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:
Aug. 23, 1988
Filed:
Jul. 27, 1987
Applicant:
Inventors:
Robert Urman, Schaumberg, IL (US);
Alfred G Brisson, Kildeer, IL (US);
Christopher Nowacki, Arlington Heights, IL (US);
Assignee:
Trutek Research, Inc., Lake Zurich, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ; G01L / ;
U.S. Cl.
CPC ...
128725 ; 7386103 ; 73708 ; 364571 ;
Abstract
A drift compensating circuit cooperates with an air-pressure-to voltage transducer. The first input of a comparison circuit is connected to the transducer, while a reference voltage is connected to the second input. The reference voltage is provided by an up/down counter and a digital to analog converter. The comparison circuit has an output connected to the up/down counter to cause the counter to count up or down. The counter is enabled at predetermined intervals.