Reciprocating drill feed control rod holding means

Details Reciprocating drill feed control rod holding means Reciprocating drill feed control rod holding means

1984-01-20

1985-08-13

Briggs, William R.

Cutting by use of rotating axially moving tool

Including means to cause tool to progressively vibrate...

188 67, 267125, B23B 4722

Patent

active

045346836

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.

REFERENCES:
patent: 3320862 (1967-05-01), Wright
patent: 3609054 (1971-09-01), Nyman
patent: 3643765 (1972-02-01), Hanchen
patent: 3680970 (1972-08-01), Deschner
patent: 3812766 (1974-05-01), Weiss
patent: 4214795 (1980-07-01), Kakuminato
patent: 4236609 (1980-12-01), Carlsson

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