Measuring and testing – Volume or rate of flow – By measuring thrust or drag forces
Reexamination Certificate
2007-06-19
2007-06-19
Thompson, Jewel (Department: 2855)
Measuring and testing
Volume or rate of flow
By measuring thrust or drag forces
Reexamination Certificate
active
10532558
ABSTRACT:
The invention relates to a device for monitoring an air supply flow or a volumetric air flow, in particular for ventilators which can also be applied for extremely low flow speeds and/or throughput rates. The aim of the invention is to produce a device cheaply and simply with essentially wear-free components which reacts to changes in the flow speed and/or the throughput rate without a time delay. Said aim is achieved, whereby the device comprises an approach flow device, the position of which may be altered relative to a mounting, against a retaining force FMand which may be impinged by the air flow for monitoring to generate a change in the position thereof. Furthermore, magnetic devices for the generation of a magnetic field dependent on the position of the approach flow device, detection means for recording the magnetic field and measuring means for generation of a measured signal dependent on the magnetic field are provided. The magnetic field forms at least a part of the retaining force FM.
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Marshall & Gerstein & Borun LLP
STEGO-Holding GmbH
Thompson Jewel
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