Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Pilot end having means enhancing fastening or installation
Patent
1982-07-07
1984-12-04
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Pilot end having means enhancing fastening or installation
411416, 411417, 10 10R, 10152T, F16B 2500
Patent
active
044861354
ABSTRACT:
A tapping screw in which a shank includes a main shank portion having a substantially uniform diameter and a reduced diameter shank portion having a substantially rounded triangle shaped cross-section. Tapping is carried out by the apexes of the rounded triangle in the reduced diameter shank portion, and therefore, screwing torque is greatly reduced as well as the fastening force is greatly increased as compared with a conventional tapping screw.
REFERENCES:
patent: 3370501 (1968-02-01), Ansingh
patent: 3597781 (1971-08-01), Eibes et al.
patent: 3978760 (1976-09-01), Muenchinger
patent: 4069730 (1978-01-01), Gutshall
patent: 4235149 (1980-11-01), Veldman
Holko Thomas J.
Kabushiki Kaisha Aoyama Seisakusho
Wilson Neill
LandOfFree
Tapping 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 Tapping screw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tapping screw will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1580061