Hole cutter

Details Hole cutter Hole cutter

1992-09-21

1994-05-31

Rosenbaum, Mark

Cutting by use of rotating axially moving tool

Tool or tool with support

With work-engaging structure detachable from cutting edge

408206, 408209, B23B 5104

Patent

active

053164180

ABSTRACT:
This disclosure relates to a hole cutter comprising a spindle having a rearward end shaped to be engaged and rotated by a drive machine, the spindle further having a front end and an axial center bore. A cylindrical blade is attached to the front end of the spindle. A centering pin is supported in telescopic relation within the center bore of the spindle, the pin engaging with the spindle to limit the forward movement of the pin relative to the spindle. A spring is supported in the center bore and urges the pin forwardly relative to the spindle to normally project a portion of the pin forwardly from the spindle and the blade. A center drill is attached to the front end of the spindle and projects forwardly from the blade, the drill having an axial center bore which receives the projected portion of the pin. The drill further has a bit attached to its front end.

REFERENCES:
patent: 4385853 (1983-05-01), Strange et al.
patent: 4408935 (1983-10-01), Miyanaga
patent: 4555203 (1985-11-01), Takahashi
patent: 5062748 (1991-11-01), Kishida
patent: 5171111 (1992-12-01), Kishimoto
Patent Abstracts of Japan--vol. 16, No. 346 (M-1286) Jul. 27, 1992 & JP-A-41 05 811 (Miyanaga: KK)--Abstract.

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