Quick-fastening nut

Details Quick-fastening nut Quick-fastening nut

1990-07-10

1991-07-16

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Internally threaded fastener element, e.g., nut, etc.

Multipart

411270, 744248A, F16B 3708

Patent

active

050320483

ABSTRACT:
A quick-fastening nut for location on an associated bolt comprises a plurality of internally-threaded, arcuate segments each including a part frusto-conical portion, and guide means reacting between the segments whereby the segments can be moved radially towards and away from one another between inoperative positions displaced outwardly of concentricity and operative positions substantially concentric with one another and whereby a frusto-conical surface is presented by the portions. The nut further comprises releasable means for retaining the segments in their operative positions, the arrangement being such that, in use, the frusto-conical surface defined by the portions engages a correspondingly-shaped mating surface of a component, such as the piston of a hydraulic bolt tensioner or a washer, bounding the bolt, relative axial movement between the nut and the component urging the segments radially inwardly into positive threaded engagement with the bolt.

REFERENCES:
patent: 950431 (1910-02-01), Bradford
patent: 3151653 (1964-10-01), Zahodiakin
patent: 3157215 (1964-11-01), Zahodiakin
patent: 3352341 (1967-11-01), Schertz
patent: 4378187 (1983-03-01), Fullerton

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