Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Transparent
Reexamination Certificate
2007-08-21
2007-08-21
Cecil, Terry K. (Department: 1723)
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Transparent
C210S542000, C175S049000, C073S864430
Reexamination Certificate
active
10886190
ABSTRACT:
An apparatus for sampling a filter layer and a method using the same are disclosed herein. The apparatus includes a cylindrical tube made of a transparent material; a screw installed at a central portion in the cylindrical tube, to be rotated for shifting a sample from the lower part to the upper part of the cylindrical tube, and a rotary operating unit fixed to the upper end of the screw for rotating the screw, wherein the cylindrical tube is provided with a scale formed on its outer circumference and a protective cap combined with the lower end for smoothly excavating the filter layer and preventing the damage of the cylindrical tube. The apparatus further lower case a fixed supporter on the upper end of the screw and a supporting hand lever protruding from one side of the fixed supporter to be pressed by a worker with force required for excavation.
REFERENCES:
patent: 4345484 (1982-08-01), Gould et al.
patent: 6253629 (2001-07-01), Lee et al.
patent: 2003/0082797 (2003-05-01), Rastorgoueff et al.
Choi Kyo-Nam
Jung Jin-Dal
Oh Byoung-Geun
Shin Oen-Ho
Cecil Terry K.
Korea Water Resources Corporation
Tuchman & Park LLC
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