Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Patent
1984-12-28
1987-01-20
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Thread or shank structure
F16B 3504
Patent
active
046377670
ABSTRACT:
A thread fastener for fastening resilient material workpieces with small torque to obtain a strong fastening force, wherein the fastener is provided with equivalent height continuous thread convolutions on a shank and a plurality of spaced thread-type projections are petaliferously formed and on the equivalent height thread convolutions which are arranged at an appropriate lead angle.
REFERENCES:
patent: 3180202 (1965-04-01), Kahn
patent: 3426642 (1969-02-01), Phipard
patent: 3850074 (1974-11-01), Simons
Nakada Fumio
Tanaka Takao
Yaotani Kouichi
Yoshida Minoru
Smith Gary L.
Topura Co., Ltd.
Whitcomb, Jr. Adrian H.
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