Self plugging blind rivet
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 3, 1991
Grant Date -
N/A
app pub date -
May 11, 1990
filing date -
May 11, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The self plugging blind rivet with a large grip range includes a tubular shell having a head at one end and an elongate shank portion which includes axial slits for permitting the shank portion to expand radially to form a blind head. The bore extends through the head and the shank portion and includes a shoulder at a midportion thereof to form a locking portion of reduced diameter. A stem is fitted in the bore of the tubular shell and includes a head positioned adjacent the another end of the shell, as well as a shank having a breakneck. A shoulder formed adjacent the stem head has an enlarged diameter swaging portion, while a split ring is formed on the stem shank between the breakneck and the swaging portion. During the setting of the rivet, the swaging portion deforms the locking portion of the shell so that the material thereof flows around the split ring for locking the stem within the set rivet. A taper portion of the shell bore accepts excess material from the locking portion to increase the grip range of the rivet. The split ring can be formed in the same heading machine as the stem itself.
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