Abstract: A high-speed crushing apparatus comprising two cutting edges one of which is stationary-type and the other rotary-type, a crusher disposed downstream of the edges including a shaft facing the rotary-type cutting edge and a plurality of cutters attached rotatably in the rotation axis direction and slidably to the shaft, and a guide plate disposed therebetween. The guide plate delivers fragments before the cutters and they are cut at a cutting angle determined by the position of the end surface of the guide plates. The apparatus is used suitably for disposal of scrap woods of various sizes and hardness.

Abstract: A driving belt for stepless speed variation capable of smoothly traveling and accomplishing power transmission with high efficiency. The driving belt includes an endless metal strip consisting of a plurality of first metal strip elements and a second metal strip element formed into a length larger than the first metal strip elements, a plurality of blocks each provided at a center of an upper portion thereof with a groove through which the endless belt is fittedly inserted and having both side surfaces in a direction of advance of the driving belt curved, and a plurality of pins each arranged so as to extend across the groove of the block. The second metal strip element is formed into a corrugated shape, resulting in exhibiting elastic force and the both side surfaces each are formed so as to have a center of curvature defined at an intermediate position of a depth of the groove, so that the blocks adjacent to each other may abut against each other near the metal strip.