Measuring valve for dosing liquids or gases

Details Measuring valve for dosing liquids or gases Measuring valve for dosing liquids or gases

1986-09-11

1988-02-16

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

By electric transducer

2395332, 310327, B05B 130, F02M 6108, F02M 5106

Patent

active

047250020

ABSTRACT:
A metering valve includes a piezoelectric cylinder connected via a spring biased needle to a valving element for closing a metering opening. To compensate for slow changes in the length of the piezoelectric control member, there is provided a damping piston connected axially to the piezoelectric member and being movable in a well formed in the valve housing and defining with the end face of the piston a damping chamber. A tubular membrane surrounds a portion of the damping piston and is attached to the piezoelectric member and to an inner wall of the housing around the opening of the well to define with the piston an annular equalizing space. The damping and equalizing spaces are filled with liquid and communicate with one another via a narrow throttling gap formed between facing walls of the well and of the piston.

REFERENCES:
patent: 4441101 (1984-04-01), Robar
patent: 4531676 (1985-07-01), Siefert et al.
patent: 4575008 (1986-03-01), Kaczynski
patent: 4605171 (1986-08-01), Trachte et al.

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