Rock drilling apparatus with noise reducing drill rod cover

Details Rock drilling apparatus with noise reducing drill rod cover Rock drilling apparatus with noise reducing drill rod cover

F - Mech Eng,Light,Heat,Weapons

01

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172/19, 255/31

F01N 1/16 (2006.01) B23Q 11/08 (2006.01) E21B 1/00 (2006.01) E21B 19/084 (2006.01)

Patent

CA 1064470

ABSTRACT OF THE DISCLOSURE A rock drilling apparatus has a noise reducing rod cover which comprises a pair of elongated strips, each of which, when in an extended condition in the longitudinal direction thereof, form part-cylin- drical members which matingly engage the other strip to form a generally cylindrical cover around the drill rod. Spool means is provided, preferably in the area of the centralizer, to selectively roll the elongated strips thereon, the strips being flattened when rolled onto the spool means. The elongated strips are rolled onto simultaneously driven spools, and comprise either metallic strips, metallic strips covered with rubber on one or both surfaces thereof, of flexible strips having spaced metallic inserts embedded therein.

283022

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