Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Elongated head – e.g. – hanger bolt – etc.
Patent
1988-08-01
1990-01-30
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Elongated head, e.g., hanger bolt, etc.
411409, 16121, F16B 2300, F16B 3506
Patent
active
048970077
ABSTRACT:
A steady pin, which is renovated from a push pin, contains a threaded stem and an elliptical cylinder head with a vertical concave periphery surface. The threaded stem can provide the steady pin with a better horizontal load holding capability and a better tacking repetability at the same tacked position on a wall or a board when the steady pin is tacked by a user. The elliptical head of the steady pin can generate a proper amount of torque on a steady pin by user's thumb and index finger such that the rotating motion of the steady pin is easy to be performed. The vertical concave periphery surface on the steady pin head is utilized to generate a vertical force from the user's fingers to push the steady pin into or pull the steady pin out of a wall, bulletin, or notice board.
REFERENCES:
patent: 434650 (1890-08-01), Adams
patent: 885687 (1908-04-01), Chenoweth
patent: 2294802 (1942-09-01), Reich
patent: 3995650 (1976-12-01), DiVito
Chen Feichu H.
Chen Haw-Renn
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