Conveyors: fluid current – Load flow diverter – divider – or combiner
Patent
1998-11-04
2000-12-05
Ellis, Christopher P.
Conveyors: fluid current
Load flow diverter, divider, or combiner
406 85, 406141, 406194, 222630, 118308, 417187, 239 61, B65G 5118, B65G 5352
Patent
active
061557528
ABSTRACT:
The invention concerns powder spray coating equipment comprising an air divider (16) to adjustably divide a total-air flow (6, 14) into a conveying-air flow (54, 57, 70) and a supplemental-air flow (56, 84, 86) in such manner that, when adjusting for a larger flow of conveying air, the flow of supplemental air shall be reduced in a predetermined ratio, and vice versa; further comprising an injector (76) to aspirate and to pneumatically convey coating powder by means of the flow of conveying air; and a supplemental-air intake (89) into the air/powder path (76, 82). The conveying-air path (54, 57, 70) and the supplemental-air path (56, 84, 86) each are fitted with at least one throttling duct each constituted by at least one channel (40, 42) in a rotatable shaft (34, 36) and by a bearing surface (39) covering the channel. The channels (40, 42) run in the circumferential shaft direction and their cross-section decreases monotonely from a channel beginning (41, 43) as far as a channel end (45, 47) whereby, together with the bearing surface (39) they form an increasingly larger flow impedance. The total-air path (6, 12, 14) communicates with the channel beginnings (41, 43). A conveying-air discharge aperture (54) is present in the bearing surface (39) above the channel (40) of the conveying-air path, and a supplemental-air discharge aperture (56) is present above the channel (42) of the supplemental-air path in the bearing surface (39), said discharge apertures running only over a very short segment of the the length of the channels.
REFERENCES:
patent: 3625404 (1971-12-01), Probst
patent: 4284032 (1981-08-01), Moos et al.
patent: 5131350 (1992-07-01), Buschor
patent: 5356577 (1994-10-01), Boldis et al.
Dillon, Jr. Joe
Ellis Christopher P.
ITW Gema AG
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