Title:
【発明の名称】岩盤ルーフボルト
Document Type and Number:
Japanese Patent JPH02503019
Kind Code:
A
Abstract:
PCT No. PCT/AT88/00097 Sec. 371 Date Jul. 11, 1989 Sec. 102(e) Date Jul. 11, 1989 PCT Filed Nov. 15, 1988 PCT Pub. No. WO89/04911 PCT Pub. Date Jun. 1, 1989.A rock bolt comprises a bolt rod secured in a borehole, a retaining plate attached outside the borehole, a bolt head for the retaining plate, and a supporting connection between the bolt rod and the retaining plate. The supporting connection comprises a tubular member adapted to be inserted into the bore hole, the tubular member having an outer end and an inner end, the outer tubular member end bearing on the retaining plate, and a compressively loaded, deformable and upsettable sleeve member accommodated with a clearance in the tubular member and held between a rodside thrust face and a plateside thrust face constituted by a collar adjacent the inner tubular member end.
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Inventors:
Calpels, Valter
Application Number:
JP50918388A
Publication Date:
September 20, 1990
Filing Date:
November 15, 1988
Export Citation:
Assignee:
My Radar Bow Holding Gezershyaft Mitz Besien Renkel Haftsung
International Classes:
E21D21/00; E21D20/00; (IPC1-7): E21D20/00
Domestic Patent References:
| JPS533606U | 1978-01-13 | |||
| JPS603377U | 1985-01-11 |
Attorney, Agent or Firm:
Toshio Yano (3 outside)