Cyclic drilling machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 20, 1983
Grant Date -
N/A
app pub date -
Oct 23, 1981
filing date -
Oct 29, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drilling machine provided with a feed control device. The feed control device includes a hydraulic cylinder to be engaged with a quill, which is reciprocated by a pneumatic feed device, on the forward midway thereof, a slidable member disposed on a frame in such a manner as to be able to move by a predetermined distance in the movement direction of a ram of the hydraulic cylinder, and coupling device retained on the slidable member for linking the slidable member and the ram. When the quill is once returned backwards in the course of a drilling cycle the ram is also returned backwards together with the slidable member by the predetermined distance, and when the quill is moved forward again the quill is engaged with the ram at a position a little short of the position where the previous drilling cycle was interrupted for being switched there from rapid speed down to slow speed.
First Claim
Family
International Classification(s)
Cited Art Landscape
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