Wrap spring clutch for percussive apparatus

Details Wrap spring clutch for percussive apparatus Wrap spring clutch for percussive apparatus

B - Operations, Transporting

25

D

B25D 16/00 (2006.01) E21B 6/06 (2006.01) F16D 41/20 (2006.01)

Patent

CA 2105080

2105080 9218784 PCTABS00017 A clutch assembly (16) transmits rotary motion in a percussive apparatus (10) to a drill steel. The clutch assembly (16) includes a first hub (18) having a first cylindrical surface (24) formed thereon. A second hub (20) which is substantially rotationally coupled to the drill steel, has a second cylindrical surface (26) formed thereon. The second cylindrical surface (26) is coaxial with the first cylindrical surface (24). A wrap spring (17) engages a portion of both the first cylindrical surface (24) and the second cylindrical surface (26), wherein relative rotary motion between the first hub (18) and the second hub (20) is permitted in a first direction and restricted in a second direction. The wrap spring clutch (16) transmits motion supplied from a rifle bar assembly as well as a plunger bar arrangement.

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