Heavy-duty cover for torque converter

Details Heavy-duty cover for torque converter Heavy-duty cover for torque converter

2007-11-20

2007-11-20

Bonck, Rodney H. (Department: 3681)

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

Reexamination Certificate

active

11174267

ABSTRACT:
A heavy-duty replacement torque converter cover for an automatic transmission designed to withstand the mechanical stresses generated during the torque converter lock-up cycle and other peak torque events in diesel engine pick-up trucks is disclosed. The present cover includes an internal spline that achieves up to a 70% increase in spline tooth engagement with a mating friction plate in the lock-up clutch in comparison to the original equipment cover providing increased torque capacity to the lock-up clutch. This is accomplished by machining a true internal spline within the cover on gear shaping equipment instead of utilizing the so-called Grob cold forming method, which provides only a simulated internal spline comprised of interlocking embossments having substantially less torque capacity than the present internal spline. The present cover also provides a thicker lock-up clutch surface, increased structural support for stud weldments, reduced stress cracking, improved heat dissipation, and increased service longevity.

REFERENCES:
patent: 4785924 (1988-11-01), Jackel
patent: 4821855 (1989-04-01), Jackel
patent: 5407041 (1995-04-01), Fukunaga et al.
patent: 5515955 (1996-05-01), Victoria et al.
patent: 2006/0000682 (2006-01-01), Yamamoto et al.

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