Mechanically locking fastener

Details Mechanically locking fastener Mechanically locking fastener

1976-07-15

1978-01-10

Parsons, Jr., Marion

Brushing, scrubbing, and general cleaning

151 19A, 151 25R, 151 48, 151 49, F16B 3932

Patent

active

040673715

ABSTRACT:
A mechanically locking fastener has external threads for installation in the threaded bore of a workpiece. A lock ring has internal radial serrations locked in serrations of the fastener proper, and external radial teeth of a form for gripping the wall of the workpiece bore when turning moments tend to loosen the fastener and to pass over the bore wall upon rotation in the opposite direction. The lock ring has a slip plane to permit contraction of the ring to a diameter no greater than the major diameter of the fastener and expansion of the ring when the fastener undergoes moments tending to loosen it. The fastener proper may be a stud or an insert. An external chamfer of the ring bears against a cooperating internal surface of the workpiece to positively determine the axial location of the insert with respect to the workpiece.

REFERENCES:
patent: 644159 (1900-02-01), Blanton
patent: 1539348 (1925-05-01), Botscheller
patent: 1714711 (1929-05-01), Elkin
patent: 1991574 (1935-02-01), Rabezzana
patent: 2877818 (1959-03-01), Johnson
patent: 2886089 (1959-05-01), Schlage
patent: 3259161 (1966-07-01), Rosan
patent: 3390900 (1968-07-01), McCormick et al.
patent: 3454072 (1969-07-01), Dietlein

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