Liquid sensing apparatus for a liquid container for...

Details Liquid sensing apparatus for a liquid container for... Liquid sensing apparatus for a liquid container for...

2005-11-15

2008-09-16

Williams, Hezron E. (Department: 2856)

Measuring and testing

Liquid level or depth gauge

C073S316000

Reexamination Certificate

active

07424824

ABSTRACT:
A liquid sensing apparatus includes a liquid sensing chamber33having a liquid inlet port that is in communication with an external liquid container in which a liquid is reserved, and a liquid outlet port that is in communication with a liquid consuming apparatus, a movable member34movable depending on a liquid level in the liquid sensing chamber33, a recess portion33b, 41afor cooperating with a wall surface of the movable member34to form a closed space when the movable member34is moved to a predetermined position depending the liquid level, and a piezoelectric sensing means40for applying a vibration to the recess portion and sensing a state of a free vibration following upon the vibration.

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Search Report from British Patent Appln. 0523278.0, dated Mar. 23, 2006.

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