Fatigue improvement nut

Details Fatigue improvement nut Fatigue improvement nut

1974-12-09

1976-01-20

Parsons, Jr., Marion

Brushing, scrubbing, and general cleaning

151 9, F16B 3104

Patent

active

039330745

ABSTRACT:
The threads at the entrance end of a nut are interrupted by a plurality of circumferentially spaced axially extending flutes to form relatively flexible load distributing threads. The flutes extend axially across a limited number of threads and extend radially into the threads a distance short of the root of the thread. After engagement with a complimentary bolt, and upon the occurrence of a load on the connection, the interrupted threads flex axially of the nut to cushion shock on the bolt threads and shift the zone of maximum stress transfer axially inwardly of the nut, thereby materially extending fatigue life of the connection.

REFERENCES:
patent: 579547 (1897-03-01), Perry
patent: 1544132 (1925-06-01), Cook
patent: 2601651 (1952-06-01), Wandy

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