A self-cleaning filter device comprises a fluidic oscillator having a pair of passages through which fluid is directed alternately, and filter elements which fluid can flow from said passages to an auxiliary outlet. A main outlet communicates with the passages in such a way that the filter elements do not impede fluid flow to the main outlet. Between each passage and the main outlet is a device which provides a higher impedance to flow from the main outlet to the passages than to flow in the opposite direction, and assists the self-cleaning action of the filter elements by increase the difference between the fluid pressures in the passages.
申请公布号
US4155850(A)
申请公布日期
1979.05.22
申请号
US19780870875
申请日期
1978.01.20
申请人
LUCAS, JOSEPH (INDUSTRIES) LTD
发明人
BLANDFORD, GEORGE A;ORLOFF, GEORGE;RATHBONE, RICHARD;WATTS, PETER L