Liquid chromatograph pump and control method therefor

Details Liquid chromatograph pump and control method therefor Liquid chromatograph pump and control method therefor

2005-08-02

2005-08-02

Therkorn, Ernest G. (Department: 1723)

Liquid purification or separation

Processes

Chromatography

C210S101000, C210S198200, C417S053000

Reexamination Certificate

active

06923916

ABSTRACT:
In a pump for feeding a liquid for chromatography, first and second plungers form first and second volumes respectively together with first and second chambers, the first plunger is prevented from changing the first volume sufficiently for feeding the liquid between the first and second volumes when the second plunger decreases the second volume to discharge the fluid from the second volume to an outlet path of the pump for the chromatography.

REFERENCES:
patent: 4233156 (1980-11-01), Tsukada
patent: 4752385 (1988-06-01), Wilson
patent: 4980059 (1990-12-01), Barlow et al.
patent: 5637208 (1997-06-01), Dourdeville
patent: 5653876 (1997-08-01), Funke
patent: 5852231 (1998-12-01), Kaji
patent: 5897781 (1999-04-01), Dourdeville
patent: 6099724 (2000-08-01), Dourdeville
patent: U-63-36668 (1988-03-01), None
PTO Translation 2005-036668, pp. 1-3, Oct. 5, 2004.

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