Cutting by use of rotating axially moving tool – Tool or tool with support – Having axial – core-receiving central portion
Patent
1990-09-25
1991-07-30
Briggs, William
Cutting by use of rotating axially moving tool
Tool or tool with support
Having axial, core-receiving central portion
B23B 5104
Patent
active
050355503
ABSTRACT:
A shank 1 has, at the front end of its drive shaft 2, a drive collar 3 formed substantially integrally with the drive shaft 2. The drive collar 3 is formed, centrally of its front side, with a boss 4 projecting therefrom, and has a bolt receiving through-hole 7 bored therein at a position spaced apart from the boss 4 and in parallel relation to the axis of the shank 1. The base 16 of a hole saw body 15 has a center hole 18 bored in a center portion thereof for engagement with the boss 4, and also has at least one threaded hole 20 bored at a position spaced apart from the center hole 18. A bolt 6 for thread engagement with the threaded hole 20 of the base 16 of the hole saw body 15 is received in the bolt receiving through-hole 7 of the drive collar 3 in order to lock the hole saw body 15 to the drive collar 3 and to transmit drive torque to the hole saw body 15.
REFERENCES:
patent: 3758221 (1973-09-01), Meshulam et al.
patent: 3973862 (1976-08-01), Segal
patent: 4148593 (1979-04-01), Clark
patent: 4669928 (1987-06-01), Mediavilla
patent: 4968189 (1990-11-01), Pidgeon
Briggs William
House B. M. Co., Ltd.
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