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    • 2. 发明专利
    • A tool for use in removing tubes from boilers
    • GB225100A
    • 1924-11-27
    • GB494524
    • 1924-02-26
    • EDWARD RICHARD CRISPACHILLES SANTIN
    • B25B27/00
    • 225,100. Crisp, E. R., and Santin, A. Feb. 26, 1924. Tube extractors.-A tool for use in removing tubes from boilers consists of a number of jaws 5 pivotally mounted in a body 4 and rocked by a cone 7 engaging their tapered inner ends so that, when the jaws engage the ends of a tube and the cone is operated, the tube is compressed inwardly at a number of points corresponding with the number of jaws in the tool. This operation is repeated at different points on the tube until the joint at one end of the tube is collapsed, the operation being repeated at the other end prior to the withdrawal of the tube. The body part 4 is cylindrical and has recesses in which the jaws 5 are mounted on pins 6. A screw-threaded bolt 9, engaging a nut 10 fixed in the rear end of the body 4, has its head 13 rotatably seated in the cone 7 which is slidably mounted in the body 4 and is operated to rock the jaws by turning the screw 9. The outer ends of the jaws are preferably slotted so as to engage the end of the boiler tube.