Roller-type ultrasonic inspection devices
US4472974A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1982 |
| Grant date | Sep 25, 1984 |
| Priority date | — |
| Expiry date | Dec 7, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/2493
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A roller-type ultrasonic inspection device for inspecting vehicle tires comprises a roller assembly 20 mounted on a non-rotatable hug 16. Two piezoelectric crystals 80,82 are mounted in the hub 16 such that their principal transmitting/receiving axes A and B converge generally radially outwardly of the hub. The angle between the axes A and B is selected such that when the roller assembly 20 is urged into rolling contact with the tread-bearing surface of a tire 90, the axes meet (allowing for refraction effects) in the body of the tire beneath the tread. This ensures that the device can detect defects in the body of the tire, and is relatively insensitive to the tread.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.