Title:
AN HOLLOW FORMWORK FOR A INSITU REINFORCING CONCRETE STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2003/029573
Kind Code:
A1
Abstract:
An hollow formwork for a insitu reinforcing concrete structure such as a concrete floor is disclosed, which comprises an hollow tube (1) having a circular, square, trapezoid or other profile shape in section. A transversely stiffening rib (2) is fixed to the inside of the hollw tube (1) in a direction perpendicular to the axis thereof so as to form a double-directions hollow tube member. A reinforcing bar (7) is formed on the two sides of the transversely stiffening rib (2) which may be extend beyond the hollow tube (1). The reinforcing bar (7) is extend outside the tube (1) to form an reinforcing bar (8).
Inventors:
QIU ZEYOU (CN)
Application Number:
PCT/CN2002/000698
Publication Date:
April 10, 2003
Filing Date:
September 29, 2002
Export Citation:
Assignee:
QIU ZEYOU (CN)
International Classes:
E04B5/38; (IPC1-7): E04B5/38
Domestic Patent References:
| WO1992003622A1 | 1992-03-05 |
Foreign References:
| CN1303980A | 2001-07-18 | |||
| CN1297095A | 2001-05-30 | |||
| EP0617180A2 | 1994-09-28 | |||
| FR2516962A1 | 1983-05-27 | |||
| FR2098568A5 | 1972-03-10 | |||
| CN1303979A | 2001-07-18 | |||
| CN1308169A | 2001-08-15 | |||
| EP0073691A2 | 1983-03-09 | |||
| EP0149433A2 | 1985-07-24 | |||
| GB829308A | 1960-03-02 | |||
| CN2160693Y | 1994-04-06 | |||
| US3999341A | 1976-12-28 | |||
| CN2417222Y | 2001-01-31 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD (Bldg. B Tsinghua Tongfang Hi-Tech Plaza, No.
1, Wangzhuang Rd, Haidian District Beijing 3, CN)
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