Method and an apparatus for producing a draining channel
US3990249A · kind A · utility
5Cited by
3References
14Claims
0Family size
Inventor
Key dates
| Filing date | Jul 21, 1975 |
| Grant date | Nov 9, 1976 |
| Priority date | — |
| Expiry date | Jul 21, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F16/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A strip of snow is applied to a support surface which is to be drained, and covered with a quick-setting concrete. When the snow melts after setting of the quick-setting concrete, the space between the support structure and the set concrete which was previously taken by the snow serves as a draining channel. The apparatus for producing the channel includes a snow-making machine, a spray nozzle for the snow, and a spray nozzle for the quick-setting concrete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.