Rotary expansible chamber devices – Non-metallic working member – cylinder or partition
Patent
1981-12-03
1984-08-14
Vrablik, John J.
Rotary expansible chamber devices
Non-metallic working member, cylinder or partition
418178, 418226, 418255, 418261, F04C 200, F04C 1500
Patent
active
044654456
ABSTRACT:
A pivoted vane rotary pump especially for pumping food-stuff and abrasive material comprises a split housing in which a hub is rotatable, with an annular channel formed between the outer periphery of the hub and the inner periphery of the housing. Pivoted vanes on the hub are rotatable about radial axes between a position in which they are crosswise of a transport portion of the channel between an intake and a discharge and a position in which they move edgewise in a restricted sealing portion of the channel between the discharge and the intake. The housing is lined with elastomeric plastic material which is vulcanized to metal housing parts of pumps for handling foodstuff or corrosive media, or is vulcanized to metal carrier plates removably secured to housing parts of pumps for handling abrasive media. The pump can be easily disassembled for cleaning and for servicing, including replacement of the plastic lining of pumps for abrasive media. In one embodiment, a plastic axial guide member secured to the hub engages annular shoulders on pivot shafts of the vanes to prevent axial movement while permitting pivoting of the vanes.
REFERENCES:
patent: 249345 (1881-11-01), Halstead et al.
patent: 601158 (1898-03-01), Murphy
patent: 1263639 (1918-04-01), Bertsch
patent: 2776086 (1957-01-01), Selden
patent: 2966860 (1961-01-01), Maynard
patent: 3310322 (1967-03-01), Carroll
patent: 3895893 (1975-07-01), Sommer
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Sommer geb. Heyd Ursula
Vrablik John J.
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