Drilling tool

Details Drilling tool Drilling tool

1991-12-26

1992-12-15

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With product handling or receiving means

408201, 408204, 408703, B23B 504

Patent

active

051711117

ABSTRACT:
A drilling tool comprises a holder unit adapted to be detachably mounted to a hand-held drive unit, and a hole saw unit detachably mounted to the holder unit, the hole saw unit including, as a unit, a cylindrical cutter and a center pin, the holder unit including, as a unit, a spring and a slider disposed to allow reciprocating motion of the center pin, whereby the drilling tool is able to constantly form an appropriate hole in a workpiece such as a thin iron plate, a thick iron plate, or a pipe having a round surface, and expandable components of the drilling tool are formed as a unit to allow for ready replacement.

REFERENCES:
patent: 3825362 (1974-07-01), Hougen
patent: 4295763 (1981-10-01), Cunniff
Kansai Kogu Mfg. Co., Ltd., Hole Saw, (brochure), undated.

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