Peck feed drilling machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 17, 1991
Issued Date -
N/A
app pub date -
Oct 24, 1990
filing date -
May 24, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A peck feed drilling machine incorporates a pneumatically operated vane motor and peck feed components. The vane motor drives a conventional drill bit through a speed reducing gear train. The peck feed assembly includes a plurality of multi-state shuttle valves which cooperate with a drilling feed piston, a peck piston and a clutch assembly to incrementally advance and fully retract the drill bit to peck drill an aperture. The drilling machine also includes a dashpot which adjusts the feed rate of the drill bit, a second dashpot for slowing the drill bit as it breaks through the workpiece and countersinks, a threaded mechanism for adjusting the depth of drilling and a spring mechanism for slowing the advance of the drill bit just before it engages the workpiece.
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