Vacuum cleaner with adjustable speed power assist
US5504971A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1992 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Jun 4, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20462
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A self propelled upright vacuum cleaner drive system integral with the axle of the drive wheels including an operator controlled reversing clutch transmission incorporating a separate unidirectional AC motor for forward and reverse control of the drive system independent from the vacuum cleaner suction motor. A triac controlled variable speed adjust circuit controls the rotational speed of the motor and thus the driven wheels on the base unit, while-a separate operator controlled adjustable response mechanism sets the engagement tension of the vacuum cleaner and transmission assembly corresponding to either a quick or a slow response of the axle of the drive wheels when actuated by the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.