Abstract A rotary damper for the air valve of an air valve carburetor. The damper comprises a rotor attached to one end of the air valve mounting shaft and rotating in a viscous fluid medium that dampens air valve oscillation without affecting normal air valve operation. Lands on the rotor and the rotor housing increase the amount of damping at any given air valve opening. Each of said lands on the rotor and housing has a significant surface area. The air valve rotating the rotor from a position in which the lands are adjacent each other to a position in which the lands are removed from each other. The lands and the fluid medium providing an increased amount of damping when the lands are adjacent each other. The housing is only partially filled with the fluid medium and the land of the rotor is positioned out of the fluid and adjacent the land on the housing for an increased amount of damping.
In an air valve carburetor having a carburetor body with an induction passage therein and an air valve mounted on a shaft in said induction passage, a damping device comprising: a housing attached to said carburetor body, said housing containing a fluid medium and having at least one land means on a surface in contact with said fluid medium; and a rotor attached to said shaft and positioned rotatably in said housing, said rotor being in contact with said fluid medium and having at least one land means located on the surface facing the land means on the housing, each of said land means on the housing and the rotor having a significant surface area said air valve rotating said rotor from a position in which said land means are adjacent each other to a position in which said land means are rEmoved from each other, said land means and said fluid medium providing said rotor with an increased amount of damping when said land means are adjacent each other.
Claim 2
Dependent Claim
170 words
In an air valve carburetor having a carburetor body with an induction passage therein and an air valve mounted on a shaft in said induction passage, a damping device comprising: a housing attached to said carburetor body, said housing containing a fluid medium and having at least one land means on a surface in contact with said fluid medium; and a rotor attached to said shaft and positioned rotatably in said housing, said rotor being in contact with said fluid medium and having at least one land means located on the surface facing the land means on the housing, each of said land means on the housing and the rotor having a significant surface area said air valve rotating said rotor from a position in which said land means are adjacent each other to a position in which said land means are rEmoved from each other, said land means and said fluid medium providing said rotor with an increased amount of damping when said land means are adjacent each other.
Claim 3
Dependent Claim
77 words
The carburetor of claim 1 in which the rotational axis of the rotor is substantially horizontal, the housing is filled only partially with the fluid medium and the land means of the housing is submerged in the fluid medium, said air valve rotating said land means of the rotor out of said fluid for a reduced amount of damping and into said fluid and adjacent the land means on the housing for an increased amount of damping.