Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1987-10-27
1989-06-20
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411903, 411908, F16B 1306
Patent
active
048405221
ABSTRACT:
A synthetic resin rivet comprises a rivet body having a hollow cylindrical portion and an integral flange portion extending radially outwardly from the upper end of the cylindrical portion and a pin for radially expanding the cylindrical portion of the rivet body when inserted thereinto. The rivet body has a double-layer structure constituted by two different synthetic resins, one relatively hard and the other relatively soft. At least an outer layer of the cylindrical portion and a cap layer closing an end opening of the cylindrical portion is fabricated from the soft synthetic resin so as to provide reliably effective annular sealing defined between the cylindrical portion of the rivet and the interior peripheral surfaces of the holes defined within panels within which the rivet is to be disposed. In addition, the cap portion is radially expanded so as to achieve plastic deformation and thereby prevent radial contraction of the soft resin cylindrical portion of the rivet which would otherwise degrade the effective sealing property thereof.
REFERENCES:
patent: 2562721 (1951-07-01), Jakosky
patent: 2849201 (1958-08-01), Schelgunov
patent: 3082807 (1963-03-01), Tinnerman
patent: 3417438 (1968-12-01), Schuplin
patent: 4311421 (1982-01-01), Okada et al.
patent: 4405256 (1983-09-01), King
patent: 4610587 (1986-09-01), Wollar et al.
patent: 4674257 (1987-06-01), Rose
Nifco Inc.
Ringel Douglas E.
Smith Gary L.
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