Fluid dispensing device

Details Fluid dispensing device Fluid dispensing device

1989-04-13

1990-12-11

Raevis, Robert

Measuring and testing

Sampler, sample handling, etc.

Capture device

B01L 302

Patent

active

049761617

ABSTRACT:
A fluid dispensing device appropriate for precision measuring of exactly determined dosages of fluid in the course of metering, diluting and titrating.
The fluid dispensing device has a control unit together with a programmable electronic circuit, a keyboard and a display; a drive unit with a motor and piston-cylinder units, each a cylinder and a piston, which are placed into a separate housing. The shaft of this motor is connected to pistons by a coupling, and each cylinder is connected to a corresponding pipette by a flexible electro-pneumatic conduit. The pneumatic conduits and conductors have a common casing. The programmable electronic circuit has a temperature compensation system provided with temperature-sensitive elements, preferably thermistors, one of them being seated inside the housing, near one of the pistons, while the other is seated into a bracket used for mounting the other pipette.

REFERENCES:
patent: 3915651 (1975-10-01), Nishi
patent: 4101283 (1978-07-01), Sundstrom
patent: 4475666 (1984-10-01), Bilbrey et al.
patent: 4598840 (1986-07-01), Burg
patent: 4671123 (1987-06-01), Magnussen, Jr.
patent: 4779467 (1988-10-01), Rainin et al.
patent: 4821586 (1989-04-01), Scordato et al.

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