Driveshaft with two-stage stiffness

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United States of America Patent

PATENT NO 9416815
APP PUB NO 20160097420A1
SERIAL NO

14503531

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Abstract

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A two-stage stiffness driveshaft includes a hollow cylinder defined by a longitudinal axis, a first end, a distal second end, and a hollow cylinder stiffness. The driveshaft also includes an inner shaft extending through the hollow cylinder along the longitudinal axis and defined by a first end, a distal second end, and an inner shaft stiffness. The first end of the inner shaft is engaged with the first end of the hollow cylinder via a rotational clearance fit. The second end of the inner shaft is rotationally fixed to the second end of the hollow cylinder such that the first end of the inner shaft can twist to a predetermined angle with respect to the second end of the inner shaft. The inner shaft stiffness defines a first-stage stiffness of the driveshaft, and the inner shaft stiffness and the hollow cylinder stiffness together define a second-stage stiffness of the driveshaft.

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Patent Owner(s)

Patent OwnerAddress
GM GLOBAL TECHNOLOGY OPERATIONS LLC300 RENAISSANCE CENTER MAIL CODE 482-C22-A68 P O BOX 300 DETROIT MI 48265

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Defenderfer, Eric J Brighton, US 6 72
Ernster, Stephanie A Novi, US 1 5
Gehringer, Mark Milford, US 3 6
Grimmer, Michael J Troy, US 16 72
Miller, Stephen H South Lyon, US 29 576

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