| 摘要 |
A noise suppression coupler (18) connecting a first drill steel section (16) in a driving relationship to a second drill steel section (16) in a rotatable cutter assembly (10). The coupler includes an elongate body (20) having an axial forward end and an axial rearward end, and the elongate body containing a longitudinal bore (32), a collar (26) mediate of the forward and rearward ends, a forward body portion (28) axially forward of the collar configured to drivingly engage the first member (16) and a rearward body portion rearward of the collar wherein the rearward body portion is configured to drivingly engage the second member (16). The rearward body portion of the elongate body includes an elastomeric layer (34) formed thereon. ~~cI co CD e, 4 Il / 4o I IC/ CDo Coc CCY, |
