| 摘要 |
1435246 Fastener driving tool HILTI AG 19 Aug 1974 [27 Sept 1973] 36340/74 Heading B4C An explosively driven fastener mating tool comprises a barrel 2 spring urged outwardly and which has to be pressed in by the surface into which the fastener is to be inserted and sensing members 9 pivotable about axes 8 which allow complete retraction of the barrel and hence firing only if they are all pivoted so that their respective ends 10 do not abut a projection 11 on the barrel. All the sensing members are urged into the position shown by a spring 12. |
