Grinders

Details Grinders Grinders

1977-09-01

1979-05-08

Spicer, Jr., Robert L.

Solid material comminution or disintegration

Apparatus

Rolls frictionally driven and supported by relatively moving...

B02C 1500

Patent

active

041532090

ABSTRACT:
A grinder for material wherein a series of hollow balls is entrained for rotational movement between an upper ring and a lower ring, the rings being relatively rotatable about a control axis, and the balls being rotatable between the rings, and the material for grinding being fed into a zone between the balls and rings. The contact zone between the upper ring and each ball is defined by two annular lips and is substantially less than the contact zone between the lower ring and each ball.

REFERENCES:
patent: 290874 (1883-12-01), Feldmann
patent: 615278 (1898-12-01), Johnson
patent: 2906467 (1959-09-01), Poole
patent: 3044716 (1962-07-01), Frenkel et al.

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