Foot switch with a housing and method for checking the tightness of a housing
AssigneeSteute Technologies GmbH & Co. KG
InventorsChristof GERHARDY, Marc SCHMIDT
Life of this patent
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Abstract
A housing with an internal volume is leak tested by changing an internal pressure in the internal volume of the housing and determining a first internal pressure and a first temperature. A second internal pressure and a second temperature are determined. It is then determined whether an absolute value of a difference between the second internal pressure and the first internal pressure, considering a difference between the first and second temperatures, is above a threshold value. A signal representing the result of the previous step is output.
Claims12
1-11. (canceled)
A method for leak testing a housing, wherein the housing has an at internal volume that is at least partially air-filled, the method comprising:
- changing an internal pressure in the internal volume of the housing;
- determining a first internal pressure and a first temperature;
- determining a second internal pressure and a second temperature;
- determining whether an absolute value of a difference between the second internal pressure and the first internal pressure, accounting for a difference between the first and second temperatures, is above a threshold value;
- and
- outputting a signal representing whether or not the absolute value of the different between the second internal pressure and the first internal pressure is above the threshold value.
A foot switch comprising:
- a sealed housing with an inner volume that is at least partially air-filled;
- at least one button or a pedal, wherein the at least one button or the pedal is configured so that actuation of the at least one button or the pedal changes the inner volume of the housing;
- at least one pressure sensor configured to measure a pressure in the inner volume;
- a temperature sensor;
- and
- an evaluation unit configured, when the internal pressure in the internal volume of the housing is changed by actuation of the at least one button or the pedal, to
- determine a first internal pressure and a first temperature;
- determine a second internal pressure and a second temperature;
- determine whether an absolute value of a difference between the second internal pressure and the first internal pressure, accounting for a difference between the first and second temperatures, is above a threshold value;
- and
- output a signal representing whether or not the absolute value of the different between the second internal pressure and the first internal pressure is above the threshold value.
Dependencies are inferred from the claim text.