plunger and housing set onto plunger
AssigneeTTP Labtech Limited
InventorsThomas Richard Kerby Edwards, John Cassells, Nicholas Ian Mounteney, Gerald Avison
Life of this patent
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Abstract
A positive displacement type substance sampling and dispensing device comprises a central plunger formed from a first material. A plunger housing is formed from a second material having a melting point lower than the first material, the housing being formed by molding and setting the second material on to the surface of the plunger so that the plunger can slide in the housing to draw a substance into it.
Claims12
A method, comprising:
- making a plunger type pipette, by molding and setting a second material around a central plunger having an outer surface and being formed of a first drawn material, such that the second material forms a barrel corresponding to the outer surface of the plunger, and the central plunger can slide in the barrel to draw a substance into it and/or to dispense a substance from it;
- and
- aspirating a substance into the plunger type pipette by drawing the plunger into the barrel.
Dependencies are inferred from the claim text.