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US 4,430,010 AGranted
Thermal method of testing liquids from a nozzle
AssigneeRobert Bosch GmbH
InventorsChristian Zrenner, Peter Kalberer
Life of this patent
Estimating the term…
Abstract
Liquids flowing from a nozzle or the like are tested by providing a sensing element having a heated tip part, directing a liquid to be tested to the tip of the sensing element so that the liquid cools the tip part and thereby an electrical signal is produced, and the thus produced electrical signal is utilized for evaluating the liquid and the nozzle.
Claims12
A method of testing a liquid flowing from a nozzle having a mouth, or the like, comprising the steps of
- providing a plurality of sensing elements having tips and located so that the sensing elements with the tips are arranged at a distance from the mouth and at a circle in a ring-like element and transverse to a stream of liquid flow from the mouth and to be tested, said flow stream passing through the ring-like element without moistening said tips;
- heating the tips of the sensing elements;
- directing the stream of liquid to be tested on the ring-like element and near the heated tips of the sensing elements, so that when a malfunction occurs in the nozzle, said flow stream widens and the liquid cools the heated tips and thereby an electrical signal is produced;
- and
- using the thus produced electrical signal for evaluating the liquid.
2 more elements
A device for testing a liquid flowing from a nozzle having a mouth, or the like, comprising
- a plurality of sensing elements having tips and located so that said sensing elements with said tips are arranged at a distance from the mouth and at a circle in a ring-like element and transverse to a stream of liquid to flow from the mouth and to be tested, said flow stream passing through the ring-like element without moistening said tips;
- heating means for heating said tips of said sensing elements, so that when a malfunction in the nozzle occurs, said flow stream widens and is directed onto the heated tips of the sensing elements the liquid cools the tips and thereby an electrical signal is produced;
- and
- means for using the thus produced electrical signal for evaluating the liquid.
1 more element
Dependencies are inferred from the claim text.