Device and method for determining cleanliness of a rotating drum of a fresh concrete mixer truck
US11230217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2020 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Oct 6, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28C7/026
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for determining cleanliness of a drum of a fresh concrete mixer truck. The method generally has: rotating the drum about the rotation axis with a constant torque; using a rotational speed sensor, measuring a plurality of speed values corresponding to speeds at which the drum rotates at different moments in time during said rotating; and using a controller, receiving the plurality of speed values; accessing calibration data having different reference speed values-related data associated to corresponding reference degrees of cleanliness of the drum; comparing at least some of the speed values to the calibration data; and determining a degree of cleanliness of the drum based on said comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.