Patent ID: 6073979
Filing Date: 2000-06-13
Classification: B07B,Y10S,Y10T

Abstract:
A screening machine having a screen box and a removable cover releasably secured to the screen box by a plurality of clamps, each of the clamps comprising:a toggle assembly mounted to one of the cover and the screen box;a support bracket mounted to the other of the cover and the screen box;a plurality of spaced clamping positions on the support bracket each of which is adapted to receive and hold a portion of the toggle assembly, the toggle assembly engaging the support bracket at one of the plurality of clamping positions to thereby releasably secure the cover to the screen box, whereby the clamp provides a different clamping force corresponding to the different clamping positions engageable by the toggle assembly;a secondary clamping force adjustment mechanism which provides for adjustment of the clamping force of the clamp irrespective of which of the clamping positions is engaged by the toggle mechanism.