Safe drilling rig

Details Safe drilling rig Safe drilling rig

1984-12-19

1990-12-18

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Movable relative to tool along tool-axis

408115R, 408137, B23B 4728

Patent

active

049782576

ABSTRACT:
A drilling rig for boring holes in the door of a combination safe includes a bracket for clamping the rig to the door of the safe, an upstanding U-shaped drill frame carried by the clamping bracket and a bearing assembly including a drill shaft journaled for rotation in an elongate outer barrel having internal thrust bearings. Axial movement of the entire bearing assembly is effected by rotating the barrel against mating threads carried by the drill frame. Thrust loads are distributed from the bearing assembly, through the drill frame and clamping bracket to the safe. A chuck is provided for fixing a drill bit to the inner end of the drill shaft. This insulates the motor used to rotate the drill shaft from all thrust loads.

REFERENCES:
patent: 2813439 (1957-11-01), Gracon
patent: 4090805 (1978-05-01), Grimsley
patent: 4197041 (1980-04-01), Prewitt
patent: 4533284 (1985-08-01), Agius et al.

Affiliated with

Also associated with

Rating

Safe drilling rig does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safe drilling rig, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safe drilling rig will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1422817