Title:
合成樹脂管
Document Type and Number:
Japanese Patent JP4744399
Kind Code:
B2
Abstract:
A synthetic resin pipe is provided to reinforce its internal pressure deformation strength by making each edge of a square box into an arc and tapering the corner axially to make four edges at the corner meet at one point. A synthetic resin pipe is a pipe body(P) including square boxes(2) and circular tubes(3) which are installed alternately. Each corner(2a) of the square box is tapered toward an edge(t). The sectional shape of each corner is formed like an arc. Therefore, the strength of the corner of the square box is increased without increasing weight and required amount of resin.
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Inventors:
Nanami Tsunehiro
Application Number:
JP2006235207A
Publication Date:
August 10, 2011
Filing Date:
August 31, 2006
Export Citation:
Assignee:
Totaku Industry Co., Ltd.
International Classes:
F16L11/11; H02G9/06
Domestic Patent References:
| JP2005057848A | ||||
| JP10325490A | ||||
| JP8219333A |
Attorney, Agent or Firm:
Yoshio Kashima