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:
Jan. 11, 2000
Filed:
Jun. 01, 1998
Lyle O Hoppie, West Bloomfield, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A lamination structure for an electromagnetic device such as a linear machine having a coaxially aligned field assembly and armature assembly. In one embodiment, the field assembly reciprocates relative to the armature assembly to actuate the valve. One configuration has a field assembly with a number of axially oriented annular permanent magnets separated by a ferromagnetic material comprised of a stack of relatively thin ferromagnetic discs which are oriented such that the geometric planes of the discs are generally perpendicular to the working magnetic field and mounted on a non-magnetic shaft. The discs are sized to optimize the conduction of the working magnetic flux while minimizing eddy currents. The housing for the device is comprised of a plurality of tubular laminations. The preferred construction provides a reluctance force which helps maintain the valve in an open or closed state without any current applied to the device.