Title:
EXPANSION DEVICE FOR HOLLOW BODY
Document Type and Number:
Japanese Patent JP2006247747
Kind Code:
A
Abstract:
To provide an expansion device the service life or the life of which is remarkably prolonged especially a expanding mandrel of a system.
The spreader jaw 15 is guided movably in the radial direction by the axial movement of the expanding mandrel 10 in a union cap 14 and a part which acts at least on the spreader jaw of the expanding mandrel of a tube expansion device of the hollow body provided with a coating layer for reducing wear the sliding surface of which is composed of a hard material is provided with the coating layer consisting of a hard material.
Inventors:
ROTHENBERGER HELMUT
Application Number:
JP2006062947A
Publication Date:
September 21, 2006
Filing Date:
March 08, 2006
Export Citation:
Assignee:
ROTHENBERGER AG
International Classes:
B21D39/20; B21D37/01
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel