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:
Jul. 11, 1995
Filed:
May. 31, 1994
Robert C Henderson, Avondale, PA (US);
W Dale Snyder, West Chester, PA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
Chromatographic system includes a split/splitless injection port operatively connected to an inlet line for receiving the regulated carrier gas flow, a separation column for receiving at least a portion of the mixture as a column flow, and a split vent line and a septum purge line for outputting respectively a split flow and a septum purge flow. A forward device driver operatively connected to a respective fluid controller controls fluid flow in the inlet line and a back device driver operatively connected to a respective fluid controller controls fluid pressure in the split line. A setpoint controller provides first and second setpoint control output values to a configuration module, which selectably configures the provision of each of the first and second setpoint control output values to a selected one of the forward and back device drivers according to the selection of a split or splitless injection mode.