High efficiency snowthrower
US4897942A · kind A · utility
14Cited by
17References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1988 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Oct 14, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/6625
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A snow removal apparatus operable in a substantially optimum efficiency state using a variable ratio pulley. The snow removal apparatus includes a feature for sensing power demand made on the snowthrower under variable snow conditions. Responsive to the power demand, the fan speed and/or auger speed is reduced or increased in order to use the full engine power without stalling the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.