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The pitman may be made lighter as the known pitman by a honeycomb structure continuing above the joint point of the toggle plate. In some embodiments, the fixing point is taken from such a distance from the joint point in which point the height of the web is 80-90% of the maximum height of the web. Additionally, the lower part of the pitman is a firm honeycomb structure, to the connection areas of which strength-increasing roundings are made.In the solution of the pitman, strength advantage is achieved when the force of the toggle plate is received on a nearly parallel plate flange (lower and upper back wall area) which continues above the joint point to a sufficient distance for minimizing bending and pulling tensions. The desired loading level of the crusher/pitman and the life span as well as the fixing points of the wear parts define the dimensions of the pitman which further define the size of the distance. According to some embodiments, the openness of the cross-sectional profile of the pitman is changed in a strength-wise sufficient distance from the joint point between the toggle plate and the pitman. The height of the web is measured as a perpendicular distance from the front surface of the lower part of the pitman to the outer curve of the web.
The figure shows separate graphs for crushed material with grain sizes of smaller than 4 mm, 4 to 10 mm, and greater than 10 mm. 4 shows, in a corresponding manner, graphs illustrating how the production of the crusher depends on the cycle frequency of the crushing cone 4.FIG. From the figure, it can be seen that the production reduces as the cycle frequency of the crushing cone 4 increases. Also this correlation is substantially linear.
Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof.
Gerber JD, Knoepfel P, Nahrath S, Varone F (2009) Institutional resource regimes: towards sustainability through the combination of property-rights theory and policy analysis. Ecol Econ 68(3):798–809.
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