Solid material comminution or disintegration – Apparatus – Plural rotary or oscillatory surfaces cooperate with common...
Patent
1998-04-17
1999-05-18
Husar, John M.
Solid material comminution or disintegration
Apparatus
Plural rotary or oscillatory surfaces cooperate with common...
241119, 241166, 241167, B02C15/00
Patent
active
059043075
ABSTRACT:
A scraper assembly for use with an associated coal pulverizer or as part of a coal pulverizer having a vertical axis with a central hub that rotates during normal operation of the pulverizer. The scraper assembly includes a bracket dimensioned and configured for attachment to the hub of the coal pulverizer that rotates in the normal operation of the coal pulverizer. The apparatus also includes a shaft extending from the bracket. The shaft is substantially horizontal and the apparatus also includes a scraping element pivotally mounted on the shaft. A torsion spring biases the scraping element with respect to the shaft. In some forms of the invention the scraping element comprises a first and second journals engaging the shaft at axially spaced points and the scraping element further includes first and second arms extending radially away from the shaft that are respectively fixed to the first and second journals. The apparatus may further include a first plate shaped member carried on the first and second arms and a second plate shaped member removably attached to the first plate shaped member.
REFERENCES:
patent: 2461176 (1949-02-01), Piper
patent: 2626758 (1953-01-01), Scarlett
patent: 2641387 (1953-06-01), Christensen
patent: 2818219 (1957-12-01), Straight
patent: 3556419 (1971-01-01), Frangquist et al.
patent: 4860962 (1989-08-01), Kiefer et al.
patent: 5480099 (1996-01-01), Bunton
Prairie Robert S.
Przybycien Ronald P.
Combustion Engineering Inc.
Husar John M.
Smith Robert S.
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