Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Patent
1994-12-20
1997-01-14
Coe, Philip R.
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
7386422, 134170, B08B 900
Patent
active
055929591
ABSTRACT:
A washing apparatus includes a pipet-outer-wall washing member embedding a through-hole in which a pipet is loosely inserted, a supply path for supplying washing solution to the through-hole, and a discharge path for discharging waste liquid from the through-hole. It further includes a pipet-interior washing device which connects to the pipet. A washing solution storage chamber is connected to the supply path in the pipet-outer-wall washing member and to the pipet-interior washing device and a suction device is connected to the discharge path of the washing member. The sucking device is used for sucking-up waste liquid which exits the through-hole at a side wall thereof. A waste liquid storage chamber is connected to the discharge path. Finally, a drive device causes at least one of the washing member and the pipet to move relative to the other to vary the relative position of the washing member versus the pipet to thereby allow for washing of the entire pipet. Further, the through-hole includes a narrow diameter portion having a narrow clearance for the pipet and a wide diameter portion, formed below the narrow diameter portion, with a clearance for the pipet that is wider than that of the narrow diameter portion. Additionally, the supply path is linked to a side wall of the wide diameter portion, whereas the discharge path is linked to a side wall of the narrow diameter portion.
REFERENCES:
patent: 3552212 (1971-01-01), Ohlin
patent: 3719086 (1973-03-01), Bannister et al.
patent: 3748911 (1973-07-01), Rousselet et al.
patent: 3911749 (1975-10-01), Hendry
patent: 4495149 (1985-01-01), Iwata et al.
patent: 4574850 (1986-03-01), Davis
patent: 5408891 (1995-04-01), Barber et al.
Coe Philip R.
TOA Medical Electronics Co., Ltd.
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