Solid material comminution or disintegration – Processes – Subjecting material to impact by moving comminuting surface
Patent
1987-04-20
1988-08-30
Rosenbaum, Mark
Solid material comminution or disintegration
Processes
Subjecting material to impact by moving comminuting surface
291189A, 291190, B02C 13288
Patent
active
047670665
ABSTRACT:
A downdraft reversible hammer mill having a casing structure for rotatably supporting a hammer assembly between a top inlet and a bottom outlet, breaker plates pivoted near the top inlet and extending down on opposite sides of the circular path of the hammer assembly, grate bars circumscribing the hammer assembly and having opposite end grate bars extending into cooperative relation with the bottom ends of the breaker plates, such that by controlling the positions of the breaker plates relative to both the circular path of the hammer assembly and the end grate bars, with one breaker plate moved in adjacent the circular path and the opposite breaker plate moved back from the circular path to open the cooperating end grate bar, the mill is caused to operate with a negative pressure at the inlet and a positive pressure at the outlet to establish a downdraft effect in the mill casing structure in either direction of hammer assembly of rotation upon properly positioning one breaker plate moved in and the opposite breaker plate moved out. The breaker plates are provided with teeth positioned for shredding the plastic bags that contain trash to prevent blinding the mill by such bags that tend to cling to the hammers.
REFERENCES:
patent: 1751009 (1930-03-01), Liggett
patent: 2767929 (1956-10-01), West
patent: 3083921 (1963-04-01), Danyluke et al.
patent: 3610543 (1971-10-01), Jensen
patent: 3667694 (1972-06-01), Williams
patent: 4009836 (1977-03-01), Strom et al.
patent: 4049206 (1977-09-01), Konig et al.
Bulletin of the Pennsylvania Crusher Division, 10-1962.
Rosenbaum Mark
Williams Patent Crusher and Pulverizer Company
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