Patent ID: 8210830
Filing Date: 2012-07-03
Classification: F04B

Abstract:
1. A valveless micropump comprising a flow channel, which further comprises a first-diffuser shaped channel; wherein said first diffuser-shaped channel has a first cross section on an entry side of a diffuser stream and a second cross section on an exit side of the diffuser stream, wherein said first cross section is smaller than said second cross section; wherein the first diffuser-shaped channel has a diffuser angle ranging from 10 degrees to 90 degrees; wherein said flow channel additionally has a second channel that is connected to the first cross section on the entry side of the diffuser stream of the first diffuser shaped channel; wherein said valveless micropump further comprises a volumetrically variable chamber with an oscillation activator which communicates with the flow channel through a communication path that is normal to the flow channel, wherein energization of the oscillation activator generates a net stream of fluid in the flow channel; wherein a cross section of the second channel at a connection with the communication path is the same as its cross section at a connection with the first cross section on the entry side of the diffuser stream of the first diffuser shaped channel.