Ultrasonic medical instrument
US4535759A · kind A · utility
61Cited by
10References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N7/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ultrasonic friction reducing device is comprised of an ultrasonic generator having a special sweep frequency oscillator, a piezoelectric crystal transducer and a cervical dilator probe. The generator produces an oscillatory electric current for the operation of the device. The piezoelectric crystal transducer converts the oscillatory electric current produced by the generator into a vibratory mechanical motion. The transducer, through mechanical coupling, transmits the ultrasonic energy into the friction reducing probe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.