Fixture for drilling a longitudinal hole in a door

Details Fixture for drilling a longitudinal hole in a door Fixture for drilling a longitudinal hole in a door

1997-04-25

1998-08-11

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Processes

Bit detachable

408 97, 408103, 408115R, 408241G, B23B 3900

Patent

active

057918341

ABSTRACT:
A door drilling fixture for drilling a long straight longitudinal hole in a door. The fixture includes an elongated frame having a U-shaped cross-section for mounting about the hinged edge of a door and an arm projecting from and pivotally engaged to the frame for guiding a long drill bit. The door is placed between the right and left sections and the door edge flat against the center section of the U-shaped frame. Two hold-down bolts thread through upper and lower portions of the left section of the U-shaped frame to press the door against the right section of the U-shaped frame. Slots in the frame mechanically isolate the upper and lower portions of the left section from the middle portion of the center section. The arm houses two spaced apart drill bushings having a center line for rotationally engaging and guiding the drill bit through the drill bit aperture and into the edge of a door. The pivot line between the arm and the frame intersects the center line of the drill bushings, thereby enabling the arm to be pivoted for changing the inclination of the drill bit without changing the entry point of the drill bit on the door jamb edge.

REFERENCES:
patent: 3552239 (1971-01-01), Yeaman et al.
patent: 3598496 (1971-08-01), Skinner
patent: 3626513 (1971-12-01), Pytlak
patent: 3864053 (1975-02-01), Harwood
patent: 4331411 (1982-05-01), Kessinger et al.
patent: 4865496 (1989-09-01), Challis
patent: 4948304 (1990-08-01), Kobayashi
patent: 4978257 (1990-12-01), Nowman

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