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US 4,482,455 AGranted
Dual frequency vibratory screen for classifying granular material
OwnerCecil T. Humphreyinventor
Life of this patent
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Abstract
An apparatus for classifying granular material comprises an outer frame and an inner frame, a screen deck mounted in the inner frame; apparatus suspending the inner frame and deck from the outer frame; resilient apparatus mounting the deck on the inner frame; apparatus for vibrating the at least one screen at the high frequency and in a generally vertical plane and apparatus for applying the lower frequency motion to the inner frame and deck in a generally horizontal plane.
Claims8
A vibration screen apparatus for classifying granular material comprising:
- an outer frame;
- an inner frame;
- a screen deck;
- resilient means mounting said screen deck on said inner frame;
- means suspending the inner frame and screen deck from the outer frame;
- means for vibrating said screen deck at a high frequency in a generally vertical plane;
- and
- means for applying a lower frequency motion to said inner frame and said screen deck in a generally horizontal plane.
5 more elements
A vibrating apparatus for classifying granular material comprising:
- an outer frame;
- an inner frame;
- a plurality of screen decks mounted on the inner frame;
- means suspending said inner frame and said plurality of screen decks from said outer frame;
- resilient means intermediate said plurality of screen decks and said inner frame and mounting the screen decks to said inner frame;
- means for vibrating at least one of said screen decks at a high frequency and in a generally vertical plane;
- and
- means for applying a low frequency motion to said inner frame and all of said screen decks in a generally horizontal plane.
5 more elements
Dependencies are inferred from the claim text.