Method and system for calculating and reporting slump in delivery vehicles
US8020431B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2007 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Jun 12, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28C7/026
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for managing a concrete delivery vehicle having a mixing drum 14 and hydraulic drive 16 for rotating the mixing drum, including a rotational sensor 20 configured to sense a rotational speed of the mixing drum, a hydraulic sensor 22 coupled to the hydraulic drive and configured to sense a hydraulic pressure required to turn the mixing drum, a temperature sensor for sensing temperature of the drum, and a communications port 26 configured to communicate a slump calculation to a status system 28 commonly used in the concrete industry, wherein the sensing of the rotational speed of the mixing drum is used to qualify a calculation of current slump based on the hydraulic pressure required to turn the mixing drum. Temperature readings are further used to qualify or evaluate a load. Also, water purge connections facilitate cold weather operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.