Tube expander
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 20, 1991
Grant Date -
N/A
app pub date -
Oct 31, 1990
filing date -
Dec 7, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a tube expander having a reciprocating member for selectively reciprocating a plurality of mandrels for expanding tubes. Each mandrel includes a bullet, having a diameter which is larger than the inner diameter of the tubes, at the one end thereof. The tube expander of the present invention comprises an engage section formed at a head section of the mandrel, the diameter of the engage section is larger than the shaft section of the mandrel. A fixture is provided with the reciprocating member and having a through-hole through which the shaft section of the mandrel is inserted. A stopper is provided on the rear face of the fixture and being independently moved with respect to the head section of the mandrel by a drive means. The stopper prevents the mandrel from moving in the axial direction thereof with respect to the fixture during the movement of the stopper.
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