| 摘要 |
A set of ripping teeth secured to a bulldozer blade in either a deployed or undeployed position. The teeth project from a pair of integrally formed support frames with the upper edge of each frame terminating in respective tubular mounting sleeves. Mounting pin project from the outer ends of the mounting sleeves, and a mounting shaft extends between the inner ends of the mounting sleeves. The mounting pins and the mounting shaft are fixedly received by the mounting sleeves, and they are slidably received by spaced apart hangers which are releasably secured to the blade through blade mounted brackets. In its deployed position, the frames extend downwardly along the front of the blade with the teeth projecting beyond the lower edge thereof. As the bulldozer moves forwardly with the blade lowered, the teeth perform a ripping function in the same manner as teeth which are rigidly secured to the blade. However, as the bulldozer moves rearwardly, the teeth and frames swing forwardly in a floating motion to allow the blade to perform a scraping function while preventing the teeth from fracturing. In its undeployed position, the frame is pivoted to an upwardly projecting position where it is secured in place by a pair of locking hooks releasibly secured along the upper edge of the blade.
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