Planetary gear transmission systems or components – Differential planetary gearing – Spur gear differential
Reexamination Certificate
2006-12-05
2006-12-05
Estremsky, Sherry (Department: 3681)
Planetary gear transmission systems or components
Differential planetary gearing
Spur gear differential
C475S150000, C475S154000
Reexamination Certificate
active
07144347
ABSTRACT:
A differential limiting device includes a planetary gear mechanism, in which a planetary carrier rotatably distributes the rotational power of a front housing to a ring gear and a sun gear through planetary gears and hence, to a first inner shaft and a second inner shaft which are rotatable respectively with the ring gear and the sun gear. A pilot clutch, when in friction engagement, brings about relative rotation between a cam ring and the second inner shaft to axially move the second inner shaft by the action of a cam mechanism provided therebetween. The axial movement of the second inner shaft causes the first inner shaft to be axially moved, whereby a main clutch arranged between the front housing and the first inner shaft is brought into friction engagement. When in friction engagement, the main clutch limits the relative rotation between the ring gear and the planetary carrier.
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Estremsky Sherry
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Toyoda Koki Kabushiki Kaisha
Young Edwin A.
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