Patent ID: 9624964
Date: 2017-04-18
CPC Classifications: B21D,F16C,F16F,Y10T

Claim:
1. A hydroformed driveshaft tube, comprising: a first end portion; a second end portion; and a middle portion at least partially defined by a circular arc shaped surface of revolution and at least a portion of the middle portion having a diameter greater than a diameter of the first end portion and the second end portion, the middle portion comprising a first distension, a constriction, and a second distension, wherein the middle portion is formed between the first end portion and the second end portion, at least one of the first distension and the second distension is defined by the circular arc shaped surface of revolution, the circular arc shaped surface of revolution having a radius about 40 times greater than a radius of the first end portion and the second end portion, and the constriction is formed between the first distension and the second distension.