Combined formwork and cavity tray
US4202143A · kind A · utility
5Cited by
2References
12Claims
0Family size
Inventors
Key dates
| Filing date | Jun 12, 1978 |
| Grant date | May 13, 1980 |
| Priority date | — |
| Expiry date | Jun 12, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04C2003/023
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A combined formwork and cavity tray element for use in the construction industry having first and second web portions joined together by a third web portion forming an included angle of more than 90.degree. with each of the first and second web portions. The first web portion is substantially straight throughout its longitudinal direction and the second web portion is curved in the vertical direction towards the plane containing the uppermost elongate flat surface of the first web portion. If desired, the element may include a box-section wherein the second web portion comprises the top wall thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.