Spring loaded automatic plug ejector or hole saws

Details Spring loaded automatic plug ejector or hole saws Spring loaded automatic plug ejector or hole saws

1996-06-27

1997-11-25

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

408206, 408703, B23B 5104

Patent

active

056904525

ABSTRACT:
A spring loaded automatic plug ejector for hole saws which utilizes a spring 50 which is increasingly compressed while a hole is being drilled. Once the hole is drilled, the spring 50 decompresses and ejects the plug from the hole saw. The amount of spring tension applied to the plug is adjusted by varying the degree to which the spring is compressed.

REFERENCES:
patent: 1231551 (1917-07-01), Alexander
patent: 1234467 (1917-07-01), Hamilton
patent: 2435648 (1948-02-01), Frevel
patent: 3180018 (1965-04-01), Hougen
patent: 3267975 (1966-08-01), Enders
patent: 3390596 (1968-07-01), Trevathan
patent: 4755087 (1988-07-01), Parent
patent: 5076741 (1991-12-01), Littlehorn
patent: 5082403 (1992-01-01), Sutton et al.
patent: 5108235 (1992-04-01), Czyzewski
patent: 5226762 (1993-07-01), Ecker
patent: 5435672 (1995-07-01), Hall et al.

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