Patent ID: 7201537

Claim:
A vibration isolation system for an engine-driven vibratory screed, including a blade, a vibratory exciter mechanism attached to the blade, an operating handle frame connected to the exciter mechanism, and an engine operatively connected to the exciter mechanism, the improvement comprising: the frame including a frame member having end portions adapted for operative attachment to laterally opposite sides of the exciter mechanism; an elastomeric vibration isolator captured between each end portion and a surface of the exciter mechanism, said isolator mounted to permit a limited amount of horizontal shear movement between the frame end portions and the exciter mechanism; the exciter mechanism having an exciter housing positioned between the end portions of the frame member and an upwardly extending exciter drive shaft; and, the engine positioned above and supported on the exciter housing by an engine output shaft housing, and including a downwardly extending output shaft connected to the exciter drive shaft with a flexible coupling, and vibration isolating shock absorbing means independent of each of said vibration isolators interconnecting the output shaft housing and the exciter housing.