Mandrel for bending
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United States of America Patent
Stats
-
May 22, 2007
Grant Date -
Dec 23, 2004
app pub date -
Jun 16, 2004
filing date -
Jun 19, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mandrel for bending which inhibits generation of irregularities on the inside of the bend is provided. The mandrel comprises a plurality of plugs in the form of discs and a through-hole is created substantially in the center of each plug. A flexible member is inserted through the through-holes of the respective plugs. One end of the flexible member is fixed to a shank so that the plugs are connected to the shank in series. Each plug is provided with a flat slant surface that descends from about the center of the plug toward the outer periphery of the plug. A lock hole is formed in parallel to the through hole in each plug and a flexible lock member, one end of which is fixed to the shank, is passed through the lock holes of the respective plugs.
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