Impact wrench mechanism and pivot clutch therefor

Details Impact wrench mechanism and pivot clutch therefor Impact wrench mechanism and pivot clutch therefor

B - Operations, Transporting

25

B

81/21

B25B 21/02 (2006.01) B25D 15/02 (2006.01)

Patent

CA 1138692

IMPACT WRENCH MECHANISM AND PIVOT CLUTCH THEREFOR ABSTRACT OF THE DISCLOSURE This invention pertains to a rotary impact tool and a clutch therefor, wherein a motor drives a carrier cage or member within which is pivotally mounted one or more swinging hollow hammer members. An output shaft extends through the carrier member and through the hollow hammer member and includes forward and reverse impact anvil surfaces. The hammer member is, or members are, mounted to swing in respect to the carrier member as the hammer member(s) rotate(s) with the carrier member, and carries forward and reverse impact jaws on its internal surface. As the clutch is driven in the forward direction by an air motor or the like, the forward impact jaw is moved in and out of the path of the anvil jaw on the output shaft by cam action, and during an impact blow the inertia of the rotating hammer member(s) act automatically to hold the impact jaw in engagement with the anvil jaw.

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