Patent ID: 7740472
Filing Date: 2010-06-22
Classification: B01J,B01L,B05C,C40B,Y10T

Abstract:
1. A device for flowing a liquid on a surface, the device comprising: a flow path; a first port at a first end of the flow path for supplying the liquid to the flow path and for applying a first port pressure for retaining the liquid when the flow path is remote from the surface; a second port at a second end of the flow path for receiving the liquid from the flow path and for applying a second port pressure such that the difference in pressure between the first and second port is oriented to promote flow of the liquid from the first port to the second port via the flow path in response to the flow path being located proximal to the surface and the liquid in the device contacting the surface; and a protrusion adjacent to the first port and extending into the flow path for directing the liquid from the first port towards the surface, wherein the first and second port pressures being such that the liquid is drawn towards at least the second port in response to withdrawal of the flow path from the surface.