公开(公告)号：AU1903992A

公开(公告)日：1992-11-17

申请号：AU1903992

申请日：1992-04-16

Applicant: THE INGERSOLL-RAND COMPANY

Inventor： LELAND H. LYON ,  ROBERT R. KIMBERLIN

IPC: B25D16/00 ,  E21B6/06 ,  F16D41/20

Abstract: A clutch assembly transmits rotary motion in a percussive apparatus to a drill steel. The clutch assembly includes a first hub having a first cylindrical surface formed thereon. A second hub which is substantially rotationally coupled to the drill steel, has a second cylindrical surface formed thereon. The second cylindrical surface is coaxial with the first cylindrical surface. A wrap spring engages a portion of both the first cylindrical surface and the second cylindrical surface, wherein relative rotary motion between the first hub and the second hub is permitted in a first direction and restricted in a second direction. The wrap spring clutch transmits motion supplied from a rifle bar assembly as well as a plunger bar arrangement.