Self-retaining close tolerance bushing

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means

Patent

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Details

411501, F16B 1306

Patent

active

043635806

ABSTRACT:
In combination with a structural component, an improved self-retaining, non-metallic, molded bushing suitable for use in close tolerance applications--viz., applications where the inside and/or the outside diameters of the bushing must be maintained within .+-.0.005" and, in many instances, within .+-.0.002". More particularly, a self-retaining, non-metallic, close tolerance molded bushing having: (i) a tubular body portion with an outside diameter D.sub.1 ; (ii) an integral, enlarged, premolded first retaining head at one end of the tubular body portion; (iii) the tubular body portion having an axially extending area of reduced wall thickness at its opposite end terminating in an outwardly flared extremity having an outside diameter D.sub.2 (where D.sub.2 is greater than D.sub.1) and defining a resilient, deformable flip portion at the end of the tubular body portion remote from the enlarged first retaining head; (iv) an annular groove formed interiorly of the tubular body portion at the inboard end of the resilient, deformable flip portion for permitting the resilient, deformable, flip end to be expanded and flipped outwardly and reversely folded backwardly upon the tubular body portion so as to define a second enlarged retaining head; and (v), an integral stepped external shoulder having an outer diameter D.sub.3 (where D.sub.3 is at least equal to and, preferably greater than, D.sub.2 but is less than the diameter of the first enlarged retaining head) formed on the tubular body portion intermediate the first enlarged retaining head and the annular groove for providing a snug close tolerance fit in the bushing-receiving hole in the structural component(s) into which the bushing is inserted.

REFERENCES:
patent: 357118 (1887-02-01), Dion
patent: 985761 (1911-02-01), Ogden
patent: 1951168 (1934-03-01), Roth
patent: 3099057 (1963-07-01), Cook
patent: 3665800 (1972-05-01), Ryder

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