Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Set screw
Patent
1990-07-26
1991-12-17
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Set screw
411188, 411959, 403362, F16B 3500
Patent
active
050730746
ABSTRACT:
This invention relates to a set screw comprising a shank having external threads and a work-engaging end portion integrally formed at one end of the shank. The work-engaging end portion has a frustohemispherical outer surface comprising a plurality of circumferentially spaced serrations in the form of teeth. Each of the teeth comprises a ramp extending outwardly from a root to a crest thereof with the ramp being inclined in a direction which is opposite to the direction of rotation of engaging the set screw in a workpiece. A cavity is formed in the outer extremity of the work-engaging end portion. The cavity cooperates with the frustohemispherical outer surface to form therebetween an annular wedge. The work-engaging end portion can be readily formed by a forging process.
REFERENCES:
patent: 752628 (1904-02-01), Miner
patent: 1330792 (1920-02-01), Frick
patent: 2235435 (1941-03-01), Koester
patent: 2245525 (1939-08-01), Dicely
patent: 2295314 (1942-09-01), Whitney
patent: 2314274 (1943-03-01), Hallowell
patent: 2462910 (1949-03-01), Simmons
patent: 2631635 (1953-03-01), Klooz
patent: 2778265 (1957-01-01), Brown
patent: 2907245 (1959-10-01), Whitson
patent: 2992669 (1961-07-01), Fesmire
patent: 3286754 (1966-11-01), Klooz et al.
patent: 3419058 (1968-12-01), Walker
patent: 3920060 (1975-11-01), Heldmann et al.
patent: 4764068 (1988-08-01), Crispell
National Machinery Publication-"Tool Design and Part Shape Development for Multi-Die Cold Forming", 1976.
Beegan Desmond
Corrigan Niall
Keating Gerry
Dee James D.
Nerenberg Aaron
SPS Technologies, Inc.
Wilson Neill R.
LandOfFree
Set screw does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Set screw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Set screw will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-832965