公开(公告)号：EP1015185A1

公开(公告)日：2000-07-05

申请号：EP98923822.5

申请日：1998-05-28

Applicant: INGERSOLL-RAND COMPANY

Inventor： COOPER, Timothy, R. ,  LOW, Thomas, P.

IPC: B25B21/00

CPC classification number: B23Q17/24 ,  B23Q5/027 ,  B23Q5/10 ,  B25B21/02 ,  B25B23/14

Abstract: Disclosed is a low reaction oscillating mass-based torquing tool (1) wherein an oscillating mass (4) is excited into near resonant oscillation by reversing pulses resulting in increased oscillation about a torsion spring (3) to the point where the torque associated with the energy stored in the torsion spring exceeds the torque required to further tighten a fastener and the torque released from the torsion spring tightens the fastener while a biasing torque assures application of the released torque in the tightening direction only.