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US 4,290,790 AGranted
Filter apparatus and filter support frames
AssigneeKabushiki Kaisha Hosokawa Funtai Kogaku Kenkyusho
InventorKunio Okubo
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AssigneeKabushiki Kaisha Hosokawa Funtai Kogaku Kenkyusho
InventorKunio Okubo
Estimating the term…
Filtering apparatus 1 comprises a generally cylindrical lattice frame 6, for supporting a filter bag 3, and an annular support member 13 from which extend rods 12 connected together by channel-shaped straps 14, 24 or 34. The technical problem is to provide a frame for a filter which is compact for transport to the erecting site yet quick and straight-forward to erect. Cut-outs 18 are formed in the side walls 14b of the straps 14, 24 or 34 and the support member 13 is fashioned from a flat strip of material. For transport the rods 12 are located in the cut-outs 18 and spot-welded to the straps 14, 24 or 34 and to support member 13 while the straps 14, 24 or 34 and the support member 13 are laid out flat; several such flat assemblages may then be stacked on one another. At the erecting site the support member 13 and straps 14, 24 or 34 are bent round into shape, the straps 14, 24 or 34 being bent in the region of each cut-out 18 so as to deform each cut-out 18 to retain the corresponding rod 12 therein.
A frame for supporting a filter element, the frame comprising a support member, a plurality of rods extending from the support member and secured thereto, and at least one strap connecting the rods together, said at least one strap having a base part to which is secured each rod, and at least one side wall which projects from the base part, said at least one side wall being formed with a cut-out for each rod for retaining that rod therein such that said frame is generally flat with the support member and said at least one strap generally straight when in an unassembled condition and said support member is bent and said at least one strap is bent in the region of each cut-out until its ends meet or overlap, so that each cut-out is deformed, to form a generally tubular frame in which each of said rods is substantially enclosed in one of said cut-outs of said at least one strap when in an assembled condition.
Dependencies are inferred from the claim text.