Fluid friction clutch
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United States of America Patent
Stats
-
Dec 4, 1990
Grant Date -
N/A
app pub date -
Aug 25, 1989
filing date -
Sep 2, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Normally, fluid friction clutch having cup disks, in order to permit the circulating of clutch fluid in the relatively small cylindrical ring gap between the housing and the cup disk, must be provided with thread-type conveying grooves. According to the invention, these expenditures are avoided in that the cup disk, on its closed side, is provided with a surrounding edge which projects beyond the cylindrical circumferential surface radially toward the outside and which is flush with the front face of the cup disk. Radial grooves preferably lead into this edge and are provided at the front face. The cup disk preferably be combined with axially extending notches in the cylindrical ring surface of the housing and with conical openings by means of which an intense circulation of the coupling fluid is ensured. The clutch is to be used for the drive of fans for vehicle engines.
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