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
Patent
1988-02-03
1990-07-17
Wilson, Neill R.
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
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
Norcross Alexander F.
Wilson Neill R.
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