Solid material comminution or disintegration – Processes – Miscellaneous
Reexamination Certificate
2008-01-22
2010-10-19
Francis, Faye (Department: 3725)
Solid material comminution or disintegration
Processes
Miscellaneous
C241S037000, C241S207000
Reexamination Certificate
active
07815133
ABSTRACT:
A crushing and reducing device, especially cone crushers, used in the building and ore-dressing industries. A method includes providing a crusher with proximity sensors and a disc rigidly secured to the unbalanced-mass vibration generator of the crusher such that the plane thereof is always perpendicular to the rotation axis of the vibration generator. The method includes measuring a distance to the disc, calculating the three-dimensional position of the disc plane, calculating the amplitude of the circular vibrations of the internal cone according to the position, calculating the size of a crushing gap according to the calculated amplitude, comparing the size with the specified parameter of the gap and, if required based on comparison results, outputting a control command to hydraulic cylinders to modify the position of an adjustment ring. The adjustment ring position is controlled by a proximity sensor which is mounted on the flange of a body top part.
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L.A. Vaisberg et al., “Studies of Methods for Controlling Process Factors of Cone Inertial Crushers,” Vibratory Crushers, Vsegei Publishers, Saint-Petersburg, Chapter 9, 2004, pp. 128-140.
Drinker Biddle & Reath LLP
Francis Faye
Sandvik Intellectual Property AB
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