초록 ▼

A valve assembly (14) has an internal main flow passage through a valve body (24) between a first port (25) and a second port (26), an electric actuator (30), and a valve (86) operated by an armature (58) of the actuator to selectively open and close the passage. A force-balancing mechanism (92) app

A valve assembly (14) has an internal main flow passage through a valve body (24) between a first port (25) and a second port (26), an electric actuator (30), and a valve (86) operated by an armature (58) of the actuator to selectively open and close the passage. A force-balancing mechanism (92) applies to the valve (86) a force that opposes force created by pressure differential between the first and second ports. The valve has cushion media (76, 80, 142) that cushions impact of lateral displacements of the armature and cushion media (76) for cushioning axial impact between the armature and stator. An overmold (32) encloses internal parts, and one of the ports contains sonic nozzle structure (28). the valve exhibits improved noise attenuation, durability, and performance.

대표청구항 ▼

[ We claim:] [17.] An electric-operated valve assembly comprising a body having an internal main flow passage between a first port and a second port, an annular valve seat in circumscribing relation to the passage, an electric actuator comprising a guide hole, a walled sleeve extending axially in th

[ We claim:] [17.] An electric-operated valve assembly comprising a body having an internal main flow passage between a first port and a second port, an annular valve seat in circumscribing relation to the passage, an electric actuator comprising a guide hole, a walled sleeve extending axially in the guide hole, an armature guided substantially for axial motion within the sleeve but with some lateral clearance that allows slight lateral displacements of the armature to occur as the armature is moved axially by the actuator, a valve operated by the armature to selectively open and close the passage, and a medium for cushioning impact of lateral displacements of the armature, the medium being disposed axially between the sleeve and the guide hole.