Ultrasonic rodent control device and method
US4001817A · kind A · utility
19Cited by
8References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1974 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Oct 23, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B2201/75
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus for controlling rodents is disclosed utilizing ultrasonic signals. The ultrasonic signals are of the square wave type. They are varied from approximately 28 to 20 KHz during the first time period of approximately 20 microseconds, then maintained at a frequency of approximately 20 KHz for a second time period of approximately 780 microseconds. The generated square wave signals are converted to sound waves by a transducer such as a speaker. The frequencies employed and the duration of these frequencies are selected to maximize the irritating effect upon the rodents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.