Patent ID: 8746210
Filing Date: 2014-06-10
Classification: F02D,F16F,F16K

Abstract:
1. A helical torsion return spring for urging a throttle plate of a throttle body assembly to a default position, said spring comprising: a middle portion wound at a middle winding radius effective to define a middle portion center axis, a middle portion first end, and a middle portion second end; a first end portion wound at a first end winding radius and extending from the middle portion first end effective to define a first end portion center axis, and a first end portion termination, wherein the first end winding radius is less than the middle winding radius and the first end portion center axis is offset from the middle portion center axis; a second end portion wound at a second end winding radius and extending from the middle portion second end effective to define a second end portion center axis, and a second end portion termination, wherein the second end winding radius is less than the middle winding radius and the second end portion center axis is offset from the middle portion center axis; a first spring leg that extends from the first end portion termination; and a second spring leg that extends from the second end portion termination.