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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5880480 B1

PDFFull Text
Date of Patent:
Mar. 09, 1999

Filed:

Mar. 13, 1997

Optical liquid level sensor including built-in test circuitry

Applicant:
Inventors:

Sylvester M Ellinger, Charlotte, VT (US);

Ralph E Burt, Vergennes, VT (US);

Jerre G Longfellow, Vergennes, VT (US);

Robert D LaClair, Richmond, VT (US);

Assignee:

Simmonds Precision Products, Inc., Richfield, OH (US);

Attorneys:

Romanchik; Richard A.

Zitelli; William E.

Primary Examiner:

Stephone Allen

Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250577 ; 73293 ; 250903 ; 340619 ; 356137 ;
Abstract

A liquid sensing apparatus for a fuel tank comprises a first optical sensor for producing an output having a first state that corresponds to the first optical sensor being exposed to air and a second state that corresponds to the first optical sensor being exposed to fuel; and a circuit for detecting the first and second optical sensor output states. The sensor circuit also has self test capability for testing both active and passive components. The sensor circuits can be accessed using a two wire only interface, and thermal stability can be achieved with the electronic circuit as shown.

Find Patent Forward Citations

Ellinger, Sylvester. (1999). Optical liquid level sensor including built-in test circuitry (U.S. Patent No. 5880480). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5880480

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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