Delayed compression sleeve hammer

Details Delayed compression sleeve hammer Delayed compression sleeve hammer

2006-05-19

2008-09-09

Rada, Rinaldi I. (Department: 3721)

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

C173S013000, C173S078000

Reexamination Certificate

active

07422074

ABSTRACT:
A sleeve carried by and preferably slidable relative to the piston, for controlling air passages associated with a central air feed tube, whereby retraction pressure is applied to the piston substantially at impact. It is the impact itself of the piston against the bit, which enhances sliding of the sleeve relative to the piston, over the feed tube, and thereby switches the airflow at the moment of impact.

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