192 clutches and power-stop control – Clutches – Operators
Reexamination Certificate
2005-10-07
2008-11-11
Lorence, Richard M. (Department: 3681)
192 clutches and power-stop control
Clutches
Operators
C192S1030FA, C475S088000
Reexamination Certificate
active
07448482
ABSTRACT:
A torque-coupling assembly comprises a rotatable torque-coupling case, a friction clutch assembly for selectively engaging the torque-coupling case and an output shaft, a hydraulic pump for generating a hydraulic fluid pressure and a variable pressure-relief valve assembly to selectively control the clutch assembly. The variable pressure-relief valve assembly includes a valve closure member, a valve seat and an electro-magnetic actuator for engaging the valve closure member and generating a variable axial electro-magnetic force acting to the valve closure member so as to selectively vary a release pressure of the pressure-relief valve assembly. The electro-magnetic actuator includes an inverted electro-magnetic coil assembly and an armature disposed inside the electro-magnetic coil assembly and axially movable relative thereto. The torque-coupling assembly further comprises at least one plenum passage provided adjacent to an inner peripheral surface of the armature for directing hydraulic fluid exiting the torque-coupling case through the electro-magnetic actuator.
REFERENCES:
patent: 5048564 (1991-09-01), Gaiardo
patent: 5350340 (1994-09-01), Paul et al.
patent: 5623960 (1997-04-01), Kawamura et al.
patent: 6183387 (2001-02-01), Yoshioka
patent: 6527664 (2003-03-01), Hunt
patent: 6692396 (2004-02-01), Grogg et al.
patent: 6702708 (2004-03-01), Goto et al.
patent: 6733411 (2004-05-01), Kaplan et al.
patent: 6843271 (2005-01-01), Weldon et al.
patent: 6902506 (2005-06-01), Schrand
patent: 7241247 (2007-07-01), Hunt et al.
patent: 2002/0139634 (2002-10-01), Porter
patent: 2003/0162622 (2003-08-01), Fusegi et al.
patent: 2005/0003923 (2005-01-01), Ishikawa
patent: 2007/0068763 (2007-03-01), Park
Berenato White & Stavish
Dana Automotive Systems Group LLC
Lorence Richard M.
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