192 clutches and power-stop control – Clutches – Operators
Reexamination Certificate
2006-05-15
2009-08-11
Lorence, Richard M. (Department: 3655)
192 clutches and power-stop control
Clutches
Operators
C192S085060, C192S101000
Reexamination Certificate
active
07571794
ABSTRACT:
A hydraulic clutch actuation system having a hydraulic clutch control device which includes at least one clutch master cylinder that communicates via a pressure-medium line with a clutch slave cylinder used for actuating a clutch device, the pressure prevailing in the pressure-medium line being relievable via at least one emergency release valve device to permit disengagement of the clutch device in an emergency situation. The hydraulic clutch actuation system is distinguished in that the emergency release valve device has a seal-carrier device for a sealing element which is movable in response to an electromagnet out of an open position, in which a pressure-medium inlet is open, into a closed position in which the sealing element seals the pressure-medium inlet.
REFERENCES:
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patent: 2004/0231943 (2004-11-01), Berger et al.
patent: 2005/0258014 (2005-11-01), Berger et al.
patent: 2006/0131123 (2006-06-01), Grethel et al.
patent: 2007/0007097 (2007-01-01), Fraser et al.
patent: 1 236 918 (2002-09-01), None
patent: 1 367 283 (2003-12-01), None
Cooper Michael
Dyke Melvin
Fraser Leigh
Harries David Anthony
Lethbridge James Antony
Davidson Davidson & Kappel LLC
Lorence Richard M.
LuK Lamellen und Kupplungsbau Beteiligungs KG
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