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US 4,906,373 AGranted
Multiple filter elements with movable flushing assembly
OwnerMordeki Droriinventor
Life of this patent
Estimating the term…
Abstract
A multiple element filter system comprising a filter housing defining a water inlet for water to be filtered, a filtered water outlet, a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in the filter housing such that the upstream surfaces communicate with the water inlet and the downstream surfaces communicate with the filtered water outlet, and a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with the upstream surfaces of each of the plurality of filter elements and apparatus for selectable coupling of the communication member to a flush drain at atmospheric or relatively low pressure.
Claims20
A multiple element filter system comprising:
- a filter housing defining a water inlet for water to be filtered;
- a filtered water outlet;
- a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in said filter housing such that during filtering operation said upstream surfaces communicate with said water inlet and said downstream surfaces communicate with said filtered water outlet;
- a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with said upstream surfaces of each of said plurality of filter elements;
- and
- means for selectable coupling of said communication member to a flush drain,
- and wherein said communication member and said plurality of filter elements are mounted for selectable relative rotation whereby said communication member selectably engages the outer surfaces of individual ones of said plurality of filter elements.
4 more elements
A multiple element filter system comprising:
- a filter housing defining a water inlet for water to be filtered;
- a filtered water outlet;
- a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in said filter housing such that during filtering operation said upstream surfaces communicate with said water inlet and said downstream surfaces communicate with said filtered water outlet;
- a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with said upstream surfaces of each of said plurality of filter elements;
- and
- means for selectable coupling of said communication member to a flush drain,
- and wherein each individual one of said plurality of filter elements is rotatably mounted.
4 more elements
A multiple element filter system comprising:
- a filter housing defining a water inlet for water to be filtered;
- a filtered water outlet;
- a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in said filter housing such that during filtering operation said upstream surfaces communicate with said water inlet and said downstream surfaces communicate with said filtered water outlet;
- a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with said upstream surfaces of each of said plurality of filter elements;
- and
- means for selectable coupling of said communication member to a flush drain,
- and wherein said flushing assembly comprises means exterior of said filter housing for selectably rotating said communication member into communication with the outer surfaces of at least one of said plurality of filter elements and for providing rotation of said at least one of said plurality of filter elements while said at least one of said plurality of filter elements is in communication with said communication member.
4 more elements
A multiple element filter system comprising:
- a filter housing defining a water inlet for water to be filtered;
- a filtered water outlet;
- a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in said filter housing such that during filtering operation said upstream surfaces communicate with said water inlet and said downstream surfaces communicate with said filtered water outlet;
- a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with said upstream surfaces of each of said plurality of filter elements;
- and
- means for selectable coupling of said communication member to a flush drain,
- wherein said communication member is formed with a communication inlet slot which is brought into communication with the outer surfaces of individual ones of said plurality of filter elements by rotation of said communication member,
- and wherein said flushing assembly comprises:
- communication member extension means coupled to said communication member;
- and
- element extension means coupled to individual ones of said plurality of filter elements, for providing rotation of each individual one of said plurality of filter elements about its own longitudinal axis from a location external of said filter housing.
8 more elements
A multiple element filter system comprising:
- a filter housing defining a water inlet for water to be filtered;
- a filtered water outlet;
- a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in said filter housing such that during filtering operation said upstream surfaces communicate with said water inlet and said downstream surfaces communicate with said filtered water outlet;
- a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with said upstream surfaces of each of said plurality of filter elements;
- and
- means for selectable coupling of said communication member to a flush drain,
- and wherein said flushing assembly includes means for providing relative rotation between said communication member and said plurality of filter elements about a first axis and rotation of each individual one of said plurality of filter elements about its own longitudinal axis which lies parallel to said first axis.
4 more elements
A multiple element filter system comprising:
- a filter housing defining a water inlet for water to be filtered;
- a filtered water outlet;
- a plurality of cylindrical filter elements, each defining upstream and downstream surfaces, disposed in said filter housing such that during filtering operation said upstream surfaces communicate with said water inlet and said downstream surfaces communicate with said filtered water outlet;
- a flushing assembly including a movable flushing communication member arranged for selectable flushing communication with said upstream surfaces of each of said plurality of filter elements;
- and
- means for selectable coupling of said communication member to a flush drain,
- and wherein said means for selectable coupling of said communication member to said flush drain comprises means for blocking said water outlet during flushing.
4 more elements
Dependencies are inferred from the claim text.