Dispensing – With recorder – register – indicator – signal or exhibitor – With zero-setting mechanism
Patent
1977-07-18
1979-07-03
Spar, Robert J.
Dispensing
With recorder, register, indicator, signal or exhibitor
With zero-setting mechanism
734254P, 222 43, 222 47, 222309, B67D 526
Patent
active
041597842
ABSTRACT:
The present invention relates to a device for dispensing adjustable volumes of a liquid, comprising a stopper adaptable on the neck of a flask, which incorporates a device with valves; a calibrated cylinder which is mounted in the stopper and which comprises, near its free upper end, a fixed, outwardly projecting, annular stop; a calibrated cylindrical plunger adapted to cooperate with said calibrated cylinder; a body for actuating the calibrated plunger, internally defining a first cavity in which a threaded adjusting shaft is adapted to be housed, which shaft may modify the vertical position of a nut; a digital display system mounted in the upper part of the threaded shaft; a member for driving the shaft in rotation, and a connector is provided to connect the actuator body with the upper part of the calibrated plunger. The invention finds particular application in laboratory equipment.
REFERENCES:
patent: 2819934 (1958-01-01), Luterick
patent: 3003470 (1961-10-01), Geyer
patent: 3013435 (1961-12-01), Rodrigues
patent: 3143252 (1964-08-01), Shapiro
patent: 3613952 (1971-10-01), Gilmont
patent: 3805998 (1974-04-01), Croslin
patent: 3827305 (1974-08-01), Gilson et al.
patent: 3940027 (1976-02-01), Marterer
patent: 4003499 (1977-01-01), Shapiro et al.
patent: 4072247 (1978-02-01), Yamazaki
Silverberg Fred A.
Spar Robert J.
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