Title:
SHEATH HAVING EXHAUST PORT
Document Type and Number:
Japanese Patent JP2003321900
Kind Code:
A
Abstract:
To provide a sheath having an exhaust port, which minimizes stagna tion of air in the sheath at the time of charging grout in the same.
According to the structure of the sheath, projections (40) (40) for regulating the extent of fitting of the PC sheath into fitting cylinders (22) (22), are formed on an inner peripheral surface of a sheath main body (21) at locations between the exhaust port (30) and the respective fitting cylinders (22) (22). On this occasion, gaps (41) (41) are secured on an upper side of the sheath, for passing the grout therethrough. By virtue of the securement of the gaps, flow of the grout becomes smooth in the sheath, and therefore stagnation of air in the vicinity of the projections (40) (40) hardly occurs.
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Inventors:
KIKUMORI YASUHIRO
MURAYAMA TERUO
KOIZUMI YOSHIYUKI
MURAYAMA TERUO
KOIZUMI YOSHIYUKI
Application Number:
JP2002130751A
Publication Date:
November 14, 2003
Filing Date:
May 02, 2002
Export Citation:
Assignee:
TOTAKU IND
International Classes:
E04C5/10; E01D1/00; E04B1/38; (IPC1-7): E04C5/10
Attorney, Agent or Firm:
Hisayuki Tarumoto