Apparatus for making shaped concrete articles
US4398878A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1981 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Apr 17, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B11/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for adjusting the tolerances regarding the shape and dimensions of an elongated vibrated concrete article made in a mold after removing the article from the mold, making it possible to achieve close tolerances even when using a rather wet concrete composition optimized as regards strength. According to the invention, the article, before hardening, is brought into engagement with one long side of a straight-edge rule for being shaped thereby, the article is pressed on its end surfaces to a predetermined length, and the cross-sectional shape of the article is adjusted to agree with the intended cross-sectional shape while keeping the article in engagement with the rule and pressing it on the end surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.