Controlled force safety switch mechanism
US4336626A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1980 |
| Grant date | Jun 29, 1982 |
| Priority date | — |
| Expiry date | Dec 11, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/2857
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A safety switch for a vacuum cleaner which includes a vacuum cleaner housing, at least two attachments adapted to be affixed to the housing, and a switch casing fixed to the housing. First and second slides are mounted for reciprocation in the casing relative to the casing and relative to each other. A pair of socket openings are provided in the casing. Each of the slides are provided with a cam surface which is located in each socket opening. Each cam surface slopes inwardly toward a central axis of each socket. Each attachment has a probe adapted to enter one or the other of the sockets when the attachment is mounted on the cleaner. Each of the probes being adapted to move the first and second slides in opposite directions a predetermined total relative distance. The first slide is adapted to operate a first plurality of switch arms while the second slide is adapted to operate a second plurality of switch arms. The switch arms of one of the pluralities alternating with the switch arms of the other one of the pluralities so that contact will be made between at least two switch of each plurality when a probe is inserted in one of said sockets and so that contact will be made betwee…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.