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US 5,398,816 AGranted
Fine mesh screening
AssigneeSweco, Incorporated
InventorNagabhusan Senapati
Life of this patent
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Abstract
A screening system having a resiliently mounted frame with a screen extending thereacross. The frame is vibrated by a low frequency vibratory drive using eccentric weights. About the peripheral frame of the screen, a high frequency drive or drives is employed to vibrate the screen in the range of 20,000 Hz. The high frequency vibration is generated at the peripheral frame about the screen. The screen is responsive to the high frequency vibrations in a plate-like manner rather than as a membrane.
Claims11
A screening system comprising
- a resiliently mounted frame;
- a low frequency vibratory drive coupled to said frame to vibrate said frame;
- a screen stiffened as to bending extending across said frame and including a screen frame;
- a high frequency drive coupled to said screen frame to vibrate said screen frame above about 10,000 Hz;
- resilient elements between said frame and said screen frame to isolate high frequency vibrations to said screen, said resilient elements including resilient gasket material extending fully between said frame and the upper and lower surfaces of said screen frame to isolate said screen from said frame.
2 more elements
Dependencies are inferred from the claim text.