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:
Jun. 12, 2001
Filed:
Aug. 28, 1998
John Matthews, Cumming, GA (US);
Ashley Tillotson, Cumming, GA (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
A closed loop calibrator and process for calibrating a liquid metering device in a closed atmosphere such that the liquid being metered is not exposed to the atmosphere. In one embodiment, a calibrator is disclosed which comprises a body member containing a calibration chamber, and first and second fluid passage within the body member in spaced relationship to the calibration chamber, where when the first fluid passage is connected to a device to be calibrated and the second fluid passage is connected to a container, a closed system is formed having no exposed passages to the atmosphere. Additionally, the first fluid passage is in fluid communication with a lower end of the calibration chamber, and both the first and the second fluid passage are in fluid communication with an upper end of the calibration chamber.