Purging means for aperture of blood cell counter

Details Purging means for aperture of blood cell counter Purging means for aperture of blood cell counter

1977-11-18

1979-12-25

Schwadron, Martin P.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

134102, 134169C, 324 71CP, G01N 2700

Patent

active

041800915

ABSTRACT:
A system for purging the aperture and surrounding portions of a blood cell counter of dirt, debris, and previous sample liquid. A sample tube extends from a source of either sample liquid or cleansing solution to a small gap between the aperture and housing assembly. A purge line is connected between an annular portion surrounding the gap and a pump which supplies negative pressure. Due to the geometry of the sample tube, gap, annulus, and purge line, a high pressure drop occurs across the gap and the liquid flows at relatively high velocity past the aperture to facilitate cleaning.

REFERENCES:
patent: 3259891 (1966-07-01), Coulter et al.
patent: 3746976 (1973-07-01), Hogg
patent: 3783376 (1974-01-01), Doniguian
H. E. Kubitschek, Apertures for Coulter Counters, in Review of Scientific Instruments, vol. 35, No. 11, pp. 1598-1599, Nov. 1964.

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