发明名称 |
PATRONLADDAD STENSPRECKARE |
摘要 |
At the lower end of the pipe inserted in the borehole is a renewable sealing mechanism, (14) whilst at its upper end is supported a heavy counterweight (3) and a release (1) which acts as an impulse reflector when a cartridge is exploded. In accordance with the arrangement the breaking force is produced at the lower end of the borehole. The pressing together process which inhibits breaking and which occurs with customary downwardly directed wedge driving is avoided and is replaced instead by an outwards and upwards directed effective breaking effect. |
申请公布号 |
SE8500300(D0) |
申请公布日期 |
1985.01.23 |
申请号 |
SE19850000300 |
申请日期 |
1985.01.23 |
申请人 |
LARS JOHAN MARTIN * SJOLUND |
发明人 |
LARS JOHAN MARTIN * SJOLUND |
分类号 |
B25D9/11 |
主分类号 |
B25D9/11 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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