Screw tap with predetermined protective rupture of release point

Details Screw tap with predetermined protective rupture of release point Screw tap with predetermined protective rupture of release point

1992-06-19

1993-08-10

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With means to apply transient, fluent medium to work or product

Including tool with duct

408222, 408226, B23G 506

Patent

active

052342930

ABSTRACT:
A tap for forming internal threads on the inner wall of a bore wherein the shank portion has a rupture location at the time of over torquing. The rupture location may be created by the junction of two shank parts having different sized cross sections, an internal cavity within the axial bore of the shank, opposing holes perpendicular to the longitudinal axis of the shank, the junction of two coaxial bores in the shank having different sized diameters, junction of two shank parts with one such part being of softer material than the other, or opposing notches formed on the exterior of the shank.

REFERENCES:
patent: 1398156 (1921-11-01), Schroder
patent: 2101347 (1937-12-01), Robinette
patent: 2740974 (1956-04-01), Lewis
patent: 3458882 (1969-08-01), Kelly

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