Method of inserting a threaded fastener into a fastening element

Details Method of inserting a threaded fastener into a fastening element Method of inserting a threaded fastener into a fastening element

1998-02-25

2000-02-08

Bryant, David P.

Metal working

Method of mechanical manufacture

With testing or indicating

2940702, B23Q 1722

Patent

active

060215550

ABSTRACT:
A method of inserting a threaded fastener having a threaded portion into a fastening element having a threaded recess. The method includes the steps of positioning the threaded portion of the threaded fastener at an entry point of the threaded recess and rotating the threaded fastener in a counterclockwise direction causing the thread on the threaded portion to ride up the thread within the recess. The counterclockwise rotation is continued until a termination point of the thread on the threaded portion has passed a termination point of the thread within the recess, detection of such passing is determined by axial movement of the threaded fastener into the recess. At this point, the counterclockwise rotation of the threaded fastener is ceased and the threaded fastener is now rotated in a clockwise direction causing the thread on the threaded portion to ride within a groove between the rotations of the thread within the recess until a predetermined desired torque is achieved fastening the threaded fastener within the fastening element. Inserting a threaded fastener into a fastening element in this manner causes mating of the threads and eliminates any cross-threading which may occur.

REFERENCES:
patent: 4785520 (1988-11-01), Bourdonne et al.
patent: 5014794 (1991-05-01), Hansson
patent: 5105519 (1992-04-01), Doniwa
patent: 5215270 (1993-06-01), Udocon et al.
patent: 5216795 (1993-06-01), Hansson
patent: 5502883 (1996-04-01), Ohmi et al.
patent: 5549169 (1996-08-01), Matsumura et al.
patent: 5591919 (1997-01-01), Hathaway et al.

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