Improvements in rock bolts

Details Improvements in rock bolts Improvements in rock bolts

E - Fixed Constructions

21

D

E21D 21/00 (2006.01) B21K 1/44 (2006.01) B21K 1/54 (2006.01) B21K 1/56 (2006.01) B23G 9/00 (2006.01) F16B 39/28 (2006.01)

Patent

CA 2142894

2142894 9500744 PCTABS00035 A rock bolt (1) including an elongated body (3) with an externally threaded portion (2) at one end for the free running passage of a nut, except for an interference zone (12) part way along the length of the thread (2) for the forced threaded passage of the nut.

Boulon d'ancrage (1) constitué d'une tige allongée (3) présentant un secteur externe fileté (2) à une extrémité, destiné au libre passage d'un écrou, sauf sur une zone de sur-mesure (12) ménagée sur une partie de la longueur du filetage (2) afin de résister au passage du boulon.

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