Title:
【発明の名称】地中穿孔装置
Document Type and Number:
Japanese Patent JPH02503214
Kind Code:
A
Abstract:
A device for making wells in the ground comprises a striking mechanism (1), a cylindrical casing (15) provided in its upper part with a flange (16) and with an inclined surface (17) located below the flange (16). A cap (18) with a through opening (27) is mounted on the cylindrical casing (15) with the possibility of rotation. The lower part of the cap (18) is located above the lower end face of the cylindrical casing (15). The cap (18) interacts with a bushing (19) mounted on the cylindrical casing (15) and split by planes into wedge-shaped supports (20) interacting with the inclined surface (17) of said casing (15) and into segments (21) spring-loaded in relation to the cylindrical casing (15) and contacting with the wedge-shaped supports (20). The wedge-shaped supports (20) and the segments (21) of the split bushing (19) are fixed in the cap (18) with the possibility of rotation in radial planes.
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Inventors:
Syriamin Nikolai Dmitrievich
Gileta Vladimir Pavlovich
Grigora Schenko Vladimir Alexandrovich
Rayfisov Yury Borisovic
Ruthin Evgeny Pavlovich
Gileta Vladimir Pavlovich
Grigora Schenko Vladimir Alexandrovich
Rayfisov Yury Borisovic
Ruthin Evgeny Pavlovich
Application Number:
JP50558988A
Publication Date:
October 04, 1990
Filing Date:
February 03, 1988
Export Citation:
Assignee:
Institut Gornogo de la Civilskogo Oto de Renia Academia Nauk SSS
International Classes:
E21B1/00; E21B1/30; E21B4/14; E21B7/26; (IPC1-7): E21B7/26; E21C3/24
Attorney, Agent or Firm:
Minoru Nakamura (7 outside)