Patent ID: 7029221

Claim:
A device for holding a piece in a bore, comprising: a cylindrical sleeve constructed to be inserted into the bore and held therein by engagement of its outer surface with an inner surface of the bore, the ends of the sleeve being substantially identical and exposed for insertion in the bore; and a series of fins extending longitudinally of an inner surface of the sleeve and projecting inwardly from the inner surface of the sleeve, the fins being spaced from each other circumferentially of the sleeve with tips disposed to engage an outer surface of a piece inserted into the sleeve, wherein the sleeve and the fins are integrally formed of resilient flexible plastic, the fins are skewed in a same circumferential direction relative to radial planes of the sleeve, a dimension of each fin along a direction of its inward projection is substantially greater than the thickness of the fin, and a dimension of each fin longitudinally of an inner surface of the sleeve is a plurality of times greater than the thickness of the fin, and the flexibility of the fins is such that the fins can be readily deflected when engaged by an inserted piece.