Lightweight self-leveling automatic screed apparatus
US7204657B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 21, 2005 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Dec 10, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F21/244
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lightweight one man screed apparatus to automatically strike off and level uncured concrete flatwork, includes a tri-pod framework beneath which a cutting/leveling member operates. The apparatus is controlled by two grade setting devices, adjustably mounted to the screed tool, which may be adjusted relative to a laser plane generating system. Physical control of the screed member may be provided by at least one screed tool pivotal arm assembly moved for and aft by a carriage operated under the tri-pod framework within a fore and aft footprint. The screed tool is adjusted to grade by being raised or lowered by at least one linear actuators responding to an electronic controller. When moving the framework and screed assembly into freshly poured concrete, an operator is assisted by retractable wheels. The wheels are rotationally stowable or used deployed as part of the tripod/transport system facilitating mobility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.