Rotating valve

Details Rotating valve Rotating valve

2007-05-08

2007-05-08

Fox, John (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C073S061550

Reexamination Certificate

active

10551751

ABSTRACT:
The rotating valve for high performance liquid chromatography (HPLC) has a stator with connections for the solvent reservoirs, pumps, chromatography columns etc. and a disc-shaped rotor with connecting grooves on the front face for selectively connecting different connections to one another. Said grooves are evenly distributed on two concentrical circles. The connecting grooves on the front face of the rotor are configured in the form of circular segments and are arranged in such a way that fife connections are simultaneously connected to one another in defined positions of the rotor in each circle.

REFERENCES:
patent: 3477207 (1969-11-01), Auger
patent: 4625569 (1986-12-01), Toei et al.
patent: 5010921 (1991-04-01), Nohl
patent: 6672336 (2004-01-01), Nichols
patent: 6874354 (2005-04-01), Cueni et al.
patent: 6997213 (2006-02-01), Towler et al.
patent: 62-56858 (1987-03-01), None
patent: WO 02/12878 (2002-02-01), None

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