Measuring and testing – Liquid level or depth gauge
Reexamination Certificate
2006-08-08
2006-08-08
Williams, Hezron (Department: 2856)
Measuring and testing
Liquid level or depth gauge
C347S007000, C347S068000
Reexamination Certificate
active
07086281
ABSTRACT:
A detector of liquid consumption condition includes first and second vibrating parts that can vibrate relatively to a containing space that can be filled and refilled with a liquid. At least a portion of the first and second vibrating parts are exposed to the containing space. Each of the vibrating parts are caused to vibrate by piezoelectric devices based on a driving signal and can generate a counter electromotive force signal by a vibration of the vibrating parts. A liquid consumption condition detecting part can detect a liquid consumption condition, based on the counter electromotive force signal from at least one of the piezoelectric devices. The containing space can contains a predetermined volume of the liquid, and the first vibrating part is placed near a surface of the liquid at a first level, and the second part is placed near a surface of the liquid at a second level.
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patent: 2000-43287 (2
Kanaya Munehide
Tsukada Kenji
Miller Rose M.
Seiko Epson Corporation
Sughrue & Mion, PLLC
Williams Hezron
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