Conveyors: fluid current – With means to control conveying fluid or movement of load in... – Control of load input or output
Patent
1995-05-09
1996-01-02
Pike, Andrew C.
Conveyors: fluid current
With means to control conveying fluid or movement of load in...
Control of load input or output
406 65, 222368, 222636, B65G 5366, B65G 5346
Patent
active
054802687
ABSTRACT:
A rotary airlock feeder is connected to transfer particulate material between a storage bin and a pneumatic convey line. The pneumatic convey line includes a pressure reducing orifice plate which produces a pressure differential in the convey line between the upstream and downstream sides of the orifice plate. Air from the upstream side flows into respective specially designed end plates of the feeder and the pressure differential between opposite sides of the orifice assures a steady purge air flow circumferentially around a pair of rotary shrouds and into the feeder. This steady air flow prevents particulate material or debris from entering cavities between the shrouds and the end plates and between the rotary shrouds and the housing walls and thus prevents such material from reaching the seals, shaft area, and bearings of the feeder and protects the rotary shrouds from premature abrasive wear. The end plates can include machined annular recesses which are designed to introduce and equalize the purge air flow about the rotary shrouds.
REFERENCES:
patent: 2477414 (1949-07-01), McBride
patent: 2750233 (1956-06-01), Yellott
patent: 3085831 (1963-04-01), Mylting
patent: 3151784 (1964-10-01), Tailor
patent: 3206254 (1965-09-01), Mylting
patent: 3273758 (1966-09-01), Starrett
patent: 3291536 (1966-12-01), Smoot
patent: 3554608 (1971-01-01), Farnworth et al.
Pike Andrew C.
Smoot Company
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