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.:
Date of Patent:
Apr. 27, 1993
Filed:
Sep. 23, 1991
Applicant:
Inventor:
Roni K Doak, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ; G01F / ;
U.S. Cl.
CPC ...
73295 ; 33731 ; 3404503 ; 340622 ;
Abstract
The interface gauge includes at least one transducer for sensing the interface between two media within a reservoir. An elongated flat member has at least one transverse bore. A transducer is loosely contained within the bore. Conductors connect the transducer to a signal comparator and logic network for monitoring an impedance change in the transducer in response to a change in the interface within the reservoir. The gauge can replace conventional mechanical dipsticks in factory made dipstick tubes for crankcases and automatic transmissions in order to monitor oil and transmission fluid levels.