Combined variable-speed drive and speed reducer for pumps and fans
US5947854A · kind A · utility
37Cited by
8References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1998 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Apr 1, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H3/72
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A variable speed drive for fans and pumps. An impeller is connected to a primary motor and an auxiliary motor/generator through a transmission. The transmission includes an epicyclic gearing system. The primary motor is run at constant speed. The auxiliary motor/generator is driven at variable speeds to control the speed of the impeller. The device may be used to retrofit an existing pump or fan system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.