Magnetic safety interlock method and apparatus for food processor
US4371118A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1980 |
| Grant date | Feb 1, 1983 |
| Priority date | — |
| Expiry date | Jun 2, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H36/0073
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Safety interlock method and apparatus employing magnetic effects for food processors having a base enclosing a motor drive, working bowl detachably mountable on the base for receiving various rotatable tools removably installable on drive means in the bowl, with removable cover for the bowl. Such food processors normally include a hopper or feed tube on the cover with manually operated pusher for feeding food items down it to the rotating tool. The safety interlock in one embodiment prevents actuation of the drive to prevent tool rotation unless two conditions are met: (1) the working bowl is in proper position and (2) the cover is in proper position. The safety interlock in another embodiment prevents actuation of the motor drive unless three conditions are met: (1) bowl in proper position, (2) cover in proper position, and (3) food pusher is inserted into the feed tube. If there is a relatively large feed tube, the user is thus prevented by the inserted food pusher from inadvertently inserting a hand or foreign object into it. By virtue of this latter interlock, the feed tube can safely be made of larger cross-sectional area so that larger food items can be inserted whole. Moreov…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.