Plural piston, adjustable diluting device having a volume indica

Details Plural piston, adjustable diluting device having a volume indica Plural piston, adjustable diluting device having a volume indica

1977-05-02

1979-02-27

Tollberg, Stanley H.

Measuring and testing

Measuring vessel

222 43, 222309, G01N 114, G01F 1106

Patent

active

041412508

ABSTRACT:
The invention provides an adjustable diluting device comprising a casing and a tapered tubular element or nose member, a volume-adjustment mechanism coupled with an indicator assembly, and a plunger unit movable in said casing; the plunger unit comprises a first piston having a central recess, a second piston adapted to slide in the recess with the interposition of a frictionally mounted joint, a sleeve for controlling the first piston, a shaft for controlling the second piston adapted to slide inside the sleeve, and a push button fixed to the upper end of the control shaft and adapted to cooperate with the upper end of the sleeve. The invention is particularly applied to the mixing of a determined volume of a liquid sample and of a determined volume of a liquid diluent.

REFERENCES:
patent: 3013435 (1961-12-01), Rodrigues, Jr.
patent: 3613952 (1971-10-01), Gimont et al.
patent: 3646817 (1972-03-01), Hinchman et al.
patent: 3855867 (1974-12-01), Roach
patent: 4054062 (1977-10-01), Bronham

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