Clutch device for automatic speed changer

Details Clutch device for automatic speed changer Clutch device for automatic speed changer

2005-05-06

2009-12-29

Lorence, Richard M. (Department: 3655)

192 clutches and power-stop control

Clutches

Operators

C192S048800, C192S085060

Reexamination Certificate

active

07637363

ABSTRACT:
A clutch device for an automatic transmission includes a clutch drum, first and second frictional coupling elements, both supported by the clutch drum, a first piston axially movably disposed radially outwardly of the clutch drum and operating to couple the first frictional coupling elements, and a second piston axially movably disposed radially inwardly of the clutch drum and operating to couple the second frictional coupling elements. The clutch drum includes an inner drum portion welded on a rotary shaft, and an outer drum portion welded on the inner drum portion and supporting the first and second frictional coupling elements. The first piston is axially slidable relative to the inner drum portion. The second piston is axially slidable relative to the rotary shaft. And, a welded portion of the rotary shaft and the inner drum portion, and a welded portion of the inner drum portion and the outer drum portion, are radially spaced in a predetermined distance and concentric with each other.

REFERENCES:
patent: 4237749 (1980-12-01), Koivunen
patent: 7249665 (2007-07-01), Heinrich et al.
patent: 2003/0232675 (2003-12-01), Miyazaki et al.
patent: 1469054 (2004-01-01), None
patent: 61 77455 (1986-05-01), None
patent: 63 246541 (1988-10-01), None
patent: 2003-42184 (2003-02-01), None
patent: 2003 106341 (2003-04-01), None
patent: 2003-130085 (2003-05-01), None

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