Domestic appliance comprising a tool
US4759192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Apr 6, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S366/601
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A domestic ice-cream maker comprises a refrigerated bowl-shaped container for an ice-cream mass; a rotatable stirring tool associated with such container for scraping off ice-cream freezing at a refrigerated surface of the container; and a single-phase synchronous motor for rotating the stirring tool, such motor having a maximum permissible operating temperature for making the ice-cream. A transmission path including a reduction mechanism extends between the synchronous motor and the stirring tool. Backlash is provided in the reduction mechanism as overload protection for the synchronous motor, the backlash acting in both directions of rotation of the motor and corresponding in each such direction of rotation to at least 10 revolutions of the motor, the motor, upon being blocked in either direction of rotation, reversing its direction of rotation and passing through the range of the backlash without exceeding its maximum permissible operating temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.