Blind rivet
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 20, 1990
Grant Date -
N/A
app pub date -
May 26, 1989
filing date -
May 27, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A blind rivet able to be anchored in material such as softwood, without the need to break through the blind face of the material, comprises a tubular shell and a stem which extends through the shell. The shell has a preformed heat at one end of a shank. An end portion of the shank remote from the head has a thinner wall than the main, next adjacent, portion of the shank, and is thus weakened and made more easily expandible. The stem has a plugging portion having an expander head adjacent the thin-walled end portion of the shell, a breakneck, and a pulling portion which projects from the head end of the shell. The expander head increases in diameter away from the pulling portion, and presents a plurality of longitudinal cutting elements generally towards the weakened end portion of the shell. On gripping the pulling portion and pulling the stem, the cutting elements split the end portion of the shell into a plurality of legs, while the expander head enters into the end portion and forces the legs outwardly. The main part of the shank has a smaller diameter bore than the weakened end portion, and resists entry of the expander head.
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