Vibration isolator with crank driven inertia bar

DETAILED DESCRIPTION The invention resides in a vibration isolator for use with two bodies which are movable relative to one another with elastic restraint along a given line of action.
The isolator includes an elongated inertia bar connected intermediate its ends to one of the bodies for pivotal movement relative to that body about a first pivot axis, and a crank arm is fixed relative to the inertia bar and connected to the other of the two bodies at a point spaced from the first axis so that as the two bodies move relative to one another along the line of action the crank arm oscillates the inertia bar.
The inertia bar has its center of gravity located substantially on the first pivot axis and the point at which the crank arm is connected to the other body is located approximately in a plane containing the first pivot axis and generally perpendicular to the line of action.
Further, the inertia bar has its longitudinal axis at an angle to such plane, and this angle may be varied to suit the limitations of the space available for the isolator.
The invention also resides in the crank arm being connected to the other body by a link pivotally connected at its opposite ends to the crank arm and to the other body, by the inertia bar having two weights located on opposite sides of the first pivot axis, by the weights being adjustable toward and away from the first pivot axis, and by the crank arm being formed integral with the inertia bar.