Patent ID: 6880806
Filing Date: 2005-04-19
Classification: F16K,Y10T

Abstract:
1. A valve gear comprising: a valve for controlling a flow rate of a fluid, an opening of the valve being determined according to a rotational position of a valve element; an actuator for providing a rotational force to a rotary valve shaft that changes the valve opening; and attaching/detaching means for detachably attaching said valve to said actuator, wherein said attaching/detaching means comprises a locking element formed at prescribed positions with locking concave/convex portions, and an engaging element formed at prescribed positions with engaging concave/convex portions, and a holding portion for holding said engaging element rotatably around the rotary valve shaft up to a prescribed angle, said locking element and said engaging element are relatively rotatable around said rotary valve shaft up to the prescribed angle, and said engaging element and said locking element prevent said actuator from coming off said valve at an engaging position where said engaging concave/convex portions and said locking concave/convex portions are engaged with one another, and allow said actuator and said valve to be detached from each other at a disengaging position where engagement between said engaging concave/convex portions and said locking concave/convex portions is released.