Lightweight plastic concrete mold
US4842241A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1988 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | May 5, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S249/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A mold for forming concrete having a bottom, a pair of side walls and a pair of end walls, all of plastic, and with the side walls and bottom being of integral one-piece construction and hinged together by living hinges defined by reduced thickness of the plastic panel. The ends walls are shaped with generally U-shaped channels dimensioned to lock onto the ends of the bottom and side walls whereby a watertight concrete mold is formed. The concrete mold is assembled by pivoting the side walls to an upright position relative to the bottom by means of the living hinges and the end walls are then secured to the bottom and side walls. The mold can be disassembled for removal of a formed concrete specimen by removal of the end walls and pivoting the side walls downwardly to a generally coplanar relation with the bottom to expose the test specimen for removal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.