Apparatus for preventing cross threading in blind, high precisio

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Headed bolt or screw with threads and complementary nut

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Details

411436, 411533, 220327, F16B 3300, F24H 100

Patent

active

049417894

ABSTRACT:
In a high precision oil filter, a blind engagement of a threaded coupling with a supported shaft can be made without misalignment or cross threading in the coupling by providing, for a male threaded shaft having threads of a designed pitch and peak outer diameter, a mated female coupling having threads of the same pitch and size, and providing within the female coupling a cylindrical throat having an internal diameter equal to the peak outside diameter of the male coupling and a smooth cylindrical surface of a length at least equal to three times the thread pitch and preferably equal to five times the thread pitch.

REFERENCES:
patent: 555300 (1896-02-01), Browne
patent: 1930103 (1933-10-01), Mechling
patent: 2454962 (1948-11-01), Brown
patent: 3901122 (1975-08-01), Novotny
patent: 4005629 (1977-02-01), Franklin
patent: 4069575 (1978-01-01), Sigmund
patent: 4717299 (1988-01-01), Underwood

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