Patent ID: 7614416

Claim:
A method of making a throttle-valve housing and a throttle valve, comprising the steps of: fabricating said housing and valve as a single cast injection molding, said housing comprising inner walls defining an internal through-opening, said valve comprising a radially encircling edge in contact with said inner wall; demolding a cast after said cast hardens; cutting along said edge so as to separate said valve and housing; providing a pair of opposing bearing bores in said housing, said bearing bores shaped and positioned to accommodate said ends therein: inserting a core part in each of said bearing bores, each of said part having a diameter substantially equivalent to an internal diameter of said bearing bore and an outer diameter of said shaft bore, said bore further having a flat side face which faces one another when each of said bores is inserted into each of said bearing bores; wherein said opening comprises a central longitudinal axis and said method further comprises the step of pivotably mounting said valve along a pivot axis, said pivot axis extending transverse to said central axis; and wherein said throttle valve comprises a shaft and a shaft bore positioned on said pivot axis said shaft bore shaped so as to rotatably accommodate a portion of said shaft therein, and said method further comprising the step of mounting said shaft into said shaft bore such that ends of said shaft extend beyond said shaft bore.