Hole saw having plug ejection feature

Details Hole saw having plug ejection feature Hole saw having plug ejection feature

1994-08-05

1995-07-25

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With product handling or receiving means

Ejector

408204, B23B 5105

Patent

active

054356725

ABSTRACT:
A hole saw having plug ejection feature. Using the arbor and arbor nut of the present invention, the arbor of an ordinary commercially available hole saw is replaced, the arbor nut of the present invention being threaded into the hole saw cup axial threaded inlet, to convert the ordinary hole saw into a plug ejecting hole saw. The arbor and arbor nut of the plug ejecting hole saw of the present invention function as the arbor of an ordinary hole saw when used with to drill the desired hole, the drill turning in a clockwise direction. When the drill rotation is reversed to a counter clockwise direction and the hole saw cup is held stationary, the arbor of the present invention screws through the also stationary arbor nut, thereby ejecting the plug from the hole saw cup.

REFERENCES:
patent: 4030560 (1977-07-01), Clark et al.
patent: 4741651 (1988-05-01), Despres
patent: 4968189 (1990-11-01), Pidgeon
patent: 5035548 (1991-07-01), Pidgeon
patent: 5076741 (1991-12-01), Littlehorn
patent: 5082403 (1992-01-01), Sutton et al.
patent: 5096341 (1992-03-01), Despres

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