Fan with fluid friction clutch
US3993415A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1974 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Dec 19, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D25/022
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a fan with a fluid friction clutch wherein the housing of the clutch is connected with the fan or has fan blades attached thereto and wherein the surface of the clutch housing facing the air intake opening of the fan is provided with cooling ribs to carry off slippage heat, the improvement comprises flow direction means for reducing the effects of the secondary air flow around the clutch housing. The flow directing means comprise either the cooling ribs on the surface of the clutch housing facing the air intake opening of the fan which ribs are curved at the outer edges thereof in a direction reverse to that of the rotation of the fan; cooling ribs of construction angled in reverse direction to that of the direction of rotation of the fan; annular cooling ribs; or cooling ribs of conventional radial arrangement covered by a flow directing intake housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.