Impactor drill tool
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 16, 1982
Grant Date -
N/A
app pub date -
Jul 21, 1980
filing date -
Jul 21, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rock drill apparatus has features that allow it to be attached to a conventional impact tool. The rock drill attachment has a housing that is secured to the impact tool carriage below the hammer of the impact tool. A tappet is carried in the housing of the rock drill attachment for axial movement in response to blows from the hammer. The tappet is nonrotatable with respect to the housing and is adapted to deliver blows to a tool shank. A conversion device is coupled between the tappet and the tool shank to convert downward movement of the tappet into rotation of the tool shank prior to the impact of the tappet on the tool shank. A spring moves the tappet away from the tool shank after impact for repeating the cycle. The conversion device includes a sleeve with inclined splines that engage inclined splines on the tool shank. A clutch locks the sleeve to the tappet during downward movement to rotate the tool shank. During upward movement, the clutch allows the sleeve to rotate with respect to the tappet.
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Cited Art Landscape
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