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US 4,045,853 AGranted
Method of manufacturing filter drums
AssigneeAlar Engineering Corporation
InventorHarold R. White
Life of this patent
Estimating the term…
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AssigneeAlar Engineering Corporation
InventorHarold R. White
Estimating the term…
Filter drums of desired diameters and axial lengths are built up from cylindrical modules supported in end-to-end relation on a through axle. Each module has a cylindrical frame composed of end rings connected by and supporting a ring of circumferentially spaced longitudinal bars. A grid formed in the flat by welding spaced parallel transverse ribs to underlying spaced parallel longitudinal rods is rolled into a cylindrical shape and wrapped around bars of the module with the rods of the grid forming hoops which are welded to the bars. The through axle has end heads and intermediate spiders mounted thereon. The outboard rings of the modules forming the end sections of the drum are secured to the heads and the inboard rings of these end modules are secured to the end rings of the intermediate modules with spider legs on the axle secured to one ring of an adjacent pair of rings. One or more filter cloths are then wrapped around the ribs of the resulting drum to form the outer screen filtering periphery for the drum.
The method of making a filter drum which comprises the steps of, making an elongate flat grid comprised of elongate spaced rods with overlying spaced ribs arranged transversely of said rods and secured thereto, rolling said grid into cylindrical form, forming a cylindrical frame constructed of open end rings and circumferentially spaced longitudinal bars connecting said end rings, wrapping said rolled grid around said cylindrical frame with the grid rods overlying the frame bars, joining opposed ends of the wrapped grid, securing a plurality of said grid wrapped cylindrical frames in end to end relation around a through axle by means of spiders on the axle secured to the frame end rings, mounting end heads on end portions of the through axle, and securing the end heads to the opposite ends of the assembled cylindrical frames.
Dependencies are inferred from the claim text.