One step square hole drill bit

Details One step square hole drill bit One step square hole drill bit

1990-06-06

1991-03-19

Bishop, Steven C.

Cutting by use of rotating axially moving tool

Combined cutting means

Plural other type cutting means

144 69, 144 82, B23B 5108

Patent

active

050006282

ABSTRACT:
A new square hole cutter is designed so as to be as compact as possible with minimal clearance space between each individual component. The rotating cutting gears are one piece items that attach to a central hub. The drive shaft and central drive gear are disposed through the central hub. The central drive gear is removable by pulling it over the drive shaft, thereby allowing the drive shaft to quickly removed. The whole cutting unit is easily and quickly assembled and disassembled.

REFERENCES:
patent: 297013 (1884-04-01), Rothschild
patent: 461666 (1891-10-01), Charlton
patent: 518262 (1894-04-01), Meggenhofen et al.
patent: 1499561 (1924-07-01), Stefanich
patent: 1669423 (1928-05-01), Schmidgall

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