专利名称：Method and apparatus for prenotching a
pipeline
发明人：William B. Smith申请号：US06/221883申请日：19810102公开号：US04370995A公开日：19830201
摘要：The wall of a pipe is prepared for a subsequent cutting operation by a double-edged shear plate, by cutting axially spaced circumferential notches in such wall with aflexible strand cutter capable of operating in the limited confines of a housing designedin the rectangular pattern of the shear plate. The flexible strand cutter advantageouslyemploys roller cutters on a power transmission type chain which is tensioned against andmoved circumferentially over the wall of the pipeline.
申请人：THE PIPE LINE DEVELOPMENT CO.
代理机构：Pearne, Gordon, Sessions, McCoy & Granger
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容