Reciprocating drill feed control rod holding means
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United States of America Patent
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-
Aug 13, 1985
Grant Date -
N/A
app pub date -
Jan 20, 1984
filing date -
Jan 20, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A holding or checking means for holding the control rod of a reciprocating drill feed control apparatus in position after each advancing movement of an automatic drilling machine during a 'peck drilling' operation. The holding means includes a cylindrical body adapted to be fastened over the end of a drill feed control apparatus and with the control rod of the feed control apparatus extended through said body. A pair of pivotally mounted yoke arms are mounted on a cylindrical body and have semi-circular recesses adapted for friction holding engagement with the feed control rod to hold it in an advanced position when the reciprocating drill apparatus is retracted. The holding means includes a biasing means for biasing the yoke arms into friction engagement against the control rod. The holding means includes a fluid operated piston for selective movement into engagement with the yoke arms for releasing the yoke arms from a friction engagement with the control rod to permit the control rod to be moved by the feed control apparatus to an initial operating position.
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