Patent ID: 8668249

Claim:
A frame for a cab of a mobile machine, the cab frame comprising: a first primary tube comprising first and second about vertically extending portions and an about horizontally extending portion, the about vertically extending portions configured to be connected to the mobile machine, and the about horizontally extending portion disposed between the about vertically extending portions, the first primary tube being formed by hydroforming; a second primary tube comprising first and second about vertically extending portions and an about horizontally extending portion, the about vertically extending portions of the second primary tube configured to be connected to the mobile machine, and the about horizontally extending portion of the second primary tube disposed between the about vertically extending portions of the second primary tube, the second primary tube being formed by hydroforming; and first and second secondary tubes, each of the first and second secondary tubes connecting to the first and second primary tubes, wherein the first secondary tube has a minimum value of a width at an about center thereof and has a maximum value of a depth at the about center thereof, the width of the first secondary tube measured about perpendicular to a plane and the depth of the first secondary tube measured about parallel to the plane, the plane defined by uppermost surfaces of the about horizontally extending portions of the first and second primary tubes, the maximum value being greater than the minimum value.