Backwashable fluid filters
OwnerMordeki Droriinventor
Life of this patent
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Abstract
A backwashable filtering device is described comprising a housing having a filter body and a backwash nozzle disposed therein, characterized in that the backwash nozzle is fixed with respect to the housing, the filter body is rotatably mounted with respect to the backwash nozzle, and the filtering device further includes a rotor and gear drive means rotating the filter body by the energy of the backwash fluid flowing through the nozzle.
Claims8
A backwashable filtering device, comprising a housing including an inlet connectable to an upstream fluid pipe, and an outlet connectable to a downstream fluid pipe;
- a filter body disposed within the housing and having an upstream surface on the housing inlet side thereof to intercept dirt particles in the fluid flowing in the forward direction through the filter body from the housing inlet to the housing outlet;
- and a backwash nozzle having an inlet opening disposed adjacent to said upstream surface of the filter body for backwashing the filter body;
- characterized in that:
- said backwash nozzle is fixed with respect to said housing, said filter body being mounted for rotation with respect to the backwash nozzle and including teeth annularly disposed around one end thereof, a rotor within said housing and having blades in the path of the fluid flowing through the nozzle so as to be rotated thereby, and gear means within said housing and coupling said rotor to said teeth on the filter body to rotate said filter body relative to said nozzle to enable the nozzle inlet opening to scan substantially the complete upstream surface of the filter body.
A backwashable filtering device, comprising a housing including an inlet connectable to an upstream fluid pipe, and an outlet connectable to a downstream fluid pipe;
- a filter body disposed within the housing and having an upstream surface on the housing inlet side thereof to intercept dirt particles in the fluid flowing in the forward direction through the filter body from the housing inlet to the housing outlet;
- and a backwash nozzle body having an inlet opening disposed adjacent to said upstream surface of the filter body for backwashing the filter body;
- characterized in that said filtering device further includes drive means for rotating said filter body with respect to said nozzle body to enable the nozzle inlet opening to scan substantially the complete upstream surface of the filter body, which drive means comprises a rotor having blades disposed within said housing in the path of the fluid flowing through the nozzle body so as to be rotated thereby, gear teeth formed at one end of said filter body, and gear means disposed within said housing and coupling said rotor to said gear teeth to rotate the filter body by the energy of the backwash fluid flowing through said nozzle body.
Dependencies are inferred from the claim text.