Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Frictionally engaging sides of opening in work
Patent
1989-04-07
1990-11-13
Bilinsky, Z. R.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Frictionally engaging sides of opening in work
408115B, 408 97, 408112, B23B 4100
Patent
active
049697811
ABSTRACT:
A hand tool for the preparation of an off-set bore relative to a countersunk recess in a structural plate member wherein a pilot sleeve with a central bore slidably support an upper hollow sleeve that is spring biased away from the pilot sleeve. A bushing secured to the upper portion of said hollow sleeve also retains a drill bit that extends in to the pilot sleeve while the shank end is connectable to a drill for rotation and axial movement with the hollow sleeve relative to the pilot sleeve to drill a through bore in the plate member whose axis is off-set relative to a tapered countersunk conical recess in the plate member. The lower end of the pilot sleeve has a tapered annular surface or conical recess whose central axis is off-set relative to the axis of the central bore of said pilot sleeve, and a handle is secured to the pilot sleeve to position and hold the hand tool in the countersunk recess of the plate member as it is drilled.
REFERENCES:
patent: 2224480 (1940-12-01), Kartarik
patent: 2294303 (1942-08-01), Jagow
patent: 2670637 (1954-03-01), Whitechester
patent: 2674906 (1954-04-01), Timpner
patent: 2792726 (1957-05-01), Vick
patent: 2830377 (1958-04-01), Wenz
patent: 3540322 (1970-11-01), Swanson
Betchel Thomas S.
Fahrner Alan J.
Bilinsky Z. R.
Januszkiewicz Joseph
Schultz R.
The B. F. Goodrich Company
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