Alvin A Choma

US Patent:

50679350, Nov 26, 1991

Filed:

May 17, 1990

Appl. No.:

7/524739

Inventors:

Anthony K. Brown - Exeter, GB2
Alvin A. Choma - Grosse Pointe Farms MI
Timothy R. Edwards - Warren MI

Assignee:

Dyneer Corporation - Scottsdale AZ

International Classification:

F16H 3708

US Classification:

475248

Abstract:

An interaxle differential includes a central drive member that continuously connects an input shaft with a first output shaft, a clutch disk normally connecting the central drive member with a second output shaft, a rotational velocity responsive device operable from a deactivated position to an activated position for disengaging the clutch disk when the second output shaft overruns the first output shaft by a given value, a fail safe device for biasing the velocity responsive device toward its deactivated position, a first device for displacing the velocity responsive device toward the activated position, and an override device for selectively disengaging the clutch disk. In a second embodiment, the rear clutch disk is operable by the operator to disconnect the interaxle differential from the first output shaft, thereby to avoid the trapping of torque within the interaxle differential when the vehicle is maneuvered downhill in a turn.

US Patent:

46448187, Feb 24, 1987

Filed:

Oct 29, 1984

Appl. No.:

6/665969

Inventors:

Alvin A. Choma - Grosse Pointe Farms MI
Timothy R. Edwards - Warren MI

Assignee:

Tractech, Inc. - Warren MI

International Classification:

F16H 3504

US Classification:

74650

Abstract:

The improved differential apparatus includes an annular center cam member having an internal radially-inwardly directed alignment shoulder the opposite end surfaces of which are engaged by the adjacent ends of the side gears, respectively, which side gears include external annular flanges the remote surfaces of which abut the differential housing end walls, respectively, thereby to accurately position the center cam member relative to the annular center driver member, whereby the use of a snap ring for centering the center cam member relative to the center driving member is avoided. In the illustrated embodiment, the use of conventional holdout rings is avoided, thereby reducing the complexity and cost of the apparatus.