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:
May. 15, 1984
Filed:
Feb. 28, 1983
Akira Nakamoto, Takatsuki, JP;
Katsuhiko Saito, Otsu, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
A liquid chromatograph comprising a reciprocating single plunger pump having a pair of check valves; a solvent supply passage, from the outlet check valve of the pump to a column; a driver means for the plunger of the pump; a control means for controlling the velocity of the plunger; the control means comprising a pressure detecting means disposed in the solvent supply passage, a memory means for storing a pressure signal obtained from the detecting means at a predetermined point between the initiation and termination of the suction, and a comparator means for comparing the stored pressure signal with a signal indicating a pressure which is derived from the pressure detecting means; the signal produced from the comparator means allowing the velocity at which the plunger is moved for delivery from the initiation of delivery stroke until the outlet pressure of the pump reaches the pressure at the predetermined point to be controlled so that it is greater than a velocity of the plunger set for the subsequent movement for delivery.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile