Hand-held pipette for repetitively dispensing precise volumes of

Details Hand-held pipette for repetitively dispensing precise volumes of Hand-held pipette for repetitively dispensing precise volumes of

1976-08-25

1978-07-11

Bell, Houston S.

Fluent material handling, with receiver or receiver coacting mea

Filling or refilling of dispensers

By operation of means causing or controlling dispensing

734256, 128218C, 222318, 222391, 417435, B65B 312

Patent

active

040995488

ABSTRACT:
A hand-held pipette with a liquid dispensing knob at one end operably connected therewithin to a piston and piston cylinder assembly at the opposite end that is detachable from the pipette body for cleaning or replacement. An internal pawl and rack mechanism causes the piston to advance a small amount each time the knob is pressed, thereby repetitively dispensing small volumes of liquid therefrom. A second knob cooperatively engages an internal mechanism for both urging the piston to an overshoot position within the piston chamber and to disengage the piston from the internal mechanism in the pipette housing.

REFERENCES:
patent: 3790048 (1974-02-01), Luciano et al.

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