Patent ID: 7143996

Claim:
A throttle valve connection fitting for an internal combustion engine, comprising a housing having walls defining an internal through opening extending along a longitudinal axis, said opening comprising opposing internal surfaces defining a first and second region with a bearing region therebetween, said first region inclined at a first angle to said longitudinal axis, said second region inclined at a second angle to said longitudinal axis and said bearing region inclined at a third angle to said longitudinal axis such that said third angle is smaller than said first angle which is smaller than said second angle, said first and second region defining a substantially conical shape and said bearing region defining a substantially circular shape along said longitudinal axis; and a throttle valve located within said opening, said valve having a cylinder body with ends defining an angle to said longitudinal axis substantially equal to said third angle when said valve is in a closed position, said valve pivotably mounted on a pivot axis extending transverse to said longitudinal axis such that said valve pivots between an open position and said closed position, said open position permitting throughflow and said closed position halting said throughflow, and said closed position further defined by said valve positioned such that said ends contact said bearing region.