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. 08, 1980
Filed:
Sep. 13, 1978
Edwin K Clardy, Bartlesville, OK (US);
Buell O Ayers, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A method and apparatus is disclosed for providing a very reproducible chromatographic analyzer output by reducing variations in the chromatographic analyzer output due to changes in barometric pressure. An absolute back pressure regulator is utilized to provide a reference pressure for the chromatographic analyzer system. The reference pressure is not affected by changes in barometric pressure and thus the chromatographic output is not affected by changes in barometric pressure. Method and apparatus is also disclosed for reducing noise in a chromatographic analyzer system caused by pressure variations due to the switching of the chromatographic analyzer sample valve. A pneumatic accumulator is utilized to smooth small pressure surges resulting from actuation of the chromatographic analyzer sample valve and thus provides a smoother and more reproducible chromatographic analyzer output signal.