Ultrasonic scanning apparatus
US4587971A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1984 |
| Grant date | May 13, 1986 |
| Priority date | — |
| Expiry date | Nov 29, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/355
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An ultrasonic scanning apparatus includes a rotor, first and second electromagnetic stators, and an ultrasonic transducer mounted on the rotor. Each electromagnetic stator has two curved pole faces arranged opposite pole faces on the rotor. The electromagnetic stators are arranged on opposite sides of the axis of rotation of the rotor. The stator pole faces are tapered such that on rotation of the rotor in one direction, the gaps between the rotor and a first stator decrease while the gaps between the rotor and the other stator increase. On rotation of the rotor in the opposite direction, the gaps between the rotor and the first stator increase and the gaps between the rotor and the second stator decrease. Means are provided for alternately energizing the first and second electromagnetic stators to cause the rotor to oscillate about the axis of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.