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US 4,051,033 AGranted
Filter device
AssigneeBlace Filtronics, Inc.
InventorRoy J. Blace
Life of this patent
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AssigneeBlace Filtronics, Inc.
InventorRoy J. Blace
Estimating the term…
A diatomite filter device for cleansing fluid carrying particulate matter in the micron size range comprises a filter housing having top and bottom plates and a manifold beneath the latter. A supply conduit communicates with the manifold and with a valve-controlled diatomite reservoir. Flexible tubular filter bags in the housing have inlet openings at the bottom and are mounted about flanges adjacent inlet openings in the housing bottom plate, the latter being in communication with the manifold for a supply of fluid. Each bag has an interior skeletal frame for preventing bag collapse during a backwash operation and an exterior wire mesh skeletal frame for preventing ballooning of the bag during the filter operation. The assemblies comprising a bag and its two associated skeletal frames are mounted at lower end portions about their flanges by means of clamping rings and, preferably, each flange has a horizontal flange at the top notched to receive lower end portions of the inner skeletal frame. The lower end portions of the bags and the exterior skeletal frames are bent inwardly beneath the horizontal flange and about the mounting flange. The wire mesh of the exterior frame is approximately one-quarter inch square, of stainless steel and, optionally, of epoxy-coated construction.
Filter apparatus for internal precoat of filter bags, and for fluid flow respectively in an upward and downward direction for filtering fluid and providing backwash cleaning of said apparatus, said apparatus comprising an upright housing having sidewalls, a top cover with an outlet for filtered fluid located therein, a bottom cover with an inlet for fluid to be filtered located therein, a horizontally arranged bottom wall located in a lower portion of said housing and spaced above said bottom cover, circular openings located in said bottom wall with short tubular flange sections located at said openings and extending upwardly therefrom, vertically extending rod members constructed and arranged to define a vertical skeleton tube surrounding each of said tubular flange sections, a flexible tubular filter bag with a closed top, sidewalls, and an open bottom surrounding each of said skeleton tubes, the lower edge of the sidwall of each bag sealingly connected to the tubular flange section which it surrounds, perforate frame means surrounding the exterior surface of each of said filter bags with clamp means arranged at the lower edge thereof as fastening means connecting said exterior frame, said filter bag, and said skeleton tube to the exterior surface of its corresponding tubular flange, filter aid media supply means connected to said bottom cover inlet whereby it may be introduced to the interior of each of said filter bags by a pressurized source of fluid to be filtered, backwash means in fluid communication with said top cover outlet whereby backwash of said filter bags occurs in a direction from the exterior to the interior through their sidewalls with discharge of washed material through said bottom cover inlet opening.
A filter apparatus as set forth in claim 10 wherein each lower end portion of each of said perforate frame means and filter bags is bent generally radially inwardly beneath its associated horizontal flange by its associated clamp means, the latter being disposed externally of the said frame means, and the assembled elements thus being secured against unintended vertical upward displacement relative to the associated flange.
Dependencies are inferred from the claim text.