The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2013
Filed:
Nov. 09, 2011
Jayaraman K. Venkataraghavan, Dunlap, IL (US);
Saboor Sheikh, Dunlap, IL (US);
Daniel Richard Ibrahim, Metamora, IL (US);
Michael C. Long, Metamora, IL (US);
Nadeem N. Bunni, Cranberry Township, PA (US);
Jayaraman K. Venkataraghavan, Dunlap, IL (US);
Saboor Sheikh, Dunlap, IL (US);
Daniel Richard Ibrahim, Metamora, IL (US);
Michael C. Long, Metamora, IL (US);
Nadeem N. Bunni, Cranberry Township, PA (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A solenoid actuator includes a stator assembly with a stator core of formed powder metal received in a stator housing. A ferromagnetic protective sleeve is in contact with and covers a majority of an inner end face and a cylindrical wall of the stator core, while a flux ring is in contact with and covers an outer end face of the stator core. An armature assembly includes an armature attached to a stem that is movable in an air gap relative to the ferromagnetic protective sleeve. A spring is operably positioned in the ferromagnetic protective sleeve but electrically isolated from the stator housing. The stator core is encapsulated to protect against erosion and fragmentation. A magnetic flux line around a solenoid coil passes through the stator core, the ferromagnetic protective sleeve, the armature, the flux ring and back to the stator core.