Testing machine for pavement samples
US5659140A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1996 |
| Grant date | Aug 19, 1997 |
| Priority date | — |
| Expiry date | Aug 13, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0222
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for testing pavement test samples for for surface wear, including rutting, stripping and fatigue, is disclosed. The testing machine includes a testing chamber and a sample tray that is adapted for holding one or more test samples. The machine also includes a hose for each test sample to be tested. Each hose is disposed above a test sample in the sample tray in such fashion that the hose may be deflected to contact a least a substantial portion of the sample. A mechanism is also provided for pumping a fluid into each hose and for maintaining fluid pressure within the hose. The testing machine also includes a testing wheel assembly that is disposed above the hose assembly within the chamber. The testing wheel assembly is adapted for reciprocating movement on a track and includes a loading wheel for each hose. A loading cylinder is also provided for each loading wheel, with cylinder is adapted for applying a downwardly directed load to such wheel as the loading wheel moves back and forth along a hose that is in contact with sample beneath. The testing machine also includes an immersion pan into which a sample tray may be placed in the chamber, and a mechnism is provided f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.