Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2005-06-14
2005-06-14
Fox, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C137S625110
Reexamination Certificate
active
06904936
ABSTRACT:
The present invention describes a rotary valve for simultaneously diverting a plurality of liquid streams among a plurality of liquid receivers in a sequential and cyclic manner. Said rotary valve comprises: (1) a stator of barrel shape having a circular cavity, a bottom, a lateral structure, a group of first ports being spaced longitudinally along the lateral structure, and a group of second ports being evenly spaced apart on the bottom around the axis of the stator at the same distance from said axis, the number of the second ports being n multiple of that of the first ports wherein n is an integer of 1 or larger; (2) a rotor constructed by a hollow shaft section and a core section within said hollow shaft section, said hollow shaft section having a lateral structure accommodating a plurality of top openings that are longitudinally spaced apart and a bottom end accommodating a plurality of bottom openings that are evenly spaced apart around the axis of the hollow shaft at the same distance from said axis as the distance of the second ports from the axis of the stator, said core structure accommodating a plurality of flow passages that connect the top openings to the corresponding bottom openings; (3) the rotor being assembled in the circular cavity of the stator and a plurality of ring structures being sandwiched in-between the lateral exterior surface of the hollow shaft section of the rotor and the interior surface of said circular cavity and being longitudinally spaced apart, two adjacent ring structures forming one circular groove that is in fluid communication with a corresponding first port of the stator and a corresponding top opening of the rotor, the rotor being rotatable about the axis of said circular cavity, the junction between the exterior surface of the bottom end of the rotor and the interior surface of the bottom of the circular cavity of the stator forming a leak-proof contact with an exception of the bottom openings of the rotor which are in fluid communication with the corresponding second ports of the stator when a stepwise rotation of the rotor is properly indexed, each flow passage constantly being fluidly communicated with a corresponding first port, a top opening, and a bottom opening to form a constant flow path that contains the same fluid regardless of rotation, each second port of the stator receiving a different fluid when the second port is switched away from the currently engaged bottom opening to the adjacent bottom opening by a stepwise rotation, simultaneous diversion of multiple fluids being thus realized.
REFERENCES:
patent: 2985589 (1961-05-01), Broughton et al.
patent: 3192954 (1965-07-01), Gerhold
patent: 3706812 (1972-12-01), Rosset et al.
patent: 3814129 (1974-06-01), Cioffi
patent: 4068528 (1978-01-01), Gundelfinger et al.
patent: 4263937 (1981-04-01), Rudenko
patent: 5105851 (1992-04-01), Fogelman
Valco Instruments Co. Inc. Catolog. 1995 p. 170-180 (Copies Attached).
Archidex
Fox John
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