Cutting by use of rotating axially moving tool – Tool or tool with support – Having product-receiving chamber
Patent
1986-04-25
1988-05-03
Weidenfeld, Gil
Cutting by use of rotating axially moving tool
Tool or tool with support
Having product-receiving chamber
125 20, 144 23, 408204, 408703, B23B 3104
Patent
active
047416513
ABSTRACT:
An improved hole saw is disclosed. A mandrel of the hole saw forms an elongated threaded body. The mandrel, at a first end forms a shank adapted to be secured in the chuck of a hand power drill or drill press. The second end of the mandrel forms an enlarged, radially extended, circular flange having a recessed axially aligned hole formed therein. The shank end of, for example, a quarter inch pilot-hole drill is secured in the flanged end of the mandrel by one or more set screws. The mandrel is inserted, shank end first, into the open serrated cutting end of a cylindrically shaped hole saw. The threaded shank end of the mandrel is screwed into a threaded base of the hole saw, the radially extended flange of the mandrel being mated to and tightened against the inside base end of the hole saw. By inserting the mandrel through the cutting end of the hole saw and threading it tightly against the base of the saw, it now is convenient to remove sawn plugs contained by the cylindrical hole saw by simply threading the mandrel back out of the hole saw towards the circular cutting end of the saw. A left-hand threaded mandrel and hole saw base will assure that the mandrel will remain secured within the hole saw during use.
REFERENCES:
patent: 1596197 (1926-08-01), Lindgren
patent: 3390596 (1968-07-01), Trevathan
patent: 3647310 (1972-03-01), Morse
patent: 3648508 (1972-03-01), Hougen
patent: 3758221 (1973-09-01), Meshulam
patent: 3837759 (1974-09-01), Bihern
patent: 3854840 (1974-12-01), Miyanga
patent: 4422811 (1983-12-01), Ellison et al.
Ekstrand Roy A.
Webb Glenn L.
Weidenfeld Gil
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