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:
Aug. 11, 1987
Filed:
Jan. 13, 1986
Dwight E Booth, Janesville, WI (US);
Michael L Cory, Beloit, WI (US);
Dana Corporation, Toledo, OH (US);
Abstract
A method of forming non-magnetic barriers in the coupling disc (e.g., the armature or rotor) of an electromagnetic coupling such as a clutch or brake. The method is carried out by moving the disc relative to a laser beam which cuts a slot through the disc. In one embodiment, the slot is filled throughout its entire length by non-magnetic material, the filling being effected by continuously advancing a non-magnetic wire toward the laser beam to cause the wire to be melted by the beam and to flow into the newly formed slot. In another embodiment, the wire is advanced intermittently to form short non-magnetic bridges beween relatively long slots.