Agitating – Mortar mixer type – Movable mixing chamber
74449, 74DIG10, B01F 1100
A composite gear of metal and plastic is provided and specifically a composite ring gear for a cement mixer. The ring gear for rotating the mixing drum of a cement mixer is commonly formed by stamping teeth in a metal flange circumjacent an intermediate portion of the mixing drum. Such gears have been noisy and lack impact resistance. The new ring gear comprises a metal flange to which is affixed a plurality of arcuate gear segments of a plastic material having gear teeth formed therein. The teeth of the plastic segments mesh with a drive pinion gear. The composite gear is much quieter and is also more impact resistant during operation. The segments can also be inexpensively and readily replaced, if necessary.
patent: 2470100 (1949-05-01), Heine
patent: 3225616 (1965-12-01), Whitehead
patent: 3361004 (1968-01-01), Williams et al.
Christian Leonard D.
Gutchess, Jr. Allen D.
The J. B. Foote Foundry Co.
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