Title:
POSITIVE MOTION FEEDING DRILL
Document Type and Number:
Japanese Patent JPS53145187
Kind Code:
A
Abstract:
The improved locking means includes a pair of shaft mounted gears that are in mesh with the thread on the exterior of the feed screw mounted in the housing of a positive feed drill. On the opposite ends of the shafts are mounted gears which rotate with the shafts. When the drill tool holder is not to be advanced, the gears and shafts rotate as the feed screw is being rotated and thus do not cause axial movement of the feed screw as the feed screw rotates. A rack gear is located in the housing adjacent the spur gears. A pressure actuated piston is provided to move the rack gear into engagement with the spur gears to lock the spur gears and shafts against rotation. When this occurs, the gears in mesh with the thread on the feed screw act as a fulcrum so that the feed screw and tool holder are moved axially as the feed screw rotates.
Inventors:
ROBAATO FURANKURIN GORUWAZU
HAAMAN JIYOOJI FUEERUSUTEIN
HAAMAN JIYOOJI FUEERUSUTEIN
Application Number:
JP6156678A
Publication Date:
December 18, 1978
Filing Date:
May 23, 1978
Export Citation:
Assignee:
DRESSER IND
International Classes:
B23B47/18; B23Q5/32; B23Q5/40; (IPC1-7): B23B47/18
Domestic Patent References:
| JPS5021381A | 1975-03-06 |