Patent ID: 11951961
Assignee: ZF ACTIVE SAFETY GMBH
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 14:
15. A testing method comprising the steps of:
providing a fluid reservoir including a guiding section and a projection extending from an inner surface of the fluid reservoir to a terminal end face;
providing a float having a first sensing element in the guiding section, the float having an engagement surface facing upward toward the terminal end face of the projection, the engagement surface directly contacting the terminal end face when a fluid level in the fluid reservoir is at a predetermined fluid level to maintain the float in the guiding section;
providing a negative pressure generator;
generating a negative pressure in a fluid passageway and a chamber which are in fluid communication with the guiding section wherein a second sensing element is affixed to the guiding section;
transferring a fluid flow stream generated via the negative pressure from the guiding section to the chamber via the fluid passageway, the fluid flow stream drawing the float having the first sensing element downward within the guiding chamber toward the fluid passageway so as to move the float having the first sensing element from an upper position to a lower position within the guiding section;
generating a signal via the first and second sensing elements as the float moves relative to the second sensing element within the guiding section; and
transmitting the signal to at least one of a control unit or a graphical user display.