Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Patent
1987-02-03
1991-02-12
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
134195, 134201, 220380, B08B 304
Patent
active
049916106
ABSTRACT:
The present application is directed to new and improved apparatus for use in analytical instruments which includes an elongated dosing tube having a tip at one end which is constructed and arranged to move between a sample vessel, a rinsing vessel and an analytical instrument; the other end of the dosing tube being connected in fluid flow communication to a rinsing liquid supply vessel through a sample pump assembly and a rinsing liquid pump assembly; the liquid pump assembly including a pump cylinder having an inlet and an outlet; a pump piston arranged for reciprocal movement in the pump cylinder between a first end position in the discharge direction and an opposite second end position in the intake direction; a first check valve mounted on the inlet of the pump cylinder and a second check valve mounted on the outlet of the pump cylinder; a seal mounted adjacent the outlet which cooperates with the pump piston to sealingly close the outlet when the pump piston is positioned in its first end position in the discharged direction.
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Huber Bernhard
Tomoff Toma
Grimes Edwin T.
Murphy Thomas P.
Stinson Frankie L.
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