Rock grader with tilting sorter screen

Details Rock grader with tilting sorter screen Rock grader with tilting sorter screen

1980-08-15

1981-11-10

Hill, Ralph J.

Classifying, separating, and assorting solids

Sifting

Discharging

209420, B07B 128

Patent

active

042996953

ABSTRACT:
A grading plant with self-cleaning screen for lump materials, the screen (3) being pivotally mounted to a carriage (2) displaceable on horizontal beams (1). The screen has wheels (5) guided in tracks in the beams. Each track has a horizontal portion (11) and a curved downwards directed portion (12). The screen is in a position for discharging when the wheels (5) are in the lowermost part of the downwards directed portion. The motion of the screen (3) is exerted by a moving device consisting of a wire arrangement (7) for the backwards directed movement and a return spring (20) for the return motion, or a double-acting hydraulic cylinder (18) moving the carriage in both directions.

REFERENCES:
patent: 1278551 (1918-09-01), Allison
patent: 1448596 (1923-03-01), Kovach
patent: 1685823 (1928-10-01), Mayer
patent: 2396954 (1946-03-01), Kranz et al.
patent: 2690840 (1954-10-01), Kohlmier
patent: 3402816 (1968-09-01), Taylor

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