Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1996-06-10
1998-05-12
Graysay, Tamara L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
405154, 175296, 173 90, E02F 510, E21B 414, B25D 900
Patent
active
057496773
ABSTRACT:
The present invention relates to building and to mining, more particularly o an apparatus for impact action designed for trenchless laying of new underground communications and for reconstruction of existing communications, the apparatus comprising a body, a striker with a through central channel, the striker positioned inside the body with the possibility of performing reciprocal movement, a front chamber formed between the body and striker, a rear chamber formed between the body and the striker, an air distribution system comprising channels for the inlet of compressed air into the chambers and channels for the exhaust of spent air from the chambers, an air conduit, and in which in accordance with the invention the air distribution system is provided autonomously for each of the aforesaid chambers.
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Fetisov Sergei Jurievich
Grigoraschenko Vladimir Alexandrovich
Kamensky Veniamin Viktorovich
Klimenko Vladimir Alexeevich
Kurlenya Mikhail Vladimirovich
Graysay Tamara L.
Hartmann Gary S.
Institut gornogo dela Sibirskogo otdelenia Rossiiskoi Akademii n
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