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US 12,447,424 B2Granted
Automatic self-cleaning backwash strainer
AssigneeThe Hellen Strainer Company
InventorJames L. Hollingsworth
Life of this patent
Estimating the term…
Abstract
A strainer includes a housing having an inlet port, an outlet port, and a flow path from the inlet port to the outlet port. A strainer drum is supported for rotation in the housing. The drum has an open end arranged in the flow path to receive water flowing from the inlet port into the drum through the open end, and has a porous side wall arranged in the flow path to strain solids from water flowing outward from the drum through the porous side wall. A backwash tube has a backwash inlet located inside the drum and facing outward of the drum beside an inner surface of the porous side wall.
Claims12
An apparatus comprising:
- a housing having an exterior body wall;
- a plurality of internal partition walls disposed within the housing that divide the housing into a first chamber disposed at a first end of the housing, a second chamber disposed at an opposing second end of the housing, and an intermediate chamber disposed between the first and second chambers;
- a first inlet port defined in the exterior body wall of the housing in the first chamber;
- a second inlet port defined in the exterior body wall of the housing in the second chamber;
- a plurality of outlet ports defined in the exterior body wall of the housing in the intermediate chamber;
- a drum, wherein a single strainer drum is the only drum present in the apparatus, disposed and supported for rotation within the housing and having:
- an open first end journaled for rotation in a first partition wall dividing the first chamber from the intermediate chamber,
- an open second end, disposed opposite said first end, journaled for rotation in a second partition wall dividing the second chamber from the intermediate chamber,
- a porous cylindrical side wall extending between each of the open first end and the open second end, and
- a longitudinal central axis that is located coaxially within the intermediate chamber, the strainer drum being configured to rotate within the housing about the longitudinal central axis of the strainer drum, and to strain solids from fluid flowing from an interior of the strainer drum outward through the porous sidewall;
- a first flow path defined within the housing from the first inlet port, through the open first end of the strainer drum, into an interior of the strainer drum, and outward through the porous sidewall of the strainer drum to at least one of the outlet ports in the intermediate chamber;
- a second flow path defined within the housing from the second inlet port, through the open second end of the strainer drum, into an interior of the strainer drum, and outward through the porous sidewall of the strainer drum to at least one of the outlet ports in the intermediate chamber, wherein flow into the strainer drum from the first flow path and flow into the strainer drum from the second flow path are in opposite directions;
- and
- a backwash tube having an inlet section extending from the second chamber outside of the strainer drum into the interior of the strainer drum through the open second end about a longitudinal axis that is parallel to and noncolinear with respect to the longitudinal central axis of rotation of the strainer drum, and having a backwash inlet facing radially outward from the central rotational axis of the strainer drum and disposed adjacent an inner surface of the porous side wall.
11 more elements
An apparatus comprising:
- a housing having an exterior body wall;
- a plurality of internal partition walls disposed within the housing that divide the housing into a first chamber, a second chamber, and an intermediate chamber disposed between the first and second chambers;
- a first inlet port defined in the exterior body wall of the housing in the first chamber;
- a second inlet port defined in the exterior body wall of the housing in the second chamber;
- a plurality of outlet ports defined in the exterior body wall of the housing in the intermediate chamber between the first and second inlet ports;
- and
- a drum, wherein a single strainer drum is the only drum present in the apparatus, having:
- an open first end rotatably supported in a first partition wall separating the first chamber from the intermediate chamber,
- an open second end disposed opposite said first end and rotatably supported in a second partition wall separating the second chamber from the intermediate chamber,
- a porous cylindrical side wall disposed in the intermediate chamber and extending between each of the open first end and the open second end, and
- a longitudinal central axis that is located coaxially within the intermediate chamber, the strainer drum being configured to rotate within the housing about the longitudinal central axis of the strainer drum, and to strain solids from fluid flowing from an interior of the strainer drum outward through the porous sidewall.
8 more elements
An apparatus comprising:
- a housing having an exterior body wall;
- a plurality of internal partition walls disposed within the housing that divide the housing into a first chamber disposed at a first end of the housing, a second chamber disposed at an opposing second end of the housing, and an intermediate chamber disposed between the first and second chambers;
- a first inlet port defined in the exterior body wall of the housing in the first chamber;
- a second inlet port defined in the exterior body wall of the housing in the second chamber;
- a plurality of outlet ports defined in the exterior body wall of the housing in the intermediate chamber;
- a drum, wherein a single strainer drum is the only drum present in the apparatus, disposed within the intermediate chamber of the housing and having:
- an open first end rotatably supported in a first partition wall separating the first chamber from the intermediate chamber,
- an open second end disposed opposite said first end and rotatably supported in a second partition wall separating the second chamber from the intermediate chamber,
- a porous cylindrical side wall disposed in the intermediate chamber and extending between each of the open first end and the open second end, and
- a longitudinal central axis that is located coaxially within the intermediate chamber, the strainer drum being configured to rotate within the housing about the longitudinal central axis of the strainer drum, and to strain solids from fluid flowing from an interior of the strainer drum outward through the porous sidewall;
- a first flow path defined within the housing from the first inlet port, through the open first end of the strainer drum into an interior of the strainer drum in the intermediate chamber, and outward through the porous sidewall of the strainer drum to at least one of the outlet ports in the intermediate chamber;
- and
- a second flow path defined within the housing from the second inlet port, through the open second end of the strainer drum into an interior of the strainer drum in the intermediate chamber, and outward through the porous sidewall of the strainer drum to at least one of the outlet ports in the intermediate chamber, wherein flow into the strainer drum from the first flow path and flow into the strainer drum from the second flow path are in opposite directions.
10 more elements
Dependencies are inferred from the claim text.