US 7,490,585 B2
	Balance shaft for a reciprocating piston engine
Christian Friedrich, Graz (Austria)
Assigned to Magna Drivetrain AG & Co KG, Lannach (Austria)
Appl. No. 10/534,568 PCT Filed Nov. 12, 2003, PCT No. PCT/AT03/00340 § 371(c)(1), (2), (4) Date Feb. 17, 2006, PCT Pub. No. WO2004/044452, PCT Pub. Date May 27, 2004.
Claims priority of application No. GM 764/2002 (AT), filed on Nov. 12, 2002.
Prior Publication US 2006/0137645 A1, Jun. 29, 2006
Int. Cl. F02B 75/06 (2006.01); F16C 3/00 (2006.01)

U.S. Cl. 123—192.2  [464/180]

16 Claims

1. A compensating shaft for reciprocating piston engines comprising at least one compensating weight with an eccentric center of gravity, the compensating weight being connected torsionally elastically to the compensating shaft, wherein the compensating weight surrounds the compensating shaft with its edge zones and a window is formed therebetween in the longitudinal direction, wherein an elastic element is disposed within the window and is supported on the compensating shaft in the circumferential direction, and wherein the elastic element is made of plastic and has an elasticity which is graduated in the circumferential direction including a hard central part interconnected with the compensating shaft which is firm in the circumferential direction, and a soft part bearing against the compensating weight.