Self-cleaning filter
AssigneeFiltration Ltd.
InventorYtzhak Barzuza
Life of this patent
Estimating the term…
Abstract
A self-cleaning filter including a filter housing having at least a raw-liquid inlet and a clean-liquid outlet, a filter medium interposed between the raw-liquid inlet and the clean-liquid outlet At least one nozzle is located in proximity to the filter medium and is connectable to at least two different sources of pressure, one of which pressures is higher than the pressure prevailing in the filter, the other one being lower than the pressure prevailing in the filter There is also provided an arrangement to produce a relative movement between the filter medium and the at least one nozzle to the effect of having a substantial part of the surface area of the filter medium covered by the nozzle.
Claims21
A self-cleaning filter comprising:
- a filter housing having at least one raw-liquid inlet and one clean-liquid outlet;
- a filter medium interposed between said raw-liquid inlet and said clean-liquid outlet;
- first pressure producing means for producing a pressure higher than the pressure prevailing in said filter housing;
- second pressure producing means for producing a pressure lower than the pressure prevailing in said filter housing;
- at least one nozzle located in proximity to said filter medium,
- means for selectively connecting said at least one nozzle to said first and second pressure producing means, and
- means to produce relative movement between said filter medium and said at least one nozzle to the effect of having a substantial part of the surface area of said filter medium covered by said nozzle.
A self-cleaning filter, comprising:
- a) a filter housing having at least one raw-liquid inlet and one clean-liquid outlet;
- b) a substantially cylindrical filter medium interposed between said raw-liquid inlet and said clean-liquid outlet;
- c) first and second pressure-producing means for producing pressures different from the pressure prevailing in proximity to said filter housing;
- d) at least two nozzles located in proximity to said filter medium and respectively connected to said first and second pressure-producing means;
- e) first means to produce a relative, reciprocatingly translational movement between said filter medium and said at least two nozzles;
- and
- f) second means to produce a relative, rotational movement between said filter medium and said at least two nozzles, said translational and said rotational movements being superposed one upon the other to the effect of having a substantial part of said filter medium covered by said nozzles;
- g) wherein the pressure produced by said first pressure-producing means is higher than the pressure prevailing in said filter housing and the pressure produced by said second pressure-producing means is lower than the pressure prevailing in said filter housing.
A self cleaning filter comprising:
- a) a filter housing having a fluid inlet and a fluid outlet;
- b) a filter medium interposed between said inlet and outlet for filtering fluid entering said housing through said inlet and exiting said housing through said outlet;
- c) a nozzle operatively oriented with respect to said filter medium;
- d) means mounting said nozzle in said housing for effecting relative lateral movement with respect to said filter medium;
- e) means for alternatively supplying to said nozzle a source of fluid having a pressure greater than the pressure in said housing thereby causing the last mentioned fluid to impinge on said filter medium, and a source of fluid having a pressure less than the pressure in said housing thereby causing fluid in the housing to be drawn into said nozzle through said filter medium.
A self cleaning filter comprising:
- a filter housing having a fluid inlet and a fluid outlet;
- b) a filter medium interposed between said inlet and outlet for filtering fluid entering said housing through said inlet and exiting said housing through said outlet;
- c) at least one nozzle operatively oriented with respect to said filter medium;
- d) means mounting said nozzle in said housing for effecting relative movement with respect to said filter medium;
- e) means for alternatingly connecting said nozzle. to a source of fluid having a pressure higher than the pressure in said housing, thereby causing the last mentioned fluid to impinge on said filter medium, and to a source of fluid having a pressure lower than the pressure in said housing, thereby through said filter medium.
Dependencies are inferred from the claim text.