Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2005-11-01
2005-11-01
Michalsky, Gerald A. (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C251S129160, C335S281000
Reexamination Certificate
active
06959732
ABSTRACT:
At least one solenoid actuator and a valve are at least partially positioned within a body of an hydraulic device. The solenoid actuator includes at least one solenoid coil mounted to a stator that defines a guide bore in which a push pin moves between a first position and a second position. The valve includes a valve member that is operably coupled to move with the push pin. The push pin is attached to an armature that is positioned adjacent the solenoid coil. In order to increase the durability of the solenoid actuator, a relatively hard, nonmagnetic material is positioned between an inner surface of the stator that is made from a relatively soft, magnetic material and an outer surface of the push pin.
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Cotton III Clifford E.
Ohligschläger Olaf
Shinogle Ronald D.
Stockner Alan R.
Caterpillar Inc.
Liell & McNeil
Michalsky Gerald A.
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