Valves and valve actuation – Rotary valves – Ball valve
Patent
1974-08-20
1976-10-05
Coe, Philip R.
Valves and valve actuation
Rotary valves
Ball valve
251129, 259DIG41, 259DIG43, B01F 1100, B06B 118
Patent
active
039840867
ABSTRACT:
An electro viscous vibrator comprises a double-headed dumb-bell shaped piston, of which the two heads are each axially movable within a separate cylindrical chamber, and a pair of concentric annular electroviscous valves in each chamber surrounding the piston head contained therein. Each pair of valves is preferably constituted by an annular electrode assembly disposed between the wall of the respective chamber, and the associated piston head, each valve of the pair being constituted by one of the two annular gaps thus formed between the chamber wall and the electrode assembly and between the electrode assembly and the piston head, suitable electrodes being located on the electrode assembly. The chamber wall and the piston head are preferably earthed, so that when an axial flow of electroviscous fluid is passed through each valve and an electrical voltage is applied alternately across a selected one of the valves of each pair simultaneously and then across the other valve of each pair simultaneously, an axial reciprocatory motion is imposed on the piston.
REFERENCES:
patent: 2902251 (1959-09-01), Oncley
patent: 3289017 (1966-11-01), Klass et al.
patent: 3304446 (1967-02-01), Martinek et al.
patent: 3465732 (1969-09-01), Kattchee
patent: 3524474 (1970-08-01), McCormick
patent: 3614486 (1971-10-01), Smiley
Coe Philip R.
Laser Engineering (Development) Limited
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