Double-sided hole saw

Details Double-sided hole saw Double-sided hole saw

1994-06-06

1995-05-09

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Processes

Bit detachable

408 80, 408204, 408209, B23B 3500, B23B 5104

Patent

active

054134374

ABSTRACT:
A double arbor has a shaft with a slideable first arbor at one end and a fixed second arbor at the other. A first hole saw of the already-cut, incorrect diameter is mounted on the first arbor. A second hole saw which is the size of the desired diameter hole is mounted on the second arbor. The assembly is attached to a drill or other rotating driving means and the first hole saw is placed into the existing opening where it acts as a pilot bit for the second hole saw. Use of the first hole saw as a pilot can also be applied to rabbeting, bevelling, grooving or sanding the existing hole by attaching different blades in place of the second hole saw.

REFERENCES:
patent: 2725766 (1955-12-01), Van Heuhelom
patent: 3550229 (1970-12-01), Zenses
patent: 4380990 (1983-04-01), Giardini
patent: 4541758 (1985-09-01), Frank et al.
patent: 4968189 (1990-11-01), Pidgeon

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