Patent ID: 7246551
Filing Date: 2007-07-24
Classification: A61M,B01L,G01N

Abstract:
1. A liquid handling device comprising: a body with at least one channel, the channel having an end for receiving and expelling fluid; a needle in fluid communication with the end of the channel to aspirate and/or dispense a fluid sample on a work area; a plunger constructed and arranged for axial movement within the channel; a contact surface including a surface feature that forms a non-smooth surface; and a seal provided in the channel that sealingly engages a portion of the plunger with a portion of the body, the seal including a seal member mounted on the body, and at least a portion of the contact surface including the surface feature being located at the seal; wherein the plunger includes the contact surface for sealing engagement with the seal member, and movement of the plunger in the channel causes movement of the body relative to the plunger at the seal and causes fluid flow at the end of the channel that is effective to aspirate and/or dispense the fluid sample on the work area via the needle.