| 主权项 |
1. A product comprising:
at least one housing, a valve stem having a longitudinal axis and supported in the housing for providing for axial movement, a cam-gear supported in the housing and having a central axis of rotation, and including an integrated cam portion formed about the central axis of rotation, wherein, when the cam-gear and cam portion are rotated, the cam portion operably transmits a force to the valve stem causing the valve stem to move axially and; wherein the central axis of rotation of the cam portion is offset by a distance from the longitudinal central axis of the valve stem and so that the force transmitted by the cam portion to valve stem is essentially along the longitudinal central axis of the valve stem. |
