Cutting by use of rotating axially moving tool – Tool or tool with support – Having axial – core-receiving central portion
Patent
1992-08-06
1993-07-13
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having axial, core-receiving central portion
408 68, 408209, B23B 5104
Patent
active
052267628
ABSTRACT:
A sealed, quick-disconnect, hole-saw arbor is disclosed for affixing a hole saw to a drill. The arbor enables a standard hole saw to be firmly "snugged up" to a shoulder on the arbor, and then rotated without being "backed off" the shoulder, in order to align drive holes in the hole saw with adjustable drive bosses on the arbor. In the preferred embodiments, the sealed hole-saw arbor produces a gravity-responsive, reversible, one-way lock effect on a threaded mounting sleeve. Letter indicators "T" and "L" on the arbor help the user position the arbor in a tighten or loosen position. Holding the arbor so that the "T" is upright, positions the arbor in the tighten position. The mounting sleeve is thereby secured against movement in a tighten direction and the hole saw is then threaded onto the sleeve and "snugged up" to the shoulder on the sleeve. The hole saw and mounting sleeve can next be rotated together in an opposed direction, to line up the drive holes in the hole saw with the adjustable drive bosses on the arbor, that are then moved into the hole saw to prepare it for use. To disconnect the hole saw, the arbor is held so that the "L", 180.degree. opposed to the "T", is upright. The mounting sleeve is thereby secured against rotation in a loosen direction, so that the hole saw can be unthreaded off of the sleeve.
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Holland Donald S.
Howell Daniel W.
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