专利名称：Screw extracting device 发明人：Douglas S. Marling
申请号：US05/929899
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申请日：19780801
原创散文
公开号：US04204308A
公开日：
北京夜大螺丝刀英文19800527latern>limitless
专利内容由知识产权出版社提供
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摘要：A screw extracting device is provided for removing screws which cannot be removed with an ordinary screwdriver. The device compris an elongate rod, a handle located at one end of the rod, a plurality of gripping fingers located at the other end of the rod for gripping the screw to be extracted a sleeve, threaded for movement along the rod, for controlling contraction and expansion of said gripping fingers in accordance with the longitudinal position of said sleeve along the rod so as to provide gripping and relea of the screw head. The fingers each include a tapered tip portion which permits the fingers to be driven into the surface surrounding the head of the screw to be extracted and gripping ridges or the like for providing firm gripping of the screw head. A method of using the device is also enclod.
申请人：MARLING, DOUGLAS S
pond杭州培训>彩虹的拼音代理机构：Larson, Taylor and Hinds
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