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US 7,118,351 B2Granted
Micropump with heating elements for a pulsed operation
AssigneeRoche Diagnostics Operations, Inc.
InventorsCarlo Effenhauser, Herbert Harttig, Tony Ziegler
Life of this patent
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Abstract
The invention discloses a micropump having heating elements in which an essentially pulsed operation of the heating elements occurs by means of a control unit. The pulsed operation of the heating elements enables an exact control of the flow rate. With the aid of the control unit it is possible to keep the flow rate constant over a long period of days or to change the flow rate rapidly and precisely.
Claims19
Micropump with a heating element comprising
- a fluidic transport element which can be connected to a liquid reservoir and in the connected state makes a fluidic connection between the liquid reservoir and an evaporation area,
- a heating element which is located in an end area of the transport element,
- a control unit for controlling the healing element,
- wherein the control unit controls the heating element by signals in such a manner that the heating element is alternately in a resting phase for a period T1 and in a heating phase for a period T2 and the resting phase and the heating phase alternate essentially periodically resulting in a pulsed operation of the heating element.
1 more element
Dependencies are inferred from the claim text.