Valves and valve actuation – Electrically actuated valve – Including solenoid
Reexamination Certificate
2008-07-08
2011-12-27
Fristoe, Jr., John (Department: 3753)
Valves and valve actuation
Electrically actuated valve
Including solenoid
C251S129150
Reexamination Certificate
active
08083206
ABSTRACT:
A solenoid actuator includes a hard guide piece and a soft flux piece. The hard guide piece has a stop surface ground to create a final air gap distance between the soft flux piece and a stator assembly when the stop surface on the guide piece is in contact with the stator assembly. The final air gap is set by grinding the stop surface on the guide piece so that the distance between the stop surface on the guide piece and a top surface on the soft flux piece along an axis of the guide bore is equal to the final air gap. The step of grinding the armature assembly may be done after attaching the guide piece and the flux piece together. In an exemplary embodiment, the step of grinding the stop surface and associated guide surface(s) are performed in a single chucking.
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Ibrahim Daniel R.
Lakhapati Shriprasad G.
Lewis Stephen R.
Manubolu Avinash R.
Caterpillar Inc.
Fristoe, Jr. John
Liell & McNeil
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