Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...
Patent
1985-09-25
1987-09-01
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Nut, and means to engage substructure on its opposite faces...
411188, F16B 3704
Patent
active
046905995
ABSTRACT:
A self-piercing adapted to be affixed to a metal panel. The nut includes a substantially rectangular body, with a pilot portion provided at the center of an upper surface of the body, which pilot portion is defined by a circumferential side wall which is slightly converged toward an upper surface of the body. The pilot portion includes a punching face disposed around the threaded bolt accommodating hole. Seat faces are provided at each corner of the body, with each seat face being defined toward the pilot portion by a wall spaced from the circumferential side wall of the pilot portion but facing the same. A top level of the seat faces is slightly lower than that of the punching face of the pilot portion. A recess is defined by a space lying between the pilot portion and the seat faces. The recess is opened to continue each side of the rectangular body between adjacent seat faces. The recess is adapted to accept a displaced portion of the metal panel when a punch is applied to the nut so as to strengthen the union between the nut and the panel and prevent relative rotation between the nut and panel.
REFERENCES:
patent: 2486769 (1949-11-01), Watson
patent: 3469613 (1969-09-01), Steward
patent: 3736969 (1973-06-01), Warn et al.
patent: 3793658 (1974-02-01), Ladouceur
patent: 3810291 (1974-05-01), Ladouceur
Smith Gary L.
Whitcomb, Jr. Adrian H.
Yugen Kaisha Shinjoseisakusho
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