192 clutches and power-stop control – Clutches – Fluent material
Reexamination Certificate
2008-01-15
2008-01-15
Burch, Melody M. (Department: 3683)
192 clutches and power-stop control
Clutches
Fluent material
C192S058800, C192S058660
Reexamination Certificate
active
07318510
ABSTRACT:
A drive for a cooling fan at motor vehicles including a main cooling circuit and at least one secondary cooling circuit using a fluid friction clutch including a control element for the drive of the cooling fan is described.In case of a plurality of cooling circuits, such fluid friction clutches do not react as desired by actuating the cooling fan.To prevent this disadvantage, a drive for a cooling fan being drivable by a fluid friction clutch is to be provided, in which the cooling fan starts operation as soon as there is a requirement in at least one of the cooling circuits.For this reason, temperature sensors are allocated to selected secondary cooling circuits and further control element is allocated to the working chamber to bypass the control element, the control element freeing a further opening being located in the separating wall when predetermined temperatures and temperature ranges, respectively, are attained in at least one of the selected secondary cooling circuits, the opening not being influenced by the control element.
REFERENCES:
patent: 3908604 (1975-09-01), Vocklinghaus
patent: 4305491 (1981-12-01), Rohrer
patent: 4351425 (1982-09-01), Bopp
patent: 4467901 (1984-08-01), Hattori et al.
patent: 4727969 (1988-03-01), Hayashi et al.
patent: 5215044 (1993-06-01), Banzhaf et al.
patent: 5381761 (1995-01-01), Tanaka
patent: 5957663 (1999-09-01), Van Houten et al.
patent: 6021747 (2000-02-01), Gee et al.
patent: 6220416 (2001-04-01), Katoh et al.
patent: 2163835 (1986-03-01), None
Heinle Hans
Leutner Siegfried
AGCO GmbH & Co
Burch Melody M.
MacMillan Sobanski & Todd LLC
LandOfFree
Liquid friction clutch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid friction clutch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid friction clutch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2752979