Patent ID: 7340815

Claim:
A method for inserting a valve stem in a valve stem aperture defined by a wheel comprising: moving the valve stem relative to the valve stem aperture in a first rotational direction along a curved path to align the valve stem with the valve stem aperture; locating the valve stem aperture with a first sensor of a first sensing device and a first sensor of a second sensing device, wherein said first and second sensing devices are movable in unison with each other, as the valve stem and the valve stem aperture are a first angular distance from one another along the curved path; and moving the valve stem relative to the valve stem aperture in a second rotational direction along the curved path opposite to the first rotational direction to align the valve stem with the valve stem aperture; and locating the valve stem aperture with a second sensor of the first sensing device and a second sensor of the second sensing device when the valve stem and the valve stem aperture are a second predetermined angular distance from one another along the curved path while moving in a second rotational direction.